Classification by purpose and role:
Cut off valve is mainly used for cut off or connected media stream. Including gate valve, globe valve, diaphragm valves, ball valves, plug valves, butterfly valve, piston valve, ball plug valve, needle valve, glue stick instrument.
Regulating valves primarily for regulating the media flow and pressure. Including control valve, throttle, valve and so on.
Check class is used to prevent the media back. Including valve structure.
Shunt valve for the separation, distribution, or mixed media.glue gun Including the distribution of various structures such as valves and steam traps.
Overpressure safety valve when the class is used to medium security. Including all types of safety valve.
Classification by main parameters
(A) of the pressure Category:
Vacuum valve working pressure less than standard atmospheric pressure of the valve.
Low-pressure valve of the valve, PN is less than 1.6MPa.
Pressure valve in the valve nominal pressure PN2.5 ~ 6.4MPa.
Nominal PN10.0 ~ 80.0MPa pressure valve of the valve.
High pressure valve of the valve, PN greater than 100MPa.
(B) the medium temperature Category:
T high temperature valve the valve is greater than 450C.
The temperature is less than t less than 450C 120C valve valve.
Valve-40C ambient temperature is less than t less than the 120C of the valve.
Low temperature valve-100C less than t less than-40C of the valve.
Cryogenic valve valve t less than-100C.
(C) of the body material by Category:
Non-metallic material valve: the valve, such as ceramics, glass and steel valves, plastic valves.
Metal valves: such as copper alloy valves, aluminum valves, lead alloy valves, titanium valves, Monel valves.
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 not only by the principle of division according to the structure and function, is the international, the most commonly used classification methods. General sub-gate valve, globe valve, throttle, instrument valves, piston valves, diaphragm valves, plug valves, ball valves, butterfly valves, check valves, pressure reducing valves, steam trap, control valve, foot valve, filters, drain valve and so on.