According to temperature and pressure pneumatic valve

choose pneumatic valve in addition to consider the corrosion medium, flow characteristic, connection form, medium temperature and pressure are important parameters.
。 The use of pneumatic valve temperature
the use of pneumatic valve temperature is determined by the material of manufacturing pneumatic valves. Pneumatic valves are commonly used materials in the use of temperature are as follows:
use temperature for gray cast iron pneumatic valves - ~ ℃;
malleable iron using pneumatic valve temperature for - ~ ℃;
pneumatic valve temperature for ductile iron - ~ ℃;
high nickel cast iron pneumatic valve highest use temperature for ℃;
pneumatic valve temperature for carbon steel - ~ ℃, in JB/T - Standard recommended temperature t < ℃;
CrMo, alloy steel, pneumatic valve highest use temperature for ℃;
CrMoVA, alloy steel, pneumatic valve highest use temperature for ℃;
CrNiTi, CrNiMoTi stainless steel pneumatic valve temperature for - ~ ℃;
use temperature for copper alloy pneumatic valves - ~ ℃;
plastic pneumatic valve highest use temperature:
nylon ℃;
chlorinated polyether ℃;
polyvinyl chloride (PVC) as the ℃;
polytrifluorochloroethylene - ~ ℃;
ptfe - ~ ℃.
rubber diaphragm pneumatic valve, due to the different types of rubber, its temperature varies;
natural rubber for ℃;
nitrile rubber, neoprene, ℃;
fluorine rubber ℃;
pneumatic valve lining rubber, plastic, rubber, plastic and heat-resistant properties shall prevail.
ceramic pneumatic valves, because of its poor heat resistance urgent degeneration, commonly used in ℃ under working condition. Recently appeared a kind of super performance ceramic pneumatic valve, power ℃ under high temperature.
glass pneumatic valves, heat resistance degeneration is poor, is generally used in ℃ under working condition.
enamel pneumatic valves, heat resistance performance is limited by a sealing ring material, the highest temperature shall not exceed the ℃.
。 Pneumatic valve used pressure
the use of pneumatic valve pressure is determined by manufacturing pneumatic valve material.
maximum nominal pressure of the pneumatic valve allows the use of gray cast iron MPa;
malleable iron maximum nominal pressure of the pneumatic valve allows you to use. MPa；
nodular cast iron maximum nominal pressure of the pneumatic valve allows you to use. MPa；
copper alloy maximum nominal pressure of the pneumatic valve allows you to use. MPa；
maximum nominal pressure of the pneumatic valve allows the use of titanium alloy. MPa；
maximum nominal pressure of the pneumatic valve allows the use of carbon steel MPa;
maximum nominal pressure of the pneumatic valve allows the use of alloy steel MPa;
stainless steel maximum nominal pressure of the pneumatic valve allows the use of MPa;
maximum nominal pressure of the pneumatic valve allows the use of plastic. MPa；
ceramics, glass, enamel maximum nominal pressure of the pneumatic valve allows you to use. MPa；
maximum nominal pressure of the pneumatic valve allows the use of glass fiber reinforced plastic. MPa；
。 The relationship between the temperature and pressure pneumatic valve
use pneumatic valve temperature and pressure has certain internal relation, and influence each other. Among them, the temperature is the main factor of influence and certain pressure pneumatic valves only adapted to a certain temperature range, pneumatic valve temperature change can affect the pneumatic valve with pressure.
for example: a carbon steel for MPa nominal pressure of the pneumatic valve, when the working temperature of the medium for ℃, the maximum working pressure P for MPa; When the working temperature of the medium is ℃, the maximum working pressure for P. MP； When the working temperature of the medium is ℃, the maximum working pressure for P. MPa。