초록 ▼

A flow through check valve having a covered access port and a pivotal clapper member, the valve body and access port cover providing a recess to completely receive the clapper member out of the flow stream such that the clapper member never comes into contact with the access port cover. The clapper

A flow through check valve having a covered access port and a pivotal clapper member, the valve body and access port cover providing a recess to completely receive the clapper member out of the flow stream such that the clapper member never comes into contact with the access port cover. The clapper member is provided with a modified rabbet cut recess for receiving an O-ring therein which results in a reduction in weight, a reduction of manufacturing costs and ease of replacement of the O-ring.

대표청구항 ▼

In a check valve having a valve seat and a cooperating pivotally mounted clapper member, said clapper member having a closed surface area for contacting said valve seat, an improvement comprising: a substantially V-shaped recess provided in the clapper member closed surface area and an O-ring dispos

In a check valve having a valve seat and a cooperating pivotally mounted clapper member, said clapper member having a closed surface area for contacting said valve seat, an improvement comprising: a substantially V-shaped recess provided in the clapper member closed surface area and an O-ring disposed in said V-shaped recess the cross-sectional angle of said V-shaped recess being acute.