The invention relates to a low-torque and two-way zero leakage all-
metal sealing
butterfly valve. According to the technical scheme, the low-torque and two-way zero leakage all-
metal sealing butterflyvalve comprises an actuating mechanism, a thread sleeve, a lead screw, a connecting shaft, a valve rod, a bracket, a packing gland, a valve rod packing, a valve body, a
valve seat, a butterfly plate,a reinforcing rib, a wedge splitting sliding component, a
valve seat sealing filler, an all-
metal sealing ring, a butterfly plate sealing filler, needle roller bearings and rollers. The low-torque and two-way zero leakage all-metal sealing
butterfly valve adopts metal hard sealing and active sealing, sealing specific pressure is high, and zero leakage and two-way sealing are achieved; wear-proof,temperature-resistant and
corrosion-resistant
alloy materials are overlayed on the sealing surfaces of the
valve seat and the butterfly plate, so that the service life is long; in the
valve opening and closing processes, the sealing surfaces are not in contact, no friction is caused, operating torque is little, and the closing speed is high; the valve seat and the butterfly plate are of detachable structures, and are simple in structure, convenient in overhaul and low in maintenance cost; and the valve plate is relatively thin, so that the flow resistance is little, the
discharge coefficientis high, and the scope of application is wide.