By the pneumatic valve selection

the pneumatic valve is one of the largest a dosage of pipe network in pneumatic valve, used in DN mm or less water supply pipe network, for a long time, our company use by the pneumatic valve problems more serious, and leakage, lax, insufficient strength, short-lived phenomenon is relatively common. Water supply department in the last year ( Years) A year more than the amount of maintenance, for this kind of situation, the enterprise standard of the company is established 'network by the pneumatic valve, pneumatic valve TongZha technical requirements'.
the technical requirement is mainly put forward the following:
( ） The seal shall be improved. It is cancelled packing, use the 'O' type sealing ring; The second is made of high quality filler.
　　（ ） Material requirements: strict regulations, each part of the material.
　　（ ） Size requirements; Pneumatic valve stem, in the cross section of the pneumatic valve body wall thickness, water minimal size.
　　（ ） Anticorrosion performance: pneumatic valve internal and external guarantee not rust, corrosion, especially the site of contact with water must be clean and health.
　　（ ） Lock anti-theft, to unit the door, on the indoor riser as pneumatic valve need to guard against theft, control function. Product is selected according to the above requirements, control of small pneumatic valve quality and performance.