福斯Flowserve平行滑动闸阀

Flowserve has enhanced the design of its size 2? andlarger Double Disc gate valvesto isolate the actuator torque loads from the valve internals (disc pack) to improve its reliable operation and sealing capabilities.The redesign utilizes a slotted stem to transfer the actuation torques to the anti-rotation collar and valve yoke, thus eliminating the torsional loads on the valve disc pack and valve seating surfaces.The valve internals have also been redesigned to change the stem-to-upper wedge connection from threaded and pinned to a T-Head design. Disc retainers are now assembled to the upper wedge using fasteners. There is no wedge pin involved with this assembly.