FD-LOK Instrument needle valve pipeline system is an important part of the main shut-off valve and ball valve, its function is to make open or cut off the pipeline pathway used. Card sets of instrumentation needle valve has easy installation and removal, connections are tight, there is conducive to fire, explosion and high voltage capability, good sealing performance, etc., are power plants, oil refineries, chemical plant and instrument measuring line in an advanced connection valve. Needle-shaped shut-off valve sealing good, long life, even if the sealing surface is damaged, only need to replace wearing parts, you can continue to use.
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2015年12月30日星期三
2015年12月26日星期六
Selection principles stainless steel needle valve
Selection principles stainless steel needle valve
1, the pipeline system and cryogenic medium, should use low temperature plus bonnet needle valves.
2, the pipeline system FCCU refining apparatus, the choice of needle valve lift rod.
3, apparatus and piping systems of chemical systems and other corrosive acid medium, should use austenitic stainless steel, Teflon seat ring of stainless steel needle valve.
4, metallurgy systems, piping systems or devices on power systems, petrochemical plants, urban heating systems in high-temperature media, the choice of metal to metal seal needle valve.
5, the need for flow regulation, the choice of the worm gear, pneumatic or electric with a V-shaped opening regulating needle valve.
6, transmission mains oil, natural gas, the need to clean the pipeline, and the need for laying in the ground, use full bore, all-welded structure of the needle valve; buried in the ground, select full bore welding connection or flange connection The ball valves.
7, transmission pipelines and oil products storage facilities, the choice of the needle valve flange connection.
8, city gas and natural gas pipelines, the choice of the needle valve flange connection and female connection.
9, metallurgical oxygen piping system, should use rigorous degreasing treatment, needle valve flange connection.
1, the pipeline system and cryogenic medium, should use low temperature plus bonnet needle valves.
2, the pipeline system FCCU refining apparatus, the choice of needle valve lift rod.
3, apparatus and piping systems of chemical systems and other corrosive acid medium, should use austenitic stainless steel, Teflon seat ring of stainless steel needle valve.
4, metallurgy systems, piping systems or devices on power systems, petrochemical plants, urban heating systems in high-temperature media, the choice of metal to metal seal needle valve.
5, the need for flow regulation, the choice of the worm gear, pneumatic or electric with a V-shaped opening regulating needle valve.
6, transmission mains oil, natural gas, the need to clean the pipeline, and the need for laying in the ground, use full bore, all-welded structure of the needle valve; buried in the ground, select full bore welding connection or flange connection The ball valves.
7, transmission pipelines and oil products storage facilities, the choice of the needle valve flange connection.
8, city gas and natural gas pipelines, the choice of the needle valve flange connection and female connection.
9, metallurgical oxygen piping system, should use rigorous degreasing treatment, needle valve flange connection.
2015年12月22日星期二
A method for preserving instrumentation needle valve
A method for preserving instrumentation needle valve
First, the body of anti-corrosion, mainly the correct selection of materials. Although the anti-corrosion materials is very rich, but whether the election was appropriate or not an easy thing, because corrosion problems are complex. Select body material difficulties, it lies not only consider the corrosion problem, but you must consider the pressure temperature capabilities, whether economically justified, is it easy to buy and other factors.
Second it is to take lining measures, such as the lining of lead, aluminum lining, plastic lining, lining of natural rubber and various synthetic rubber. The medium conditions permit, This is an economical way.
Again, under pressure, the temperature is not high, with a non-metallic material to make the valve body, often very effective in prevention and control corrosion. In addition, the outer surface of the FD-LOK stainless needle valves body is also exposed to atmospheric corrosion of steel materials generally are in the painting to protect.
First, the body of anti-corrosion, mainly the correct selection of materials. Although the anti-corrosion materials is very rich, but whether the election was appropriate or not an easy thing, because corrosion problems are complex. Select body material difficulties, it lies not only consider the corrosion problem, but you must consider the pressure temperature capabilities, whether economically justified, is it easy to buy and other factors.
Second it is to take lining measures, such as the lining of lead, aluminum lining, plastic lining, lining of natural rubber and various synthetic rubber. The medium conditions permit, This is an economical way.
Again, under pressure, the temperature is not high, with a non-metallic material to make the valve body, often very effective in prevention and control corrosion. In addition, the outer surface of the FD-LOK stainless needle valves body is also exposed to atmospheric corrosion of steel materials generally are in the painting to protect.
2015年12月18日星期五
Stainless steel needle valve standard
Stainless steel needle valve standard needle valve with easy installation and removal, the needle valve connections are tight, the needle valve is conducive to fire, explosion and high pressure needle valves capability. Needle valve sealing performance is good, etc. valve power plants, oil refineries, chemical plant and instrument measuring line in an advanced connection mode. Good sealing needle valve, needle valve long service life, even after the needle valve sealing surface damage, needle valves only need to replace wearing parts, the needle valve can continue to use. Needle valve should be installed so that the flow is consistent with the direction of the arrow on the valve media. Needle valve is a valve can be accurately adjusted wider use such as flame cutting of cutting away the flame temperature adjustment knob is needle valves, instrumentation needle valve instrument measuring pipeline system is an important part of the needle valve main There are cut-off valves and ball valves, needle valves whose function is turned on or off as a pipe path available.
2015年12月14日星期一
Instrument needle valve construction and installation points
Instrument needle valve construction and installation points
1), the installation position, altitude, direction and export must meet the Instrument valves design requirements, pay attention to the direction of media flow valve should be consistent with the direction of the arrow mark, the connection should be firmly tight.
2), must be visually inspected prior to valve installation, the needle valve plate should be consistent with the provisions of GB 12220 of the existing national standards, "Universal Valve logo." For working pressure greater than 1.0 MPa and the role played off valve on the main pipe, the installation should be carried out before the strength and rigorous performance tests, passing behind the prospective use. Strength test, the test pressure is 1.5 times the nominal pressure, duration of not less than 5min, the valve housing, packing should be no leakage in compliance.
