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.
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