Anti-pollution isolating structure and working principle of pneumatic valve

anti-pollution isolating pneumatic valve: is installed on all kinds of piping system to strictly prevent backflow medium, protect by medium or device is not contaminated non-return type of pneumatic valve. Consists of two series of check the pneumatic valve and transition sections, sealed tight, to ensure that the media there is no point return.
anti-pollution isolating pipe pneumatic valve to prevent backflow pollution in drinking water pipeline safety devices, to ensure the health and safety of drinking water.
structure: secure anti-pollution isolating pneumatic valve is between the two check pneumatic valve and a drainage device. Drainer on cavity with high-pressure hose connected to the primary check pneumatic valve inlet side. The first, second level check pneumatic valve is mainly composed of pneumatic valve, pneumatic valve cover, pneumatic valve, gasket, spring, etc. Drainage device is mainly composed of pneumatic valve, pneumatic valve cover, diaphragm, pneumatic valve, sealing plate, pneumatic valve, pneumatic valve seat, spring, etc. Pneumatic valve as two ordinary anti-pollution isolating check pneumatic valve series.
working principle: anti-pollution isolating pneumatic valve as two check pneumatic valve series, when there is a seal damage, the other one also plays a role of sealing, to prevent backflow. But at the same time two check pneumatic valve seal damage, lose the check, its safety and reliability is relatively worse, principle of work is relatively simple. Anti-pollution isolating pneumatic valve on the basis of normal middle add drainer, so even if the two check pneumatic valve seal damage at the same time, it also can have the effect of preventing backflow pollution.