1), the installation position, altitude, direction and export must meet the Instrument valves design requirements, pay attention to the direction of media flow valve should be consistent with the direction of the arrow mark, the connection should be firmly tight.
2), must be visually inspected prior to valve installation, the needle valve plate should be consistent with the provisions of GB 12220 of the existing national standards, "Universal Valve logo." For working pressure greater than 1.0 MPa and the role played off valve on the main pipe, the installation should be carried out before the strength and rigorous performance tests, passing behind the prospective use. Strength test, the test pressure is 1.5 times the nominal pressure, duration of not less than 5min, the valve housing, packing should be no leakage in compliance.
2015年12月10日星期四
Stainless steel needle valve instrument measuring
Stainless steel needle valve instrument measuring pipeline system is an important part of the main shut-off valve and ball check valve, its function is to make open or cut off the pipeline pathway used.
Card sets of instrumentation valves have easy installation and removal, connections are tight, there is conducive to fire, explosion and high voltage capability, good sealing performance, etc., are power plants, oil refineries, chemical plant and instrument measuring line in an advanced connection valve. This type valve in the pipe should generally be installed horizontally.
Stainless steel needle valve sealing good, long life, even if the sealing surface is damaged, only need to replace wearing parts, you can continue to use.
Should be installed in the same direction so that the flow arrow on the valve body medium.
Card sets of instrumentation valves have easy installation and removal, connections are tight, there is conducive to fire, explosion and high voltage capability, good sealing performance, etc., are power plants, oil refineries, chemical plant and instrument measuring line in an advanced connection valve. This type valve in the pipe should generally be installed horizontally.
Stainless steel needle valve sealing good, long life, even if the sealing surface is damaged, only need to replace wearing parts, you can continue to use.
Should be installed in the same direction so that the flow arrow on the valve body medium.
2015年12月6日星期日
Instrument needle valve Works
Instrument needle valve Works
Any action of the valve is to cut off the flow. Depending on the spool, can be divided into the cut-off valves, valves, plug valves, Ball valves, butterfly valves, needle valves, etc. instrumentation needle valve spool is a very sharp cone body, as if the same needle is inserted into the valve seat, hence the name.
Needle valve shape than other types of valves that can withstand greater pressure, good sealing performance, it is generally used to seal small flow, high pressure gas or liquid medium. Needle valve shape is used in conjunction with a pressure gauge The most suitable of the general shape of the needle valve threaded connections are made. Nominal: PN2.5 PN4 PN6.4 PN16 PN32Mpa Nominal Diameter: DN5 ~ DN25 Suitable medium: oil, water and other non-corrosive gas ﹑ or corrosive media Temperature: -20 ℃ ~ + 440 ℃ -70 ℃ ~ -240 ℃ ≤540 ℃ ≤570 ℃ and other manufacturing materials: 20 # ﹑ 1Cr18Ni9Ti ﹑ ﹑ 304﹑316﹑316L 12Cr1Mov like.
Any action of the valve is to cut off the flow. Depending on the spool, can be divided into the cut-off valves, valves, plug valves, Ball valves, butterfly valves, needle valves, etc. instrumentation needle valve spool is a very sharp cone body, as if the same needle is inserted into the valve seat, hence the name.
Needle valve shape than other types of valves that can withstand greater pressure, good sealing performance, it is generally used to seal small flow, high pressure gas or liquid medium. Needle valve shape is used in conjunction with a pressure gauge The most suitable of the general shape of the needle valve threaded connections are made. Nominal: PN2.5 PN4 PN6.4 PN16 PN32Mpa Nominal Diameter: DN5 ~ DN25 Suitable medium: oil, water and other non-corrosive gas ﹑ or corrosive media Temperature: -20 ℃ ~ + 440 ℃ -70 ℃ ~ -240 ℃ ≤540 ℃ ≤570 ℃ and other manufacturing materials: 20 # ﹑ 1Cr18Ni9Ti ﹑ ﹑ 304﹑316﹑316L 12Cr1Mov like.
2015年12月2日星期三
Valve advantages
1 fluid resistance small, the drag coefficient with the same length of pipe equal.
2 has the advantages of simple structure, small volume, light weight.
3 closely reliable, current Instrument needle valve sealing surface material widely used plastic, good sealing performance, in the vacuum system has also been widely used.
4, the operation is convenient, quick open and close, from fully open to fully closed as long as the rotation of 90 DEG, facilitate remote control.
5 ball Instrumentation ball valve has the advantages of simple structure, convenient maintenance, seals are generally activities, the removal of the replacement is more convenient.
6 in the fully open or fully closed, the ball and seat sealing surface and the dielectric isolation, through the media will not cause erosion of the valve sealing surface.
The 7 is suitable for a wide range, from small diameter to a few millimeters, a few meters from the large, high vacuum high pressure can be applied.
2 has the advantages of simple structure, small volume, light weight.
3 closely reliable, current Instrument needle valve sealing surface material widely used plastic, good sealing performance, in the vacuum system has also been widely used.
4, the operation is convenient, quick open and close, from fully open to fully closed as long as the rotation of 90 DEG, facilitate remote control.
5 ball Instrumentation ball valve has the advantages of simple structure, convenient maintenance, seals are generally activities, the removal of the replacement is more convenient.
6 in the fully open or fully closed, the ball and seat sealing surface and the dielectric isolation, through the media will not cause erosion of the valve sealing surface.
The 7 is suitable for a wide range, from small diameter to a few millimeters, a few meters from the large, high vacuum high pressure can be applied.
