VALVE

• US 3,784,156 A
• Filed: 02/23/1972
• Issued: 01/08/1974
• Est. Priority Date: 02/25/1971
• Status: Expired due to Term

• Current Assignee: Dresser Industries Incorporated (Halliburton Company)
• Original Assignee: Herbert Paetzel, Horst Pfeiffer
• Inventors: Paetzel, Herbert, Pfeiffer, Horst
• Primary Examiner(s): Schwadron, Martin P.
• Assistant Examiner(s): Matthews, David R.
• Application Number:
  US05/228,567
• Time in Patent Office: 685 Days
• Field of Search: 251/250,340,248,335B,333 137/219
• US Class Current: 251/250
• CPC Class Codes: F16K 1/123 with stationary valve member and moving sleeve
• CPC Class Codes: F16K 31/44 Mechanical actuating means
• CPC Class Codes: F16K 31/54 with pinion and rack
• CPC Class Codes: Y10T 137/3367 Larner-Johnson type valves; i.e., telescoping internal valve in expanded flow line section

Abstract

Corrosive fluid valve having a fixed valve plug and a shiftable valve seat ring. A fluid passage liner comprising flexible bellows endwise-engaging the seat ring, and which liner seals the valve end-to-end without any inside sealing points. A valve actuator engaging the seat ring to open and close the valve from outside the valve passage, and sealed off by the liner from exposure to the corrosive fluid.

Claims

1. A valve particularly for metal attacking fluid media, comprising, in combination, a valve housing having a through flow passage extending from its inlet to its outlet ends;

a valve seat ring received centrally within said housing, said seat ring arranged for shifting axially of said flow passage between valve opening and closing positions, said valve seat ring having generally radial end faces and a tapered seat face intermediate its said generally radial end faces;

means forming with said seat ring a liner for said flow passage extending the full fluid-medium-exposed length of said valve housing between its said inlet and outlet ends, said liner comprising annular bellows, said annular bellows engaging said generally radial end faces of said seat ring at their inner ends;

means provided by said valve housing for supporting said annular bellows at their respective outer ends, said annular bellows engaged at their said outer ends to linerforming portions of said housing provided means, and whereby said bellows extend continuously, in said liner, with said housing provided supporting means and with said seat ring, said bellows arranged thereby for their reciprocal axial extending and contracting to afford said seat ring said axial shifting between its said valve opening and valve closing positions;

a valve plug fixed in said housing at the outlet side of said seat ring, said valve plug having a solid portion engageable by said seat ring upon its axial shifting thereagainst to close said flow passage, and said valve plug having a passaged portion at the outlet side of its solid portion, said passaged portion permitting fluid flow therethrough to said outlet end of said valve housing upon the axial shifting of said seat ring to disengagement from said solid portion of said valve plug; and

means engageable by a valve actuator for controlling the axial shifting of said seat ring between said valve closing and opening positions of engagement against and disengagement from said valve plug solid portion, said controlling means shifting said seat ring from without said flow passage of said valve housing.

2. A valve according to claim 1, wherein the flow-passage-exposed parts are of corrosion-proof plastic construction.

3. A valve according to claim 1, wherein the flow-passage-exposed parts are constructed of Teflon.

4. A valve according to claim 1, wherein said housing provided, bellows outer end supporting means comprise rigid sleeves received in said housing at its said inlet and outlet ends and joined to said bellows at their said outer ends, said sleeves defining end-to-end, with said bellows and seat ring, the walls of said flow passage through said housing.

5. A valve according to claim 4, wherein said sleeves comprise a corrosion-proof plastic having strengthening metal filler particles embedded therein.

6. A valve according to claim 5, wherein the plastic is Teflon and the metal filler is carbon.

7. A valve according to claim 4, and packings sealing between said rigid sleeves and said housing.

8. A valve according to claim 7, wherein said packings are engaged to said sleeves, and retainers releasably engaged to the ends of said housing and endwise clamping said packings.

9. A valve according to claim 8, wherein said packings are recessed in said sleeves and compressed also between said retainers and said housing ends.

10. A valve according to claim 4, wherein said valve plug is threaded into said outlet end sleeve, and a flange on said valve plug and overlying said sleeve to limit-stop the screwing of said valve plug into said outlet end sleeve.

11. A valve according to claim 1, and spring means received in said housing and arranged about said bellows at the inlet side of sAid seat ring, said spring means axially engaged between said seat ring and said housing normally to bias said seat ring to closing engagement against said valve plug.

12. A valve according to claim 1, wherein the material of said valve plug comprises Teflon impregnated with carbon particles.

13. A valve according to claim 1, wherein said seat ring controlling means comprises a guide sleeve received and sliding in said housing about said seat ring, means axially keying said guide sleeve to said seat ring, and means adapting said guide sleeve for engagement and shifting by an actuator.

14. A valve according to claim 13, wherein said axially keying means comprise a split elastic ring received in juxtaposed annular recesses in the inner and outer walls respectively of said guide sleeve and seat ring.

15. A valve according to claim 13, and a drive shaft extending without said housing;

and an actuator lever on said shaft; and

wherein said guide sleeve adapting means comprise means for translating rotary motion of said drive shaft to reciprocating motion of said guide sleeve.

16. A valve according to claim 15, wherein said translating means comprise a rack on said guide sleeve, and a cogwheel on said shaft and engaging said rack.