Material category ① pneumatic valves pneumatic valve sealing surface varies, sealing method and material requirements vary; ② ordinary wedge gate valves, brass ring of material, fixation methods, polishing should explain; ③ soft sealing valve, the valve plate lining physical chemistry and health testing data plastic material; ④ valve sealing surface should be marked on the body sealing surface materials and butterfly board material; their physical and chemical test data Weifang valve, in particular health requirements rubber, anti-aging properties, wear performance; usually nitrile rubber and EPDM rubber, non-mixed with recycled plastic. Pneumatic valve Classification [pneumatic valve main types manner] 1) pneumatic V type ball valve 2) Pneumatic O type cut off ball 3) of torque type cylinder valve 4) electromagnetic diaphragm 5) pneumatic diaphragm straight program 6) electric valve Shandong Valve Co., Ltd. Everbright wide production of this type of valve application, reliable quality, no leakage, leakage phenomenon, frequent switching is not stuck, rusted, the majority of chemical plants, thermal power plants, steel mills, printing and dyeing, food the best choice for the plant. Valve shaft packing ① As the pipe network in the pneumatic valve, normally not open and close frequently, requiring the filling in a few years of inactivity valve brand, not aging filler, long-term effects remain sealed; ② fill valve shaft should also bear the frequent start Good resistance when closing the valve manufacturer, sealing effect; ③ In view of the above requirements, fill valve shaft does not seek to change or 10 years for life without replacement; ④ Packing For replacement under pneumatic valves should be designed to have water pressure conditions change measures. Shandong valves | valves | valve provided by the Shandong Shandong Everbright Everbright Valve Co. Shandong Everbright Valve Co., Ltd. (www.sdgdfm.com) located in Weifang City, Shandong Province, Cravens District Bao Tong Street North Makers Industrial Park. Scraps and development in the wave of market economy, the current Everbright valve has a high profile in the ball, and enjoys a good reputation. Everbright valve made whole network business alliance certification, marking our service and management level has reached a new height. Everbright valve staff willing to work with all people of insight and common development, for a better future.