2015年11月27日星期五
Ball valve features
One; wear resistance; because the Trunnion ball valve core and hard seal ball valve is alloy steel spray welding,
Three piece ball Instrumentation ball valve
The sealing ring is alloy steel welding, so the hard seal ball valve does not produce wear too much in the switch. (coefficient of hardness of 65-70):
Two; the sealing property is good; because the sealing hard seal ball valve is the use of artificial grinding, until the spool and the sealing ring is completely consistent to use. So his sealing performance is reliable.
Three; the switch light; because the sealing ring at the bottom of the spring and hard seal ball valve of the sealing ring and the valve core clung together, so in the pre tightening force of outside forces over the spring switch is very light.
Four; the service life is long, has been widely used in petroleum, chemical, power generation, paper, nuclear energy, aviation, rockets and other departments, as well as people's daily life.
Pneumatic ball valve has the advantages of compact structure, reliable sealing, simple structure, easy maintenance, sealing surface and spherical often in the closed state, the media can not easily be eroded, easy operation and maintenance for water, solvents, acids, and natural gas general working media, mainly used for cut off or connected tube road of medium, can also be used for the regulation and control of fluid.
Three piece ball Instrumentation ball valve
The sealing ring is alloy steel welding, so the hard seal ball valve does not produce wear too much in the switch. (coefficient of hardness of 65-70):
Two; the sealing property is good; because the sealing hard seal ball valve is the use of artificial grinding, until the spool and the sealing ring is completely consistent to use. So his sealing performance is reliable.
Three; the switch light; because the sealing ring at the bottom of the spring and hard seal ball valve of the sealing ring and the valve core clung together, so in the pre tightening force of outside forces over the spring switch is very light.
Four; the service life is long, has been widely used in petroleum, chemical, power generation, paper, nuclear energy, aviation, rockets and other departments, as well as people's daily life.
Pneumatic ball valve has the advantages of compact structure, reliable sealing, simple structure, easy maintenance, sealing surface and spherical often in the closed state, the media can not easily be eroded, easy operation and maintenance for water, solvents, acids, and natural gas general working media, mainly used for cut off or connected tube road of medium, can also be used for the regulation and control of fluid.
2015年11月24日星期二
Card sleeve needle valve to cut off or regulate flow.
FD-LOK Inconel needle valves sleeve needle-like, along the flow direction of the movement, changed the flow cross-sectional area, adjust the gas flow, is now fine-tuning of the valve requires the valve port open gradually become larger, if the maximum energy from the closed to the open continuous finely adjusted. Such a card sleeve needle valve seal PTFE sealing materials, copper seals, carbide seal; and now according to different pressures, different temperatures, using a FD-LOK Needle valve structure and corresponding seal, so that you can ensure that the valve leak does not happen in the state of work pressure, then the seal is not deformed at the appropriate temperature under such conditions, under the premise of no deformation Mifengbuyan phenomenon does not occur.
2015年11月21日星期六
Selection principles stainless steel needle valve
1, the piping systems and devices require cryogenic medium, the best selection of plus bonnet cryogenic needle valve.
2, the pipeline system FCCU refining device, you can use the lift FD-LOK inconel needle valve.
3, apparatus and piping systems of chemical systems and other corrosive acid medium, the best selection of austenitic stainless steel valve seat ring of stainless steel needle valve.
4, during the time flow regulation, to use traditional worm, pneumatic or electric with a V-shaped opening regulating needle valve.
5, city gas pipeline and natural gas, use thread connecting flange connections and FD-LOK Instrument needle valve.
2, the pipeline system FCCU refining device, you can use the lift FD-LOK inconel needle valve.
3, apparatus and piping systems of chemical systems and other corrosive acid medium, the best selection of austenitic stainless steel valve seat ring of stainless steel needle valve.
4, during the time flow regulation, to use traditional worm, pneumatic or electric with a V-shaped opening regulating needle valve.
5, city gas pipeline and natural gas, use thread connecting flange connections and FD-LOK Instrument needle valve.
2015年11月18日星期三
Corrosion method needle valve
To know preservative is very important for a product, directly affect the normal use, the FD-LOK stainless needle valves Take for instance, it is relative to the main body corrosion, the material it uses stainless steel or carbon steel . Although the method of corrosion of materials a lot of very rich, but the application can not be appropriately or a more difficult matter, because of corrosion problems are quite complicated and more difficult.
First, in the selection of the time there is great difficulty, not only consider the anti-corrosion properties, but also need to consider the ability to withstand high temperatures. Under pressure and temperature is not high, the use of non-metallic materials to make the valve body, often can be effective anti-corrosion, the outer surface of the FD-LOK Stainless steel needle valve body will be exposed to atmospheric corrosion, usually applied paint to give protection.
First, in the selection of the time there is great difficulty, not only consider the anti-corrosion properties, but also need to consider the ability to withstand high temperatures. Under pressure and temperature is not high, the use of non-metallic materials to make the valve body, often can be effective anti-corrosion, the outer surface of the FD-LOK Stainless steel needle valve body will be exposed to atmospheric corrosion, usually applied paint to give protection.
2015年11月15日星期日
Needle valve products have good performance
Good regulation FD-LOK Instrument needle valve. Under normal circumstances, the adjustment range of the needle valve is in the category of 100 to 200, and the current market is a good point adjustment range of the valve is also only reached 50.
Good flow performance needle valve. Needle valve of the flow path is used in the form of pass-through, so that the flow of the medium is no longer needed turning, largely reducing the medium may be deposited. Making it ideal for high viscosity, suspension, pulp and other unclean media sites.
Needle valve good cutting performance. A most important feature have FD-LOK high pressure needle valves is contact spherical valve and valve seat between the ramp is used in the form of line contact, thereby reducing the contact surface, further reducing the valve leak rate.
Good flow performance needle valve. Needle valve of the flow path is used in the form of pass-through, so that the flow of the medium is no longer needed turning, largely reducing the medium may be deposited. Making it ideal for high viscosity, suspension, pulp and other unclean media sites.
