Pneumatic valve pneumatic valve working principle _ _ breathing breathing breathing pneumatic valve categories

respiration pneumatic valve working principle
pneumatic valve is to use spring limit pneumatic valve plate, or determined by the positive and negative pressure or breath. And gravity type pneumatic valve, breathing is to rely on gravity to adjust, when the air in the container reaches more than the weight of the pneumatic valve opening pressure relief.
description: when the pressure in the tank is balanced with the atmospheric pressure, pneumatic valve breathe out and export pneumatic pneumatic valve seat valve closely cooperate, suction pneumatic disc closely cooperate with the inlet pneumatic valve seat. When the pressure in the tank is more than the atmospheric pressure value ( Too much positive pressure) When the tank pressure pneumatic disc under direct effects on breath, and overcome the pneumatic disc gravity and external pressure acting on the pneumatic valve, pneumatic valve to open air valve by A channel of the high pressure discharge tank, the tank pressure and atmospheric pressure balance. When the pressure in the tank is lower than atmospheric pressure value ( That had a low negative pressure) , atmospheric pressure through the suction channel B to enter and direct effects on below the inlet pneumatic valve, pneumatic disc and overcome gravity, and ACTS on the pneumatic valve at the top of the tank pressure, opening suction pneumatic disc to add pressure in the tank, the tank pressure and atmospheric pressure balance. When the fire breaks out, fire source may spread to the storage tank through the inlet, when the flame passes breathing small pore of the flame-resistant core in pneumatic valve, due to the wall effect, the corrugating plate absorbs a great deal of heat, the heat loss at once, so that the flame is extinguished. Pneumatic valve category

breathing a pneumatic valve, breathing pattern
tight breathing pattern pneumatic valve is typically used for low pressure straight pipe, sealing performance depends entirely on plug and plug the inosculation between good or bad, the sealing surface pressure depend on a nut at the bottom of the screw. Commonly used in PN or less. Mpa。
2, pneumatic valve
packing packing breathing breathing pneumatic valve is done by pressure filler plug and plug seal. Due to the packing, so sealing performance is better. Usually this breathing pneumatic valve packing gland, need not out of pneumatic valve plug, thereby reducing the leak of a working medium. This kind of breathing pneumatic valve used for PN Mpa pressure or less a lot.
3, pneumatic valve sealing breathing
breathing pneumatic valve sealing is done by the pressure of the medium itself pressure tight seal between the plug and plug. Plug the head up, out medium through inlet holes into the plug head, will plug upward pressure, this kind of structure is generally used in air medium.
4, the oil seal type respiration pneumatic valve
now expanding the application range of the pneumatic valve, appeared with a forced lubrication oil seal type pneumatic valve to breathe. Due to forced lubrication between the sealing surface of the plug and plug to form a layer of oil film. This sealing performance is better, easy opening and closing, to prevent the damage of sealing surface.