Erosion resistant soft seated valve trim
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0599252
(1984-04-11)
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발명자
/ 주소 |
- Tripp, Dale S.
- Kunkle, Timothy E.
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출원인 / 주소 |
- White Consolidated Industries, Inc.
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
4 인용 특허 :
7 |
초록
▼
The disclosure is related to a high pressure fluid control valve including a valve seat made from a resilient, deformable material and a main valve plug which is matable with the resilient, deformable valve seat. A selectively, axially displaceable valve stem is associated with the valve plug whereb
The disclosure is related to a high pressure fluid control valve including a valve seat made from a resilient, deformable material and a main valve plug which is matable with the resilient, deformable valve seat. A selectively, axially displaceable valve stem is associated with the valve plug whereby a contact load placed upon the valve plug by the valve stem will cause the valve plug to be become imbedded within the deformable material comprising the valve seat when the valve is closed and thereby conform the deformable seat precisely to the contour and configuration of those portions of the valve plug which mate with the valve seat. In this manner, a precise zero-leakage mating is obtained each and every time the plug is mated with the seat. In accordance with the invention, an auxiliary throttle plug is associated with the main valve plug and is arranged to mate with a second, metal valve seat which is arranged in an area removed from the resilient, deformable valve seat. The axial movements of each of the valve plug and the throttle plug are coordinated in a manner whereby the primary throttling areas for the fluid flow, particularly during valve opening and valve closing operations are displaced to portions of the valve structure which are remote from the resilient, deformable valve seat.
대표청구항
▼
1. A high pressure fluid control valve which comprises (a) a valve body including an internal flow path defining a fluid inlet and a fluid outlet, (b) a first valve seat arranged within said internal flow path, (c) a second valve seat arranged within said internal flow path in a spaced relation
1. A high pressure fluid control valve which comprises (a) a valve body including an internal flow path defining a fluid inlet and a fluid outlet, (b) a first valve seat arranged within said internal flow path, (c) a second valve seat arranged within said internal flow path in a spaced relation to said first valve seat, (d) a main valve plug comprising integral upper and lower portions, (e) said main valve plug being selectively, axially movable within said internal flow path and matable with said first valve seat to interrupt fluid flow between the fluid inlet and the fluid outlet, and (f) a throttle plug axially movable within said internal flow path in a predetermined relative motion with respect to said main valve plug, and matable with said second valve seat to interrupt fluid flow between the fluid inlet and the fluid outlet, (g) at least the lower portion of said main valve plug including a bore formed therein, (h) said throttle plug being received in said bore whereby said throttle plug is in a coaxial, telescoping relation with said main valve plug, (i) said throttle plug being movable relative to said main valve plug within said bore through said predetermined limited distance, whereby during a valve opening operation said main valve plug lifts from said first valve seat before said throttle plug lifts from said second valve seat, thereby throttling initial fluid flow primarily across said second valve seat, (j) said lower portion of the main valve plug having an outer diameter that is greater than the outer diameter of said upper portion of the main valve plug, (k) the outer diameter of the upper portion of said main valve plug being substantially equal to the outer diameter of said throttle plug, (l) at least one fluid flow path being formed completely through said lower portion of the main valve plug whereby fluid may flow from below to above said lower portion of the main valve plug, (m) at least one flow path being formed completely through the throttle plug and the upper portion of said main valve plug whereby fluid may flow from below the throttle plug to above the upper portion of the main valve plug, (n) the portions of said internal flow path above the upper portion of the main valve plug being isolated from the portions of said internal flow path which overlie the larger outer diameter lower portion of the valve plug, (o) whereby fluid leakage across the main valve plug and through the flow path formed through the lower portion of the valve plug will flow to a portion of the internal flow path of the valve body which is isolated from the portions of the internal flow path above the upper portion of the main valve plug, thereby eliminating any unbalanced pressure reversals which may occur due to changes in the exposure of each of the main valve plug and throttle plug to high pressure inlet fluid during a valve opening operation. 2. The high pressure fluid control valve according to claim 1, further characterized by (a) said first valve seat comprising a deformable resilient material, and (b) said second valve seat comprising a hardened erosion-resistant material.
이 특허에 인용된 특허 (7)
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Schdel Hermann (Ergste DEX), Double-seat valve.
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Banks George W. (24824 43rd Ave. S. Kent WA 98031), High pressure, three stage, balanced valve.
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Wheeler William R. (Saratoga CA), High vacuum gate valve.
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Mases Per E. (MalmSEX) Lundquist Gunnar (MalmSEX) Nyqvist Harry (Tullinge SEX) Carlsson Torsten (Sdertlje SEX), Non-mixing valve.
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Huber Richard (Modling near Vienna OE), Sealing system for shutoff elements.
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Huber ; Richard, Sealing system for shutoff units.
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Foller Werner (Heiligenrode DT), Throttle valve.
이 특허를 인용한 특허 (4)
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Hopper, Hans Paul, Valve assembly.
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Hopper, Hans Paul; Finn, Fergal, Valve assembly.
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Hopper, Hans Paul, Valve assembly with cage and flow control assembly.
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Hopper, Hans Paul; Finn, Fergal, Valve assembly with cage and flow control assembly.
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