Needle valve good cutting performance. A most important feature have FD-LOK high pressure needle valves is contact spherical valve and valve seat between the ramp is used in the form of line contact, thereby reducing the contact surface, further reducing the valve leak rate.
2015年11月12日星期四
Situation gas needle valve
The gap between China and foreign valve industry patriarch industry is obvious, by contrast also allows us to see the shortcomings of their own technology, we can only continue research and study to narrow the gap, and ultimately to improve the situation of domestic valve industry. I'm in the FD-LOK Stainless steel needle valves industry, the industry also have to understand the market and found that there are four major integrated Gap:
1, the gap on the technological innovation capability;
2, machining gap workmanship;
3, the gap between the quality of management and equipment;
4, the gap flow management.
Next, look at the specific analysis for everyone: in innovation behind our ability to do a lot, which is a direct impact on the domestic impact of the valve stumbling block, the current domestic valve industry innovative design water products is not high, some domestic companies have some degree of research and development conditions, but R & D personnel are limited by the lack of facilities and funds, so the R & D capability and technical services relatively closed. So we want to change the status of the valve industry, only to change some of the above problems, seize the key, step by step to improve the industry's need to believe that the future of domestic FD-LOK Inconel needle valves will go in the world!
1, the gap on the technological innovation capability;
2, machining gap workmanship;
3, the gap between the quality of management and equipment;
4, the gap flow management.
Next, look at the specific analysis for everyone: in innovation behind our ability to do a lot, which is a direct impact on the domestic impact of the valve stumbling block, the current domestic valve industry innovative design water products is not high, some domestic companies have some degree of research and development conditions, but R & D personnel are limited by the lack of facilities and funds, so the R & D capability and technical services relatively closed. So we want to change the status of the valve industry, only to change some of the above problems, seize the key, step by step to improve the industry's need to believe that the future of domestic FD-LOK Inconel needle valves will go in the world!
2015年2月27日星期五
Stainless steel needle selection principles
1 , the pipeline system and cryogenic medium , should use plus low bonnet needle valve .
2 , the pipeline system FCCU refinery unit , optional Needle valve lift rod .
3 , fixtures and piping systems , such as acid-base chemical systems in corrosive media , should use austenitic stainless steel , Teflon seat ring in (Stainless steel needle valve) .
4 , metallurgical systems, piping systems or devices on the power system , petrochemical plants , urban heating systems in high-temperature medium , the choice of metal to metal seal Needle valves .
5, the need for flow regulation , the choice of the worm gear , pneumatic or electric adjustment with a V -shaped opening needle valve .
6 , transmission mains oil, natural gas , it is necessary to clean the pipeline , buried in the ground and the need , use full bore , all-welded construction needle valve ; buried in the ground , choose full bore welded or flanged connections the ball valve.
7 , pipelines and storage facilities for refined oil products , the choice of needle valve flange connection .
8 , city gas and natural gas pipeline , the choice of the needle valve flange and the threaded connection .
9 , metallurgical oxygen pipeline system , should use rigorous degreasing treatment , needle valve flange connection .
2 , the pipeline system FCCU refinery unit , optional Needle valve lift rod .
3 , fixtures and piping systems , such as acid-base chemical systems in corrosive media , should use austenitic stainless steel , Teflon seat ring in (Stainless steel needle valve) .
4 , metallurgical systems, piping systems or devices on the power system , petrochemical plants , urban heating systems in high-temperature medium , the choice of metal to metal seal Needle valves .
5, the need for flow regulation , the choice of the worm gear , pneumatic or electric adjustment with a V -shaped opening needle valve .
6 , transmission mains oil, natural gas , it is necessary to clean the pipeline , buried in the ground and the need , use full bore , all-welded construction needle valve ; buried in the ground , choose full bore welded or flanged connections the ball valve.
7 , pipelines and storage facilities for refined oil products , the choice of needle valve flange connection .
8 , city gas and natural gas pipeline , the choice of the needle valve flange and the threaded connection .
9 , metallurgical oxygen pipeline system , should use rigorous degreasing treatment , needle valve flange connection .
2015年2月24日星期二
Profile stainless steel needle valve
Stainless steel needle valve is the instrument to measure an important part of the piping system , the main shut-off valve and ball valve, its function is to be used to turn on or off the pipeline path .
Card sets with easy installation and removal Instrument valves , connections are tight , there is conducive to fire , explosion and high voltage capability , good sealing performance, etc., are power plants, oil refineries, chemical plant piping and instrumentation to measure an advanced connection valve. This type valve in the pipe should generally be installed horizontally.
(Stainless steel needle valve) sealing a good , long life, even after the sealing surface is damaged, only need to replace wearing parts , you can continue to use.
Should be installed so that the flow is consistent with the direction of the arrow on the valve body medium .
1 , needle valves standards , needle valves with easy installation and removal , needle valve connections are tight , the needle valve is conducive to fire , explosion and needle valve high pressure capability . Needle valve sealing performance advantages of a good valve power plant , oil refinery, chemical plant piping and instrumentation to measure connection in an advanced way . Good sealing needle valve , needle valve long service life , even after the needle valve sealing surface is damaged , needle valves only need to replace wearing parts , needle valves can continue to use. Needle valve should be installed so that the flow is consistent with the direction of the arrow on the valve body medium . Needle valve is a valve can be precisely adjusted broader purposes such as flame cutting with the cutting from the flame temperature adjustment knob is needle valves, instrumentation needle valve instrument measuring the piping system is an important part of the main needle valve there are shut-off valves and ball valves , needle valves whose function is to be used to turn on or off the pipeline path .
(Stainless steel needle valve) base on self-designed structure , is currently the most popular new generation valve.
First, the body 's anti-corrosion, mainly correct selection of materials . Although corrosion data is very rich, but whether the election was appropriate or not an easy thing , because the corrosion problem is very complex. Choose body material difficulties, lies not only consider the corrosion problem , but must consider the ability to withstand temperature , whether economically reasonable , is it easy to buy and other factors.
