Patent ID: 7249748
Filing Date: 2007-07-31
Classification: E03B,F16K,Y10T

Abstract:
1. An electric motor actuated stop and self-closing check valve for controlling forward and back-flow of liquid in a liquid conveying line and reducing liquid surge pressure transients and slamming of valve components, comprising: A) a valve body having an inlet port and an outlet port, relative to forward-flow of a liquid, B) a valve seat disposed within the valve body intermediate said ports, C) a valve disc disposed within the valve body having an elongated disc stem which extends through the valve body, said valve disc and disc stem being free to move along the longitudinal axis of said valve stem to either: D) an electric motor operationally attached to said valve body, E) an actuator rod moveable by action of the electric motor to be disposed at either: F) a hydraulically operated valve disc closing-speed regulator operatively attached to the valve to control the closing speed of the valve disc, wherein said closing-speed regulator comprises: