Features： Apply wedge flexible disc structure. Rolling bearing is set in valves with large and medium diameter, which can be closed easily. The flange applies stainless steel spiral wound gasket with graphite or compound gasket. The stem sealing applies soft graphite stuffing with reliable sealing. Impact structure and elegant outline. Application： Steel gate valves apply to all pipes of Class150～1500,working temperature-29～425°C（carbon steel）、-40～500°C（stainless steel）to cut off or connect the fluid in the Pipes. Different materials can be applied to various fluids respectively, such as water, vapour, oil products, nitric acid, acetic acid, intense oxidation fluid and urea, etc. Standards: Manufacture Face to face/end to end dimensions PIPE flange Testing & inspection Pressure- temperature ratings API600API6DBS4504,JIS ANSI B16.10GB12221 ANSI B16.5 GB9112～9131JB/T74～90 SH3006HG20615～20635 API598ZB J16006 ANSI B16.34 Body material:WCB、CF8、CF3、CF8M、CF3M、ZG1Cr18Ni9Ti、 ZG1Cr18Ni12Mo2Ti Type of connection：Flange,counter welding Operation：handwheel, bevel gear actuator and electric actuator