Card sets with easy installation and removal Instrument valves , connections are tight , there is conducive to fire , explosion and high voltage capability , good sealing performance, etc., are power plants, oil refineries, chemical plant piping and instrumentation to measure an advanced connection valve. This type valve in the pipe should generally be installed horizontally.
(Stainless steel needle valve) sealing a good , long life, even after the sealing surface is damaged, only need to replace wearing parts , you can continue to use.
Should be installed so that the flow is consistent with the direction of the arrow on the valve body medium .
1 , needle valves standards , needle valves with easy installation and removal , needle valve connections are tight , the needle valve is conducive to fire , explosion and needle valve high pressure capability . Needle valve sealing performance advantages of a good valve power plant , oil refinery, chemical plant piping and instrumentation to measure connection in an advanced way . Good sealing needle valve , needle valve long service life , even after the needle valve sealing surface is damaged , needle valves only need to replace wearing parts , needle valves can continue to use. Needle valve should be installed so that the flow is consistent with the direction of the arrow on the valve body medium . Needle valve is a valve can be precisely adjusted broader purposes such as flame cutting with the cutting from the flame temperature adjustment knob is needle valves, instrumentation needle valve instrument measuring the piping system is an important part of the main needle valve there are shut-off valves and ball valves , needle valves whose function is to be used to turn on or off the pipeline path .
(Stainless steel needle valve) base on self-designed structure , is currently the most popular new generation valve.
First, the body 's anti-corrosion, mainly correct selection of materials . Although corrosion data is very rich, but whether the election was appropriate or not an easy thing , because the corrosion problem is very complex. Choose body material difficulties, lies not only consider the corrosion problem , but must consider the ability to withstand temperature , whether economically reasonable , is it easy to buy and other factors.
2015年2月21日星期六
The advantages and disadvantages of the fixed ball valve:
Advantage
1, double block and emission features: the fixed ball Stainless steel needle valve seat by spring preload variable, whether the valve is fully open or fully closed state, on the downstream side of the seat so that the fluid is blocked, the body cavity retentate through the discharge valve discharge.
2, automatic pressure relief feature: the valve body cavity retention medium caused by temperature rise when an abnormal pressure, without going through the safety Instrumentation ball valves, and the valve seat can only function of pressure relief automatically, which ensure that the safety valve in the delivery of liquid medium is very important.
3, fire safety structure: fire safety valve functions are available, the design, manufacture were to follow API 607 and API 6FA specifications.
Disadvantages
1, sealing grease emergency ambulance: as the foreign media or the fire caused the valve seat sealing failure, valve grease and grease gun provides a fast connection, import pump conveniently and quickly injected into the valve seat seal grease sealing parts, ease leak.
2, reliable stem sealing and low operating torque: in addition to setting the standard sealing ring, the packing gland has also set up O type sealing ring, double seals to ensure the reliability of the valve stem seals; addition of graphite filler and seal fat into the fire so that the valve stem leakage to a minimum. Stem bearings and thrust bearings so that the valve is easy to operate.
3, full size or reduced diameter: according to the selection of full size or necking structure needs. Full bore valve flow aperture consistent with the pipeline diameter, for pipeline cleaning.
4, the stem can be extended: according to the requirement of the installation or operation, the valve stem can be lengthened. Extension rod ball, especially suitable for urban gas pipeline laying occasions need buried. Long stem size according to customer needs to be determined.
5, the operation is flexible: the use of a small friction coefficient and good self lubrication of the valve seat and stem bearing, greatly reducing the valve operating torque. Therefore, even if not provided in the case of grease, but also the long-term flexibly operate on valve.
1, double block and emission features: the fixed ball Stainless steel needle valve seat by spring preload variable, whether the valve is fully open or fully closed state, on the downstream side of the seat so that the fluid is blocked, the body cavity retentate through the discharge valve discharge.
2, automatic pressure relief feature: the valve body cavity retention medium caused by temperature rise when an abnormal pressure, without going through the safety Instrumentation ball valves, and the valve seat can only function of pressure relief automatically, which ensure that the safety valve in the delivery of liquid medium is very important.
3, fire safety structure: fire safety valve functions are available, the design, manufacture were to follow API 607 and API 6FA specifications.
Disadvantages
1, sealing grease emergency ambulance: as the foreign media or the fire caused the valve seat sealing failure, valve grease and grease gun provides a fast connection, import pump conveniently and quickly injected into the valve seat seal grease sealing parts, ease leak.
2, reliable stem sealing and low operating torque: in addition to setting the standard sealing ring, the packing gland has also set up O type sealing ring, double seals to ensure the reliability of the valve stem seals; addition of graphite filler and seal fat into the fire so that the valve stem leakage to a minimum. Stem bearings and thrust bearings so that the valve is easy to operate.
3, full size or reduced diameter: according to the selection of full size or necking structure needs. Full bore valve flow aperture consistent with the pipeline diameter, for pipeline cleaning.
4, the stem can be extended: according to the requirement of the installation or operation, the valve stem can be lengthened. Extension rod ball, especially suitable for urban gas pipeline laying occasions need buried. Long stem size according to customer needs to be determined.
5, the operation is flexible: the use of a small friction coefficient and good self lubrication of the valve seat and stem bearing, greatly reducing the valve operating torque. Therefore, even if not provided in the case of grease, but also the long-term flexibly operate on valve.
2015年2月18日星期三
The performance advantage of the fixed ball valve:
1, the operation is labor-saving: ball support, composed of upper and lower bearings to reduce friction, due to the elimination of the great seal load inlet pressure to promote the ball with the sealing seat formation caused by excessive torque.
2, reliable sealing performance: PTFE unisexual material sealing ring is embedded in the stainless steel Instrument needle valve seat, metal seat end with the spring to ensure adequate pre tightening force of sealing ring, valve sealing surface is abraded during use, in the spring under the action of the valve to ensure good sealing performance.
