Pilot operated relief valve with dual pilot regulators
First Claim
1. A pilot operated relief valve, comprising:
- a valve body having a fluid inlet and a fluid outlet connected by a fluid passageway;
a valve plug disposed within the fluid passageway, the valve plug cooperating with a valve seat to control fluid flow through the fluid passageway;
an actuator connected to the valve plug, the actuator biasing the valve plug towards the valve seat; and
a manifoldless pilot assembly including a first pilot valve and a second pilot valve, the pilot assembly directing fluid pressure upstream of the valve plug to one of the first and second pilot valves,wherein the valve plug moves away from the valve seat allowing fluid to flow through the fluid passageway when the upstream fluid pressure exceeds a predetermined level,wherein the pilot assembly further comprises a first rotary valve and a second rotary valve, the first and second rotary valves being fluidly connected to one another and to the first and second pilot valves, andwherein the first rotary valve and the second rotary valve are mechanically connected to one another so that the first rotary valve and the second rotary valve are actuated simultaneously by an actuating means.
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Accused Products
Abstract
A pilot operated pressure relief valve includes a valve body having a fluid inlet and a fluid outlet connected by a fluid passageway. A valve plug may be disposed within the fluid passageway, the valve plug cooperating with a valve seat to control fluid flow through the fluid passageway. An actuator may be connected to the valve plug, the regulator biasing the valve plug towards the valve seat. A pilot assembly may include a first pilot valve and a second pilot valve, wherein the pilot assembly directs fluid pressure upstream of the valve plug to one of the first and second pilot valves. When the upstream fluid pressure exceeds a predetermined level, the valve plug moves away from the valve seat allowing fluid to flow through the fluid passageway.
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Citations
19 Claims
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1. A pilot operated relief valve, comprising:
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a valve body having a fluid inlet and a fluid outlet connected by a fluid passageway; a valve plug disposed within the fluid passageway, the valve plug cooperating with a valve seat to control fluid flow through the fluid passageway; an actuator connected to the valve plug, the actuator biasing the valve plug towards the valve seat; and a manifoldless pilot assembly including a first pilot valve and a second pilot valve, the pilot assembly directing fluid pressure upstream of the valve plug to one of the first and second pilot valves, wherein the valve plug moves away from the valve seat allowing fluid to flow through the fluid passageway when the upstream fluid pressure exceeds a predetermined level, wherein the pilot assembly further comprises a first rotary valve and a second rotary valve, the first and second rotary valves being fluidly connected to one another and to the first and second pilot valves, and wherein the first rotary valve and the second rotary valve are mechanically connected to one another so that the first rotary valve and the second rotary valve are actuated simultaneously by an actuating means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A manifoldless pilot assembly for a pilot operated pressure relief valve, the pilot assembly comprising:
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a first pilot valve; a second pilot valve; a first rotary valve fluidly connected to the first pilot valve and to the second pilot valve without a manifold; and a second rotary valve fluidly connected to the first pilot valve and to the second pilot valve without a manifold, wherein the first rotary valve and the second rotary valve are mechanically connected to one another so that the first rotary valve and the second rotary valve are actuated simultaneously by an actuating means. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification