Hi, I am your little control in the housekeeper, regularly bring common for everyone to understand the little knowledge of industrial control, with little housekeeper study together, progress together! Today we the pneumatic control valve is little knowledge of, you know, pneumatic control valve is an important part in industrial automation, but in our daily use, occasionally leaks of pneumatic control valve, pneumatic control valve leakage problems have what? We then to explore in detail,

Common one, pneumatic control valve leakage problems
(1) pneumatic - valve valve leak due to improper stem length, stem length is long, make up and down the stem are too short, cause contact between valve core and valve seat is not complete, causing the valve leakage,
(2) pneumatic - valve pneumatic control valve is to be packing packing leak to the stuffing box, the axial pressure regulating valve, due to the packing of plastic deformation, will produce radial pressure, the valve stem contact closely, but uneven contact, in the process of pneumatic control valve operation, axial movement, the stem and packing will be in high temperature and high pressure environment, because of high permeability, easy leaking,
(3) pneumatic - valve pneumatic control valve valve core and valve seat deformation leak of erosion and shock, deformation, with the passage of time, can produce a valve core and valve seat does not match the phenomenon, the gap between them, and the clearance between osteoporosis and leak, if your pneumatic - valve leak, whether have to rule out first is above this problem, suit the remedy to the case,

Two, what are the accessories pneumatic control valve in pneumatic control valve, air filter, regulating valve and oil mist detector together three air processing elements, is called a pneumatic triple a, to entering the air purification filter and decompression of the pneumatic instrument to instrument rated supply air pressure, the function of the equivalent circuit of power transformer,
Light and small air filtration pressure reducer design, easy installation, therefore, it has to do with pneumatic transmitter, pneumatic regulator, valve positioner etc installed together, if the air filter and regulator is designed as a whole, become a duplex,
Limit switch valve is one of the control system to detect the valve state, field instruments to the pneumatic - valve open or closed position to switch (contact) signal output, and accepted by routine controller or computer sampling, confirmed after execution of a program, the product also can be used as the important valve interlock protection system and far alarm indication,

Above is little housekeeper this period to bring about the "common leak pneumatic control valve, pneumatic control valve what are the accessories" in detail, what we want to discuss can leave a message, welcome attention ah,