3, structural fire protection: to prevent the sudden appearance of heat or fire, burn the PTFE sealing ring, large leak occurred, and contribute to the fire, in the ball and Trunnion ball valve seat sealing ring is arranged between the fire, when burned in the ring, under the action of the spring force, will quickly push the ball valve seat sealing ring, the formation of metal and metal seal, to a certain degree of sealing effect. Fire test to meet the requirements of APl6FA and APl607 standard.
4, automatic pressure relief feature: when the medium pressure cavity inside the valve is much higher than the pre] spring force, the seat back from the ball, to the effect of automatic pressure relief, pressure relief valve seat after automatic complex
5, a drain line: all set vent valve body, valve seat can check whether leakage occurs in the work, the valve is fully open or fully closed, remove the pressure in the chamber, can be directly replace packing; can cavity left in emissions, reduce pollution medium on the valve.
2, reliable sealing performance: PTFE unisexual material sealing ring is embedded in the stainless steel Instrument needle valve seat, metal seat end with the spring to ensure adequate pre tightening force of sealing ring, valve sealing surface is abraded during use, in the spring under the action of the valve to ensure good sealing performance.
3, structural fire protection: to prevent the sudden appearance of heat or fire, burn the PTFE sealing ring, large leak occurred, and contribute to the fire, in the ball and Trunnion ball valve seat sealing ring is arranged between the fire, when burned in the ring, under the action of the spring force, will quickly push the ball valve seat sealing ring, the formation of metal and metal seal, to a certain degree of sealing effect. Fire test to meet the requirements of APl6FA and APl607 standard.
4, automatic pressure relief feature: when the medium pressure cavity inside the valve is much higher than the pre] spring force, the seat back from the ball, to the effect of automatic pressure relief, pressure relief valve seat after automatic complex
5, a drain line: all set vent valve body, valve seat can check whether leakage occurs in the work, the valve is fully open or fully closed, remove the pressure in the chamber, can be directly replace packing; can cavity left in emissions, reduce pollution medium on the valve.
2015年2月15日星期日
Male female connection line
Male female connection line is very simple, is a connecting line of a male connector and a female head Male connector component, known as the male female connection line. Male female connection line we common is DC line, public bus terminal, used for LED lamp and the driving power supply connection. DC public bus is injection molding, DC is the head of the welding is good, then the injection can be processed, public bus terminal, the terminal is cold pressed online material, and then inserted in the male and female connector inside, has become a public bus terminal. The public bus is convenient repair and maintenance, such as lighting a bad driver, a driver can directly, no need of welding.
2015年2月12日星期四
Valve
The Check valve is in fluid system, a device used to control the direction of the fluid flow, pressure, is to make the piping and equipment within the media (liquid, gas, powder) device for controlling the flow of energy flow or stop and the.
The Instrument valves is a pipeline control unit of fluid delivery system, which is used to change the channel section and flow direction of medium, with diversion, cut-off, throttling, check, diversion or overflow relief functions. For fluid control valves, valve from the simple to the extremely different kinds of valve control system used in complex, its many varieties and specifications, the valve nominal diameter pipeline industry from large to tiny instrument valve diameter up to 10m valve. Can be used for the control of water, steam, oil, gas, mud, all kinds of corrosive medium, the liquid metal and radioactive fluids and other types of fluid flow, the valve working pressure is from 0.0013MPa to 1000MPa of ultra high pressure, working temperature from ultra low temperature to high temperature of 1430 DEG C -270 C.
The control valve can use a variety of transmission, such as manual, electric, hydraulic, pneumatic, pneumatic turbine, electromagnetic, electromagnetic hydraulic, electric hydraulic, pneumatic and hydraulic, gear, bevel gear drive; in pressure, temperature or other forms of sensor signals under the action, according to the requirements, or not depends on the sensing signal and a simple open or closed, the valve to rely on drive or automatic mechanism to make the opening and closing parts for lifting, sliding, rotating or turning motion, so as to change the size of the flow area to achieve the control function.
The Instrument valves is a pipeline control unit of fluid delivery system, which is used to change the channel section and flow direction of medium, with diversion, cut-off, throttling, check, diversion or overflow relief functions. For fluid control valves, valve from the simple to the extremely different kinds of valve control system used in complex, its many varieties and specifications, the valve nominal diameter pipeline industry from large to tiny instrument valve diameter up to 10m valve. Can be used for the control of water, steam, oil, gas, mud, all kinds of corrosive medium, the liquid metal and radioactive fluids and other types of fluid flow, the valve working pressure is from 0.0013MPa to 1000MPa of ultra high pressure, working temperature from ultra low temperature to high temperature of 1430 DEG C -270 C.
The control valve can use a variety of transmission, such as manual, electric, hydraulic, pneumatic, pneumatic turbine, electromagnetic, electromagnetic hydraulic, electric hydraulic, pneumatic and hydraulic, gear, bevel gear drive; in pressure, temperature or other forms of sensor signals under the action, according to the requirements, or not depends on the sensing signal and a simple open or closed, the valve to rely on drive or automatic mechanism to make the opening and closing parts for lifting, sliding, rotating or turning motion, so as to change the size of the flow area to achieve the control function.
2015年2月9日星期一
Valve advantages
1 fluid resistance small, the drag coefficient with the same length of pipe equal.
2 has the advantages of simple structure, small volume, light weight.
3 closely reliable, current High pressure needle valve sealing surface material widely used plastic, good sealing performance, in the vacuum system has also been widely used.
4, the operation is convenient, quick open and close, from fully open to fully closed as long as the rotation of 90 DEG, facilitate remote control.
5 ball Valve manifolds has the advantages of simple structure, convenient maintenance, seals are generally activities, the removal of the replacement is more convenient.
