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Pressure relief valve with improved repairability

A pressure reducing valve and valve body technology, applied in the field of pressure reducing valves, can solve problems such as damage to container threads, damage to pressure reducing valves, etc.

Inactive Publication Date: 2008-01-02
FISHER CONTROLS INT LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hammering the pressure relief valve can damage the threads of the container and possibly the pressure relief valve

Method used

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  • Pressure relief valve with improved repairability
  • Pressure relief valve with improved repairability

Examples

Experimental program
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Embodiment Construction

[0012] The disadvantages of current pressure relief valves are addressed by pressure relief valves with improved repairability, especially field repairability, and improved installation and removal means. The repairable pressure relief valve has a valve body forming an interior grooved surface for insertion of a removal tool. The valve body has a first bearing surface for engaging a second bearing surface of the valve plug assembly. Repairable pressure relief valves have a cap over a plug assembly that mechanically supports the seal. The cap is removable to allow seal replacement without affecting the pressure setting or calibration of the regulator.

[0013] The pressure relief valve 2 shown in Figure 1 comprises a valve body 4 forming a "sleeve" which has a lip 7; an inner grooved surface 9 for engagement with a removal tool 31; and an outer threaded surface 5 for for engagement with a container 40 (partially shown). The grooves 18 on the inner grooved surface 9 are alter...

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PUM

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Abstract

A repairable pressure relief valve having a valve body that forms an internal fluted surface provides improved field repairability. The internal, fluted surface is adapted to mate with a removal tool. A valve assembly is slidably mounted in the valve housing and slides under excess pressure to vent vapor from a vessel, such as a tank. The valve body has a first seating surface for mating with a second seating surface on the valve assembly when the valve plug is in the closed position. The relief valve has a seal for sealing an interface between the valve plug and the housing and a removable cap mounted proximate to the valve plug for mechanically supporting the seal. The cap can be removed and the seal can be replaced without extensive disassembly of the valve, thereby eliminating the requirement of re-calibration after a repair has been made.

Description

technical field [0001] The present invention relates generally to a pressure relief valve, and more particularly to a repairable pressure relief valve made to be easily installed and disassembled. Background technique [0002] Pressure reducing valves are often used as safety devices to ensure that the pressure within a container (ie tank, pipe, etc.) does not exceed safe limits. Common pressure reducing valves have a spring that applies a calibrated force to the valve plug. When the pressure in the vessel (and on the valve plug) exceeds the spring force on the valve plug, the valve plug will lift from its seat and relieve the excess pressure. When the force on the valve plug drops below the spring force, the valve plug is drawn back into its seat by the spring force and reseals the container. Without a pressure relief valve, the tank or pipe could burst, causing serious problems. [0003] The most common failure mode of pressure relief valves is unwanted leakage around t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K17/04F16K1/00F16K1/46
CPCF16K1/46F16K17/04Y10T137/7931Y10T137/7932
Inventor 肯尼思·R·希姆诺斯基杰弗里·L·科尔托马斯·B·奥利弗
Owner FISHER CONTROLS INT LLC