Primary type pneumatic valve first step and matters needing attention of application

mainly according to the characteristic of medium, process parameters, using pneumatic valve type requires primary.
. Dielectric properties should be clear belongs to one of the following
a. General fluid;
b. High viscosity, containing suspended solids, fiber and other fluid;
c. Toxic or expensive fluid;
d. Corrosive fluids.
. The process parameters should be clear the category of
the following a. Low voltage, small pressure difference and large flow;
b. Medium pressure or low pressure, large pressure difference;
c. High temperature and high pressure, high pressure difference;
d. Temperature and temperature difference;
e. The above or any other category combination.
. Use one or more of the following are the requirements for comprehensive
a. Small amount of leakage or ask for cut off;
b. Good stability, convenient maintenance;
c. To adjust the weight of the pneumatic valve weight and volume size requirements;
d. Movement speed requirements.