Surge relief valve
AssigneeFlow Safe, Inc.
InventorsJeffrey R. Martin, John W. Ostroot
Life of this patent
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Abstract
A surge relief valve comprising a main valve body having a dome port and an inlet port. The inlet port is in fluid communication with a first fluid. The invention further includes a dome reservoir connected to the main valve body via the dome port and arranged to hold a second fluid, a piston located in the main valve body, the piston in fluid communication with the reservoir, and a dampening ring positioned around the circumference of the piston operatively arranged to dampen the piston, wherein the first fluid exerts an upward force on the piston, the second fluid exerts a downward force on the piston, and the piston is arranged to move in response to a differential in the upward and downward forces, wherein the first and second fluids are isolated from one another.
Claims27
A surge relief valve comprising:
- a main valve body comprising a dome port and an inlet port, wherein said inlet port is in fluid communication with a first fluid;
- a springless dome reservoir connected to said main valve body via said dome port and arranged to hold a second fluid, said dome reservoir external to said main valve body;
- a piston located in said main valve body, wherein said piston is in fluid communication with said reservoir;
- and,
- a dampening ring positioned circumferentially about said piston and operatively arranged to dampen movement of said piston;
- wherein said first fluid exerts an upward force on said piston, said second fluid exerts a downward force on said piston, and said piston is arranged to move in response to a differential in said upward and downward forces, wherein said first and second fluids are isolated from one another;
- and,
- wherein said springless dome reservoir lacks a piston;
- and,
- wherein said downward force is created solely by compression of said second fluid within said springless dome reservoir.
A method for relieving pressure in a fluid-containing space comprising:
- exerting an upward force on a piston in a relief valve connected to a fluid-containing space, wherein said upward force is generated by a first fluid in said fluid-containing space;
- exerting a downward force on said piston, wherein said downward force is generated solely by a second fluid in a dome reservoir connected to said relief valve, and wherein said dome reservoir lacks a piston and is springless and external to a main valve body of said relief valve;
- moving said piston in response to a differential between said upward and downward forces;
- and,
- dampening movement of said piston by means of a dampening ring positioned circumferentially about said piston.
Dependencies are inferred from the claim text.