6 in the fully open or fully closed, the ball and seat sealing surface and the dielectric isolation, through the media will not cause erosion of the valve sealing surface.
The 7 is suitable for a wide range, from small diameter to a few millimeters, a few meters from the large, high vacuum high pressure can be applied.
2 has the advantages of simple structure, small volume, light weight.
3 closely reliable, current High pressure needle valve sealing surface material widely used plastic, good sealing performance, in the vacuum system has also been widely used.
4, the operation is convenient, quick open and close, from fully open to fully closed as long as the rotation of 90 DEG, facilitate remote control.
5 ball Valve manifolds has the advantages of simple structure, convenient maintenance, seals are generally activities, the removal of the replacement is more convenient.
6 in the fully open or fully closed, the ball and seat sealing surface and the dielectric isolation, through the media will not cause erosion of the valve sealing surface.
The 7 is suitable for a wide range, from small diameter to a few millimeters, a few meters from the large, high vacuum high pressure can be applied.
2015年2月6日星期五
Ball valve features
One; wear resistance; because the valve core and hard seal ball Needle valve is alloy steel spray welding,
Three piece ball valve
The sealing ring is alloy steel welding, so the hard seal ball Instrument valve does not produce wear too much in the switch. (coefficient of hardness of 65-70):
Two; the sealing property is good; because the sealing hard seal ball valve is the use of artificial grinding, until the spool and the sealing ring is completely consistent to use. So his sealing performance is reliable.
Three; the switch light; because the sealing ring at the bottom of the spring and hard seal ball valve of the sealing ring and the valve core clung together, so in the pre tightening force of outside forces over the spring switch is very light.
Four; the service life is long, has been widely used in petroleum, chemical, power generation, paper, nuclear energy, aviation, rockets and other departments, as well as people's daily life.
Pneumatic ball valve has the advantages of compact structure, reliable sealing, simple structure, easy maintenance, sealing surface and spherical often in the closed state, the media can not easily be eroded, easy operation and maintenance for water, solvents, acids, and natural gas general working media, mainly used for cut off or connected tube road of medium, can also be used for the regulation and control of fluid.
Three piece ball valve
The sealing ring is alloy steel welding, so the hard seal ball Instrument valve does not produce wear too much in the switch. (coefficient of hardness of 65-70):
Two; the sealing property is good; because the sealing hard seal ball valve is the use of artificial grinding, until the spool and the sealing ring is completely consistent to use. So his sealing performance is reliable.
Three; the switch light; because the sealing ring at the bottom of the spring and hard seal ball valve of the sealing ring and the valve core clung together, so in the pre tightening force of outside forces over the spring switch is very light.
Four; the service life is long, has been widely used in petroleum, chemical, power generation, paper, nuclear energy, aviation, rockets and other departments, as well as people's daily life.
Pneumatic ball valve has the advantages of compact structure, reliable sealing, simple structure, easy maintenance, sealing surface and spherical often in the closed state, the media can not easily be eroded, easy operation and maintenance for water, solvents, acids, and natural gas general working media, mainly used for cut off or connected tube road of medium, can also be used for the regulation and control of fluid.
2015年2月3日星期二
Globe valve
Ball Valve manifold driven by the stem, and around the valve axis rotate valve. Can also be used to regulate and control fluid, strong shear force between the metal seat which seal V type ball Instrument valves of the V type ball core and hard surfacing alloy, especially suitable for containing fiber, small solid particles and other media. Switch and multi way valve in the pipe can flow, diversion, and flows to the flexible control of media, but also to turn off any channel and the other two channels connected. The valve should be installed in the pipeline in the general level of. Valve classification: pneumatic valve, electric valve, manual valve.
2015年1月28日星期三
Conditions Instrument needle valve inspection
Instrument needle valve is a simulation test in the normal state. This state should be able to cover all water department environment. Dynamic test valve executive function Another very important point is that the test voltage, what kind of voltage the most appropriate? High pressure ball valve Smart meter in every one has a same function, that is, when the battery voltage is below the set value, the microcontroller will command the valve closing function is activated,Valve manifolds when the battery voltage is the lowest in the smart meter voltage Instrument needle valve, also that is, the final action is the lowest setting off valve in the battery voltage. The task of the truth is by reversing valve to the valve dredge or occlusion. Instrument needle valve switch is lightweight, small size, can be made very large caliber, reliable sealing, simple structure, Instrument needle valves convenient maintenance, regular spherical surface and seal in the closed condition, can not easily be eroded media, in all sectors lost universal use.
2015年1月19日星期一
Needle valve selection principles
1 , the pipeline system and cryogenic medium , should use plus low bonnet needle valve .
2 , the pipeline system FCCU refinery unit , optional Needle valves lift rod .
3 , fixtures and piping systems , such as acid-base chemical systems in corrosive media , should use austenitic stainless steel , Teflon seat ring in stainless steel needle valve .
4 , metallurgical systems, piping systems or devices on the power system , petrochemical plants , urban heating systems in high-temperature medium , the choice of metal to metal seal needle valve .
5, the need for flow regulation , the choice of the worm gear , pneumatic or electric adjustment with a V -shaped opening needle valve . 6 , transmission mains oil, natural gas , it is necessary to clean the pipeline , buried in the ground and the need , use full bore , all-welded construction needle valve ; buried in the ground , choose full bore welded or flanged connections the ball valve.
7 , pipelines and storage facilities for refined oil products , the choice of needle valve flange connection .
8 , city gas and natural gas pipeline , the choice of the Needle valve flange and the threaded connection .
9 , metallurgical oxygen pipeline system , should use rigorous degreasing treatment , needle valve flange connection .
2 , the pipeline system FCCU refinery unit , optional Needle valves lift rod .
3 , fixtures and piping systems , such as acid-base chemical systems in corrosive media , should use austenitic stainless steel , Teflon seat ring in stainless steel needle valve .
