Title:
EXCESS FLOW VALVE FOR CRYOGENIC FLUID TANK
Document Type and Number:
WIPO Patent Application WO/2023/028759
Kind Code:
A1
Abstract:
An excess flow valve for cryogenic fluid is disclosed. An example excess flow valve (100) includes a body (200), a piston plug (300), and a spring (400). The body (200) includes a valve seat (246) and an inner body surface (240) that defines an inlet (215), an outlet (225), and a chamber (250). The piston plug (300) is disposed within the chamber (250). The piston plug (300) includes a plug (330) that is configured to engage the valve seat (246) in a closed position and be disengaged from the valve seat (246) in an open position. The piston plug (300) includes an inner piston surface (354), an outer piston surface (352), and a flange (340) that extends from the outer piston surface (352) and defines a flange surface (342). The flange (340), the outer piston surface (352), and the inner body surface (240) at least partially define a spring slot (256) outside of the fluid flow path. The spring (400) is disposed in the spring slot (256) to bias the piston plug toward the open position. The excess flow valve is more effective.
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Inventors:
ZHANG ZHAO (CN)
CAO GUANGBIN (CN)
CAO GUANGBIN (CN)
Application Number:
PCT/CN2021/115338
Publication Date:
March 09, 2023
Filing Date:
August 30, 2021
Export Citation:
Assignee:
ENGINEERED CONTROLS INT LLC (US)
SHANGHAI REGO FLOW TECH CO LTD (CN)
SHANGHAI REGO FLOW TECH CO LTD (CN)
International Classes:
F16K17/06; F16K27/02; F16K31/122
Foreign References:
| CN112534168A | 2021-03-19 | |||
| US4742846A | 1988-05-10 | |||
| JPH0875020A | 1996-03-19 | |||
| JPS63246579A | 1988-10-13 | |||
| JPS62110551A | 1987-05-21 | |||
| GB541795A | 1941-12-11 | |||
| CN103119530A | 2013-05-22 | |||
| CN208169626U | 2018-11-30 |
Attorney, Agent or Firm:
LEE AND LI - LEAVEN IPR AGENCY LTD. (CN)
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