Electric Off-Center Semi-Ball Valve (PQ947X)

Eccentric Crankshaft: Using Archimedes spiral principle, design the running track of crankshaft running track to be around the valve shaft center and extend outside in fixed proportion, to rotate around axis with angular velocity, Close progressively to the valve seat during the closure of the valve, to achieve reliable seal in the close moment, to avoid the friction state for the sealing when the gate is open and closed.

Whole sulfide ball crown: For the eccentric semi-ball valve of diameter less than DN600, Adopt direct whole area vulcanization by rubber on the ball crown part, with high-performance on anti-corrosion; For diameter greater than DN600, use stainless steel plus rubber seal ring, it is common strong for valve parts and components, very easy for maintain, maintenance, and enhance the valve life indirectly.

Hemisphere structure: The ball valve is hemispherical, under the open state of valve gate, the ball crown can avoid being in the valve cavity, avoid medium scour directly on the sealing surface, at the same time, to ensure full-flow for valve, minimize energy loss, and the head loss is almost zero.