High pressure unloader valve

Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems

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Details

F16K 1100, F16K 3112

Patent

active

042929903

ABSTRACT:
An unloader valve for use in high pressure fluid handling systems which includes a valve body having an inlet port, an outlet port and a bypass port. A tubular plunger element is disposed within the housing for axial reciprocal movement, the tubular plunger having apertures formed through its side wall with the aperture communicating with the inlet port and chamber. Affixed to and coaxially aligned with an open end of the plunger is a ball check valve assembly which is disposed in the outlet chamber communicating with the outlet port. Assembled about the tubular plunger are seals and guides which isolate the outlet chamber from the bypass chamber. A poppet valve having a floating seat secured to the plunger is provided for normally isolating the inlet and bypass chambers. A spring housing is secured to the valve body and contains a compression spring which normally urges the plunger in a direction such that the poppet valve is closed. Fluid flow is then from the inlet chamber, through the tubular plunger and through the check valve to the outlet chamber and port. In the event that the fluid handling system with which the unloader valve is used causes a back pressure at the outlet port exceeding a predetermined value, the check valve closes and the plunger assembly moves in a direction against the spring force to open the poppet valve and allow fluid to flow from the inlet chamber to the bypass chamber.

REFERENCES:
patent: 2639722 (1953-05-01), Teague, Jr.
patent: 2952267 (1960-09-01), Reis
patent: 3524465 (1970-08-01), Sadler
patent: 3604446 (1971-09-01), Brooks
patent: 3606904 (1971-09-01), Taylor
patent: 3878864 (1975-04-01), Schurger

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