초록 ▼

A check valve for controlling the flow of fluid in a conduit so that flow in one direction is unimpeded and flow in the opposite direction is prevented which provides in the open position an unimpeded fluid passage permitted the passage of cleaning tools or material separators through the valve. A v

A check valve for controlling the flow of fluid in a conduit so that flow in one direction is unimpeded and flow in the opposite direction is prevented which provides in the open position an unimpeded fluid passage permitted the passage of cleaning tools or material separators through the valve. A valve seat and an arcuate valve sealing member are formed with mating bi-planar sealing surfaces, the valve seat being formed by making intersecting 45 degree cuts from the transverse end plane of a tubular member to the horizontal diametral plane and the valve sealing member being formed by making 45 degree intersecting cuts from the periphery of a corresponding tubular member to the horizontal diametral plane, producing an arcuate member, which in the open position has the configuration of the interior of the valve body.

대표청구항 ▼

In a swing check valve having a body portion defining a fluid passage therethrough, a valve seat mounted in said body, a pivot member supported by said body, a pivotable sealing member rotatable around said pivot pin for engaging said valve seat for closure of the fluid passage when flow is in one d

In a swing check valve having a body portion defining a fluid passage therethrough, a valve seat mounted in said body, a pivot member supported by said body, a pivotable sealing member rotatable around said pivot pin for engaging said valve seat for closure of the fluid passage when flow is in one direction and movement away from the valve seat when flow is in the opposite direction, the improvement comprising: said valve seat having a bi-planar sealing surface developed by making two intersecting 45 degree cuts from the transverse end plane of a tubular member to the horizontal diametral plane and said valve sealing member having an arcuate configuration and having a bi-planar sealing surface developed by making two intersecting 45 degree cuts from the periphery of a corresponding tubular member to the horizontal diametral plane using the portion removed to produce an arcuate sealing member mating with said valve seat in the closed position and having the configuration of the inner wall of said body when rotated 90 degrees to the open position.