Patent ID: 8678029

Claim:
A pressure regulator comprising: a housing assembly defining a main fluid flow path from an inlet end to an outlet end; a tubular plunger body supported within said housing assembly for linear movement toward and away from a valve seat in response to fluid pressure at said outlet end; a first pressure chamber defined in part by a control diaphragm extending between said housing assembly and said tubular plunger body; an actuator sleeve supported within said housing assembly and engaged with said tubular plunger body; a second pressure chamber defined in part by a shut-off diaphragm extending between said housing assembly and said actuator sleeve; a fluid port arranged to supply pressurized fluid to said second pressure chamber to thereby produce linear movement of said actuator sleeve to engage and drive said tubular plunger body independent of the pressure at said outlet end, into engagement with said valve seat to shut off said flow path, and wherein when said actuator sleeve is in a valve-open position, said tubular plunger body is free to disengage and move toward or away from said actuator sleeve and said valve seat solely in response to fluid pressure at said outlet end.