Pneumatic Vent Butterfly Valve

China Vent Butterfly Valve manufacturer Xinhai offers carbon steel, stainless steel Pneumatic Vent Butterfly Valves for gas, oil use etc, DN300-4000. Pneumatic vent butterfly valve, made of steel plate through welding, has the advantages of small size, light weight, convenient utilization. For small torque, it is easy to open or close the valve. Body has oil seal retainer. There is large expansion clearance between the disc and body, which can avoid sticking caused by thermal expansion and contraction. The valve can be equipped with varieties of actuating device, such as handwheel, gear box, electric actuator and pneumatic actuator.Vent butterfly valve is widely used in metallurgy, petroleum and other industries, to regulate gas. http://www.xinhaivalve.com/