Different valves and their respective advantages and disadvantages of the application of the occasions

By end-use and role of classification



Category cut-off valve for cutting off or connected to the main stream media. Including the valve, the cut-off valve, valve, ball valves, plug valves, disc valves, plunger valves, ball plug valve, needle valve, such as instrumentation.



Main control valve for regulating the flow of media, pressure and so on. Including control valve, throttle valve, relief valve and so on.



Media type check valve for preventing backflow. Including the structure of the non-return valve.



Shunt valve used to separate categories, distribution or mixed media. Including the distribution of a variety of structures such as valves and traps.



Type safety valve for the media at the time of overpressure protection. Including all types of safety valve.



Classification by main parameters



(A) pressure classification



Vacuum pressure valve of the valve is below standard atmospheric pressure.



Nominal pressure PN low-pressure valve of the valve is less than 1.6MPa.



Nominal pressure valve in the pressure of the valve PN2.5 ~ 6.4MPa.



Nominal pressure valve high pressure valve PN10.0 ~ 80.0MPa.



Nominal pressure PN ultra-high pressure valve of the valve is greater than 100MPa.



(B) medium temperature classification



High temperature valve valve 450C is greater than t.



120C temperature relief valve in less than t less than the valve 450C.



Valve-40C ambient temperature is less than t less than the valve 120C.



Low-temperature valve-100C less than t less than-40C of the valve.



Ultra-low temperature valve t less than-100C of the valve.



(C) classification according to body material



Valve non-metallic materials: such as ceramic valves, glass fiber reinforced plastic valves, plastic valves.



Valve metal materials: copper alloy, such as valves, valve aluminum alloy, lead alloy valves, titanium valves, valve monel alloy



Cast iron valves, carbon steel valves, cast steel valves, low-alloy steel valves, high alloy steel valves.



Metal valve body lining: lining of lead, such as valves, plastic lined valves, valves lining enamel.



General Classification



This classification is based on the principle of the role of structure and by division, is the international and domestic classification of the most commonly used. General sub-valve, the cut-off valve, throttle, instrument valve, plunger valve, valve, plug valves, ball valve, butterfly valve, check valve, relief valve safety valve, steam trap, control valve, bottom valve, filters, valves, such as sewage. 

  

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