Automatic pneumatic valve common fault prevention measures

fault, one of the pneumatic valve. The reasons are: (1) the control channel is sundry jam ( Channel small, easy to plug) ； (2) piston for rust stains card at the highest position; Is the upper bearing, but can't move down, can't open the main. So the piston vacuum pneumatic valve must be installed before the filter; For new installations or stop using the reduced pressure pneumatic valve for a long time, be sure to disassemble and clean. Can't afford to direct fault another, pneumatic valve, decompression. The reasons are: (1) the piston at a particular location ( Not the top) Stuck; (2) the main pneumatic valve pneumatic valve guide hole in cylinder set a handle position ( Not closed position) Stuck; (3) the lower main pneumatic valve pneumatic disc spring fracture or failure; (4) pulse pneumatic valve pneumatic valve handle pneumatic valve seat hole in a certain position ( Not closed position) Always stuck to the piston by pressure; (5) the main pneumatic disc and the main pneumatic seat between the sealing surface, dirt stuck or Nick; 6 diaphragm failure due to fatigue or damage. For vacuum pneumatic valve, in particular emphasis on regular inspection. If found dirt, rust stains will remove in time; Piston ring damage should be updated; A spring failure need available; If not closed on sealing surface, should be reground; Diaphragm is ineffective to replace; Confirmed by the use of pneumatic valve handle coarser, application of sand paper burnish. After three, pneumatic valve can not adjust pressure. In addition to the above various reasons, there are: (1) the adjusting spring failure; (2) the cap joint leakage, unable to maintain pressure. It also depends on inspection process to prevent in time. In addition, there is a phenomenon, that is, pneumatic valve after pressure pulse wave and unstable. This is the difference in input medium and output quantity is too big, should be to choose the pneumatic valve diameter of pneumatic valve. There is also a cause of pneumatic valve after pressure instability, adjusting spring improper selection; A nominal pressure relief pneumatic valve, adjust the spring there are a few, such as nominal pressure for kilogram per square centimeter, adjusting spring - kilogram per square centimeter, kg/cm2, - kilogram per square centimeter of three, if after the pneumatic valve pressure just - kilogram per square centimeter, but spring is - kilogram per square centimeter of that kind of, don't the pneumatic valve pressure is adjustable.