When the bellows valve open, the valve opening height Shandong cast steel valves for nominal 25% to 30% of the diameter, the flow has reached the maximum, that valve has reached the fully open position. So off fully open position of the valve, the valve stroke should be determined. Electric valve responsive, safe and reliable, many of the control requirements of high plant designed for pneumatic control element is disposed compressed air station. Electric is to electricity. And can control the means of their traffic. American Standard bellows valve stem bellows sealed with packing secondary seal, double bellows, non-rising handwheel, stem anti-rotation device applications: industrial, power systems, exhaust gas purification devices, gas, steam equipment, vacuum equipment, hot water, thermal oil applications stainless steel valves, shipbuilding, etc. Medium: Oil Weifang stainless steel valves, natural gas, steam, hot water, oil valves, industrial water. When the bellows valve opening, valve opening height, the nominal diameter of 25% to 30%, the flow has reached the maximum, that valve has reached the fully open position. So off fully open position of the valve, the valve stroke should be determined. Electric valve responsive, safe and reliable, many of the control requirements of high plant designed for pneumatic control element is disposed compressed air station. Electric is to electricity. And can control the means of their traffic. Valves, Shandong Everbright valves, stainless steel valves are provided by Shandong Weifang Everbright Valve Co. Shandong Everbright Valve Co., Ltd. (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!