4 , metallurgical systems, piping systems or devices on the power system , petrochemical plants , urban heating systems in high-temperature medium , the choice of metal to metal seal needle valve .
5, the need for flow regulation , the choice of the worm gear , pneumatic or electric adjustment with a V -shaped opening needle valve . 6 , transmission mains oil, natural gas , it is necessary to clean the pipeline , buried in the ground and the need , use full bore , all-welded construction needle valve ; buried in the ground , choose full bore welded or flanged connections the ball valve.
7 , pipelines and storage facilities for refined oil products , the choice of needle valve flange connection .
8 , city gas and natural gas pipeline , the choice of the Needle valve flange and the threaded connection .
9 , metallurgical oxygen pipeline system , should use rigorous degreasing treatment , needle valve flange connection .
2015年1月16日星期五
Instrumentation needle valve Product Description
Instrument measuring Instrument needle valve is an important part of the piping system, the main shut-off valve and ball valve, its function is to be used to turn on or off the pipeline path. Card sets with easy installation and removal instrument valves, connections are tight, there is conducive to fire, explosion and high voltage capability, good sealing performance, etc., are power plants, oil refineries, chemical plant piping and instrumentation to measure an advanced connection valve. Needle shut-off valve sealing good, long life, even after the sealing surface is damaged, only need to replace wearing parts, you can continue to use.
2015年1月13日星期二
Instrumentation needle valve
Instrument needle valves, instrument measuring the piping system is an important part of the main shut-off valve and ball valve, mainly used for cutting the pipe open or access available. Installation Notes: Valve must be visually inspected prior to installation, the valve plate should comply with existing national standards, "Universal Valve logo" GB 12220's. The outer surface of the instrument needle valve body also affected by atmospheric corrosion, general steel materials to paint to protect.
2015年1月10日星期六
The classification of ball valve
One, floating ball valve
Ball High pressure needle valve ball is floating in the medium under pressure, can produce some displacement of the sphere, and pressed in the export side of the sealing surface, to ensure that the exit seal. Floating ball valve structure is simple, good sealing, but the ball under the load of all media work to export ring, so to consider the ring material can withstand the work load of the media sphere. This structure, widely used in low-pressure Stainless steel needle valve
Two, fixed ball valve
The ball valve is fixed, no movement after compression. Fixed with a floating ball valve ball valve seat, by the media pressure, the valve seat have a mobile, so that the sealing ring is pressed on the sphere, in order to ensure the sealing. Usually with the ball in the upper and lower shaft with bearings, operating torque, suitable for high pressure and large diameter of the valve. In order to reduce the valve operating torque and increase the reliability of the seal, valve seal has emerged in recent years, both pressure lubricating oil special note in the sealing surface, to form a layer of oil film, which enhances the sealing, and reduce operating torque, more suitable for large-diameter high-pressure valve.
Three, elastic ball valve
The ball valve is flexible. Ball and valve seat rings are made of metal materials, sealing pressure than the large, rely on the media itself can not seal the pressure has reached the requirements must be imposed by external forces. This valve is suitable for high temperature and high pressure medium. Elastic sphere is a flexible open slot in the sphere of the bottom wall, and get flexible. When the closed channel, with the stem of the wedge-shaped head to open up the ball with the valve seat to seal compression. In the rotating sphere before loose wedge head, ball the subsequent restoration of the original prototype, so that a small gap between the ball and the valve seat sealing surface can reduce friction and operating torque.
Ball High pressure needle valve ball is floating in the medium under pressure, can produce some displacement of the sphere, and pressed in the export side of the sealing surface, to ensure that the exit seal. Floating ball valve structure is simple, good sealing, but the ball under the load of all media work to export ring, so to consider the ring material can withstand the work load of the media sphere. This structure, widely used in low-pressure Stainless steel needle valve
Two, fixed ball valve
The ball valve is fixed, no movement after compression. Fixed with a floating ball valve ball valve seat, by the media pressure, the valve seat have a mobile, so that the sealing ring is pressed on the sphere, in order to ensure the sealing. Usually with the ball in the upper and lower shaft with bearings, operating torque, suitable for high pressure and large diameter of the valve. In order to reduce the valve operating torque and increase the reliability of the seal, valve seal has emerged in recent years, both pressure lubricating oil special note in the sealing surface, to form a layer of oil film, which enhances the sealing, and reduce operating torque, more suitable for large-diameter high-pressure valve.
Three, elastic ball valve
The ball valve is flexible. Ball and valve seat rings are made of metal materials, sealing pressure than the large, rely on the media itself can not seal the pressure has reached the requirements must be imposed by external forces. This valve is suitable for high temperature and high pressure medium. Elastic sphere is a flexible open slot in the sphere of the bottom wall, and get flexible. When the closed channel, with the stem of the wedge-shaped head to open up the ball with the valve seat to seal compression. In the rotating sphere before loose wedge head, ball the subsequent restoration of the original prototype, so that a small gap between the ball and the valve seat sealing surface can reduce friction and operating torque.
2015年1月7日星期三
Trunnion ball valve using the principles of
Trunnion ball valve is guaranteed by the pressure poorly. Flat stack valve to valve flatness and smoothness requirements friction plane quite high, and the requirements for the use of materials Instrument needle valve also have high demands. To solve these problems, flat lamination stack valve using a ceramic substrate under the topsheet other using a high-strength wear-resistant material, in full accordance with the principles of chemical mechanical seal manufacturing and processing, both to ensure a reasonable contact surface, and ensure the minimum coefficient of friction. Trunnion ball valve has emerged cause Valve manifolds quality problems due to prolonged blockage of the pilot hole, the pressure relief valve stem causing the valve stem is stuck adsorption of iron particles and other issues, through the use of market information and feedback, developers have learned Trunnion ball valve actuators Division is currently unsuitable water quality of water use. Thus, the developers turned to the ball and flat stack valves. Now use the ball a little more.
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