Description
Features:
■ Bi-directional downstream seal structure, improved service life;
■ Fixed metallic seal (between value plate and valve seat, and between valve seat and valve body); ■ Simple and reliable design for wedge disc and valve seat, which can reduce on-site service and minimize spare and accessory parts inventory;
■ Seal ring between valve seat and valve body can facilitate low-pressure sealing and prevent particulate contamination entering into valve body cavity and sealing area;
■ Valve stem seal design covers all pressure ratings, full temperature range and all possible fluid conditions in wellhead and manifold environment;
■ Metallic seal is applied between valve bonnet and valve body;
■ Valve stem’s rear seal structure allows for valve to be replaced when valve stem seal is under pressure;
■ In order to ensure safety, a grease injection device can be placed behind the valve stem’s rear seal and set on the valve bonnet to eliminate leakage into valve body;
■ Ball screw can effectively improve switch efficiency, reduce switch working torque, and facilitate easy and quick opening and closing of valves
