Domestic production valve manufacturers are more rigid single gate valve connected even mostly non-uniform size. Mainly divided into the following categories: the JB / T2203-1999 "gate length of the structure," based utility category. Currently most of the safety valve manufacturer in accordance with this standard design and production. Manual valve works: handwheel by hand wheel and stem thread forward, back, raised or lowered with the stem of the valve plate Shandong valve connection, to open and close the action. ONLY use the valve fully open, fully closed media run on the various types of piping or equipment used, does not allow for throttling. The valve with a hand wheel or handle, no further increase in the operating aid Leverage (In case Mifengbuyan, you should check to repair the sealing surface or other parts). Hand wheel, handle clockwise to close, otherwise open. Valve with a transmission mechanism should be required to use the product manual. When the valve is closed, the sealing surface can only rely on media pressure to seal PZ41H slagging valve manufacturers that rely only on media z41h wedge gate valve flange sealing surface pressure ram pressure to the other side of the seat to ensure the sealing surface of the valve, which is self-sealing. Most of the valve is sealed by force, that is, when the valve is closed, to rely on external pressure to force the gate valve to ensure the tightness of the sealing surface. PZ41H slagging valve manufacturers, valve, valve type 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!