A common fault analysis three automatic pneumatic valves

one failure, pneumatic valve cannot work normally. The reason is: (1) the control channel debris jam ( The channel is small, easy to jam) ; (2) piston rust stains card at the highest position, and the force of the upper part, but it can't move down, don't open the main channel. Therefore, pneumatic piston valve must be installed before the filter, the newly installed or stop using pneumatic valve for a long time, be sure to disassemble and clean. In the second failure, by the pneumatic valve, decompression. The reason is: (1) the piston in a location ( Not the highest position) Jam. (2) the main pneumatic valve pneumatic valve rod guide plate on the cylinder hole location ( Instead of sealing position) Jam. (3) the main pneumatic valve spring break or the failure of the lower lobe; (4) the location of the pulse pneumatic valve stem hole in the seat, Instead of sealing position) Jam, piston always pressure; (5) between the main pneumatic valve and main pneumatic valve seat sealing surface, with mud stuck or indentation; 6 diaphragm failure due to fatigue or injury. With regular inspection, with particular emphasis on pneumatic valve. Found dirt, rust stains, should be removed in time; Piston ring damage should be updated; Spring failure, instead use; Sealing surfaces, such as not closed, should be reground; Patch does not work, cannot be replaced; Confirmed the use of the application of pneumatic valve handles more coarse grinding. Third, the pressure pneumatic valve can not adjust. In addition to the above reasons, there are: (1) adjusting spring failure; (2) cover leaking joints, unable to maintain pressure. It also depends on the timely treatment, in order to prevent the check. In addition, there is a phenomenon, the pneumatic valve pressure pulse wave, very unstable. This is between the input and output medium is too big, therefore, quite fresh choice pneumatic valve size difference of pneumatic valve. There is an unstable cause pressure pneumatic valve is properly adjusting spring choice; There are several kinds of nominal pressure pneumatic valve, adjust the spring, such as nominal pressure kilogram per square centimeter, adjust there - in the spring Kg/cm - Kg/cm, - Kg / 3 square centimeters, if only - back pressure pneumatic valve Kg/cm2, and spring is - Kilogram per square centimeter of species, the pressure of the pneumatic valve allows adjustment. This site keywords: pneumatic ball valve pneumatic ball valve pneumatic pneumatic valve pneumatic pneumatic valve