Fluid control valve

A fluid flow control valve, comprising:

• a valve body, an inlet in the valve body, an outlet in the valve body and a valve seat separating the inlet and the outlet, a valve member reciprocal in the valve body movable from an open position spaced from the valve seat to a closed position in engagement with the valve seat blocking fluid flow from the inlet to the outlet, and means for actuating the valve member, said valve member including a resilient seat that seats on the valve body seat, said valve member having a geometric axis offset from the axis of the valve seat in the valve body, said valve member being freely rotatable about the geometric axis thereof when the valve member is in its open position so that each time the valve members closes, it will seat in a different position to reduce wear on the valve member, said valve member being offset from the axis of the valve seat in the valve body so that as the actuation means moves the valve member initially from its closed position toward its open position, the valve member tends to fulcrum on the edge of the valve seat in the valve body facilitating opening of the valve as the differential pressure acting on the valve member at the valve seat tends to close the valve member and the actuation means tends to open the valve member causing pivoting of the valve member, said inlet being positioned such that inlet pressure tends to close the valve member and also positioned such that it directs inlet flow against the valve member upstream from the valve seat to cause rotation thereof.

A fluid flow control valve, comprising:

• a valve body, an inlet in the valve body, an outlet in the valve body and a valve seat separating the inlet and the outlet, a valve member reciprocal in the valve body movable from an open position spaced from the valve seat to a closed position in engagement with the valve seat blocking fluid flow from the inlet to the outlet, and means for actuating the valve member including a reciprocal valve stem supporting the valve member in the valve body, said valve member being pivotally mounted on the valve stem, said stem being offset from the axis of the valve seat in the valve body so that as the actuation means moves the valve member initially from its closed position toward its open position, the valve member body facilitating opening of the valve as the differential pressure acting on the valve member at the valve seat tends to close the valve member and the actuation means tends to open the valve member causing pivoting of the valve member, said inlet being positioned so that inlet fluid pressure tends to close the valve member so there is a net closing force acting on the valve member, said offset relation to the valve seat from the valve stem and the pivotal mounting of the valve member being constructed to reduce the required opening force applied by the actuation means to the valve member because of a moment arm created by the offset of the valve stem from the valve seat.

A fluid flow control valve, comprising:

• a valve body, an inlet in the valve body, an outlet in the valve body and a valve seat separating the inlet and the outlet, a valve member reciprocal in the valve body movable from an open position spaced from the valve seat to a closed position in engagement with the valve seat blocking fluid flow from the inlet to the outlet, and means for actuating the valve member, a reciprocal valve stem supporting the valve member in the valve body, said valve member being pivotally on the valve stem, said stem being offset from the axis of the valve seat in the valve body so that as the actuation means moves the valve member initially from its closed position toward its open position, the valve member tends to fulcrum on the edge of the valve seat in the valve body facilitating opening of the valve as the differential pressure acting on the valve member at the valve seat tends to close the valve member and the actuation means tends to open the valve member causing pivoting of the valve member, there being a greater distance between the valve stem and the axis of the valve seat in the valve body than the distance between the axis of the valves seat and the edge of the valve seat so that a relatively small force applied to the valve stem will open the valve, said valve member including a resilient seat that seats on the valve body seat, said valve member being rotatable in the valve body so a different portion of the resilient seat seats on the valve body seat as the valve member opens and closes, said inlet being positioned so that inlet fluid pressure tends to close the valve member so there is a net closing force acting on the valve member, said offset relation of the valve seat from the valve stem and the pivotal mounting of the valve member being constructed to reduce the required opening force applied by the actuation means to the valve member because of a moment arm created by the offset of the valve stem from the valve seat.

A fluid flow control valve, comprising:

• a valve body, an inlet in the valve body, an outlet in the valve body and a valve stem separating the inlet and the outlet, a valve member reciprocal in the valve body movable from an open position spaced from the valve seat to a closed position in engagement with the valve seat blocking fluid flow from the inlet to the outlet, means for actuating the valve member including a reciprocal valve stem supporting the valve member in the valve body, said valve member being somewhat pivotally mounted on the valve stem, said stem being offset from the axis of the valve seat in the valve body so that as the actuation means moves the valve member initially from its closed position toward its open position, the valve member tends to fulcrum on the edge of the valve seat in the valve body facilitating opening of the valve as the differential pressure acting on the valve member at the valve seat tends to close the valve member and the actuation means tends to open the valve member causing pivoting of the valve member, and stabilizing means for engaging the valve member or the valve body in its closed position to balance the valve member and assure alignment and mating of the valve member on the valve body seat, said inlet being positioned so that inlet fluid pressure tends to close the valve member so there is a net closing force acting on the valve member, said offset relation of the valve seat from the valve stem and the pivotal mounting of the valve member being constructed to reduce the required opening force applied by the actuation means to the valve means because of a moment arm created by the offset of the valve stem from the valve seat.