Globe valve

Ball valve driven by the stem, and around the Trunnion ball valves axis rotate valve. Can also be used to regulate and control fluid, strong shear force between the metal seat which seal V type ball Instrumentation ball valve 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.

Instrument needle valve structure principle of

Key Instrument needle valve seal structure is due to the way the valve drive using triggered, if the valve actuator seal structure to improve the way you can solve the leakage problem and lead to Double ferrule fitting the loss of technical issues valve actuator functions. Mechanical seal is a dynamic seal, widely used in the chemical industry. Instrument needle valve structure is simple, small size, resistance to fluid flow is also small, problems are open or closed too quickly, it will occur in the pipeline water hammer (water flow rate in the pipe when the pressure Instrument valve manifolds is reduced suddenly change). Instrument needle valve and thus should not be taken on the backbone tube valve can be used in the dry end of the branch pipe, or for wash-use, flushing sewage good consequences.

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.

Needle valve structure analysis

Needle valve is solid move after pressure does not occur. With a floating ball valve are firmly seat after by media pressure, move the seat occurs, the seal is pressed onto the ball, Needle valve in order to protect the seal. Weekdays with the ball, the lower shaft with bearings, manipulating small torque, useful in high-pressure valve with large diameter. Needle valve characteristic is horizontal, and the flow is upward mobility, so the valve is closed the water pressure on the valve play a significant role in the film is, the higher the pressure the better sealing performance. Needle valve when the valve is working as a plane rotation, need to overcome the friction coefficient between the valves, Instrument needle valve and the impact it's not as big hydraulic valve. But to overcome the friction in the water under the lamination pressure. Was friction between the laminations through practical experiment, several Corfu little force increases.

Instrument needle valve in terms of energy savings

Design and manufacture of valves, to minimize the valve on the flow resistance of the medium. Opening and closing force and closing torque is the valve open or closed by force or torque to be applied. Close the valve, the need to open and close between the two pieces with the fat seat sealing surface seal formed between certain specific pressure, but also to overcome between the stem and the packing nut thread between the stem and the stem end bearing at and other friction parts of the friction, Instrument needle valve and therefore must apply the closing force and closing moments, the valve in the opening and closing process, the need to stop the force and the opening and closing moments of change, and its maximum is close to the final instant or open the initial transient. Instrument needle valve design and manufacture of valves should strive to reduce the closing force and closing moments. Hoisting speed is used to open or close the valve to complete a time of action required to represent. Valves open and close speed generally no strict requirements, but some conditions have special requirements for opening and closing speed,5 way manifolds if the prompt to open or close, to prevent accidents, and some require slow shut down to prevent water hammer, etc., this should be considered in the selection of valve type. This refers to the valve for the medium parameters change, and make the appropriate degree of sensitivity. For the throttle valve, regulating valve is used to adjust the valves and valve medium parameters, such as valves trap with a specific function, its functional sensitivity and reliability are very important technical performance indicators. Life represents the durability of the valve, the valve is an important performance indicators, and has great economic significance. Usually able to guarantee the number of seals required to open and close said, can also be used to indicate the use of time. Instrument measuring instrument needle valve is an important part of the piping system, the main shut-off valve and ball valve, its function is turned on or off for pipeline access use.