Pressure safety pneumatic valve

are negative pressure pneumatic safety valve, as the name implies, can work under the working condition of positive pressure, can work under negative pressure condition. It different from the negative pressure pneumatic safety valve, pressure safety pneumatic valve is also called the broken vacuum pneumatic valve, only when the pressure inside the equipment under normal working pressure, negative pressure pneumatic valve is safe to pass the outside atmospheric pressure of the compression spring, let air into the equipment, in order to protect the normal working state of the equipment. Pneumatic valve, pressure safety is pneumatic valve and positive pressure and negative pressure safety security of pneumatic valve two functions in one body. Usually at the top of the cement warehouse, mixing station, warehouse, silos are used to the security of pneumatic valve. At present, the domestic leading and obtain the national patent is negative pressure pneumatic valve product safety by its security pneumatic valve factory successfully developed, and has set up a successful on the market.
are safe working principle of pneumatic valve, negative pressure in the bin when charging or discharging produces high pressure or negative pressure, when the pressure difference between the outside warehouse to warehouse in the normal range bin can still work normally, once the differential supernormal, will lead to bin equipment damage or accident detonation storehouse. In order to avoid accidents, safety installation is negative pressure pneumatic valve is the indispensable safety equipment. Safe pneumatic valve can release the hold was too much pressure, can alleviate the negative pressure condition at the same time. Supernormal within the warehouse pressure difference, pressure safety pneumatic valve will open automatically, to ensure the pressure inside the warehouse is always in a normal working range, when pressure is back to normal after, is negative pressure pneumatic valve will automatically shut down safely. Pressure safety pressure of the pneumatic valve range:
positive pressure range: - MmHO
negative pressure range: - — - MmHO
factory Settings: - — MmHO
are negative pressure safety pressure pneumatic valve belong to automatic pneumatic valve class, mainly used in boilers, pressure vessels and piping, control pressure shall not exceed the specified value, to protect personal safety and equipment operation plays an important role. Safety pneumatic valve was three external spring rod to keep external annular pneumatic valve cover tightly closed until the pressure is less than the spring force status of the silos. When the pressure in the storehouse is too high or too low, the positive and negative security once pneumatic valve pressure value exceeds preset range, pneumatic valve cover on pushing the pressure release ( Positive pressure discharge) 。 Small pneumatic valve cover covered outside the center of the pneumatic valve cover from below circular openings, small pneumatic valve cover by single spring rod is fixed, and through the silos within the standard atmospheric pressure to the external cover pneumatic valve. Pumping pressure, the pressure safety pneumatic valve spring compression and pneumatic valve cover, air entering (from silo external Negative pressure into) , at that moment, to ensure the rapid pressure balance and to push the center pneumatic valve cover in the closed position.