Only clear specifications, type, working pressure pneumatic valve when you meet the procurement requirements of the procurement practices in the current economic environment, the market is imperfect. Under the idea because Weifang valve pneumatic valve manufacturers of products in order to compete, each pneumatic valve were unified design, with different innovations, formed their own corporate standards and product personality. Therefore, when the pneumatic valve procurement more detailed technical requirements, coordinating with manufacturers to reach a consensus, as an annex to the pneumatic valve procurement contracts is essential. Fill valve shaft ① As the pipe network in the pneumatic valve, normally not open and close frequently, requiring the filling in a few years of inactivity, not aging filler, long-term effects remain sealed; ② fill valve shaft should also bear the frequent opening and closing time Z641F pneumatic valve offer, good sealing effect; ③ In view of the above requirements, fill valve shaft does not seek to change or 10 years for life without replacement; under ④ Packing For replacement, pneumatic valves should be designed to have water pressure conditions change measures. Pneumatic valve sealing surface of the material ① different categories pneumatic valves valve, sealing methods and material requirements vary; ② ordinary wedge gate valve, copper ring materials, fixation methods, polishing should explain; ③ soft sealing valve pneumatic valve manufacturers Z641F Physical chemistry valve plate rubber lining materials and sanitary inspection data; ④ valve sealing surface should be marked on the body sealing surface materials and butterfly board material; their physical and chemical test data, in particular the health requirements of rubber, anti-aging properties, wear; usually nitrile rubber and EPDM rubber, non-mixed with recycled plastic. Z641F pneumatic valve price | Valve | Valve Model Everbright Everbright Limited provided by Shandong valve. Valve Co., Ltd. Shandong China Everbright (www.sdgdfm.com) strong, credible, Shandong Weifang ball industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Everbright valve into the brilliant and you work for a better future!