Patent ID: 9662752
Date: 2017-05-30
CPC Classifications: B23P,F16K,G05D,Y10T

Claim:
1. A method of modifying an actuator for a fluid regulator, the actuator comprising an actuator housing, a diaphragm, a linkage, and a vent opening formed in the actuator housing, the diaphragm disposed in the actuator housing and separating the actuator housing into a first chamber and a second chamber, the linkage operatively connected to the diaphragm and arranged to be operatively connected to a valve stem, the first chamber hydraulically connected to a fluid outlet of a regulator body to sense a fluid pressure at the fluid outlet, and the vent defining an air exhaust path out of the second chamber to surrounding ambient atmosphere, wherein the method comprises steps of: providing a damper comprising a ball check valve; and operatively installing the damper to the vent while the fluid regulator is in service to sense a fluid pressure at the fluid outlet without taking the fluid regulator out of service so as to control flow of air exhausted through the vent, wherein the ball check valve is arranged to allow air to exhaust from the second chamber through the vent when air pressure within the chamber exceeds a set point pressure and to prevent air from entering the second chamber through the vent.