GB2136540A - Valve with replaceable insert - Google Patents

Valve with replaceable insert Download PDF

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Publication number
GB2136540A
GB2136540A GB08406109A GB8406109A GB2136540A GB 2136540 A GB2136540 A GB 2136540A GB 08406109 A GB08406109 A GB 08406109A GB 8406109 A GB8406109 A GB 8406109A GB 2136540 A GB2136540 A GB 2136540A
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GB
United Kingdom
Prior art keywords
insert
valve
backup
backup member
deformable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB08406109A
Other versions
GB8406109D0 (en
GB2136540B (en
Inventor
Fletcher Horton Redwine
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
USS Engineers and Consultants Inc
Original Assignee
USS Engineers and Consultants Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by USS Engineers and Consultants Inc filed Critical USS Engineers and Consultants Inc
Publication of GB8406109D0 publication Critical patent/GB8406109D0/en
Publication of GB2136540A publication Critical patent/GB2136540A/en
Application granted granted Critical
Publication of GB2136540B publication Critical patent/GB2136540B/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/06—Check valves with guided rigid valve members with guided stems
    • F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/46—Attachment of sealing rings

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)
  • Check Valves (AREA)

Abstract

A valve member (14) having a replaceable deformable insert (24) installed in a groove (26) of the member and a deformable backup member (28) secured to the valve member, preferably by bonding, and abutting so as to abut at least a major portion of a transverse surface of the insert opposite a tapered seating surface (12) thereof. The insert may be of harder, more wear resistant material than the backup member for extending service life and permitting easier repair or replacement of the insert. <IMAGE>

Description

SPECIFICATION Valve with replaceable insert The present invention relates to poppet-type valves, and particularly to those having replaceable deformable sealing inserts.
Valves used in oil well mud pumps are subjectto severe abrasion and wear. The sealing element in such valves may need to be replaced after only a few hours of service. In some designs the sealing element is mechanicallyfastened so that it may be replaced separately. However, the mechanical fasteners tend to fail, for example, through loosening of a threaded elementora snap ring.Alowercostfastening method is provided by bonding the sealing elementto a metal valve member, butthis does not permit separate replacement of the sealing element. Another disadvantage is that materials which bond well do not have the best wear resistance.
It is a primary object of the present invention to provide a poppet-type valve member having a re placeableinsertofdeformablematerialwhich is attached in a manner significantly extending its service life.
According to one aspect ofthe present invention there is provided an assembly comprising a metal poppet-type valve member having a replaceable insert of deformable material installed in a groove in said member, said insert having a tapered annular seating surface for sealing contact with a seating surface of a companion valve member, and a deformable backup member secured to said first-mentioned valve member, said backup member abutting at least a major portion of a transverse surface of said insert opposite the tapered seating surface thereof, the extent of said transverse surface being defined by boundaries located in a direction parallel to the axis of said valve memberfrom opposed ends of said tapered surface of the insert.
According to a further aspect of the present invention there is provided a pump valve having a reciprocable metal valve member with an insert of deformable material installed in a groove therein, and a companion metal seat member, said insert and companion seat member having generally mateable tapered annular seating surfaces, said reciprocable valve member having a deformable backup member bonded thereto, said backup member abutting and providing sole supportfor at least a major portion of a transverse surface of said insert located opposite the seating surface thereof, the extent ofsaid transverse surface being defined by boundaries located in a direction parallel to the axis of said valve member from opposed ends of said tapered surface of the insert.
Preferably, the backup member is bonded to the metal valve member by conventional techniques and provides sole supportforthe aforementioned transverse surface of the insert in a direction parallel to the axis of the valve member. It is desirablethatthe insert be of material having a higher durometer hardness than the backup member, particularly ifthe backup member is bonded to the metal valve member. The wear resistance of the insert is increased to an even greater degree than would be expected based on its increased hardness. This is apparently due to a cushioning effect of the softer backup material. For valves to be used in mid pumps, the insert is preferably of polyurethane material, while the backup member is preferably of nitrile rubber.Valves for high temperature service and requiring greaterchemical resistance may have inserts ofteflon and backup members of piton material. Many other deformable materials would be suitable for use as inserts or backup members.
The invention will now be described further hereinafter, byway of example only, with reference to the accompanying drawing, which is a cross-section of a mud pump valve showing the preferred embodiment ofthe invention.
The sole figure shows a poppet-type valve used in oil well mud pumps. The valve includes a metal seat member 10 having an annular tapered seating surface 12. A reciprocable member 14 having wing guide lines 16 is slidably mounted in a passage 18 ofvalve cover 20. The reciprocable member may have a stem guide in place of the wing guides. Coil spring 22 urges member 14 into closed position. Deformable insert 24 has a surface ofgenerallymateabletaperwith the seating surface 12for making sealing contacttherewith. The insert is of polyurethane material having a durometer hardness of between 80 to 95. It fits into groove 26 in the reciprocable member. The insert ring is designed to have 1/8 inch diametral stretch so that it may be removed and replaced easily.Backup member 28 is of nitrile rubber material having a durometer hardness of 75 to 85, and is bonded to the backface of member 14. The same bonding techniques are used to secure memberl4as are now used in moulding conventional bonded insert types of valves. The backup member could be mechanically attached, but this is not preferred. The backup member has a groove 30 which is of circular arc shape of the same radius as the arc of the groove in the insert. Many other shapes of groove may be used, both in the insert and backup member. The thickness of the insert and backup member in the axial direction of the valve are generally about equal. However, the backup member may be two to three or more times thickerthan the insert if desired.
1. An assembly comprising a metal poppet-type valve member having a replaceable insert of deformable material installed in a groove in said member, said insert having a tapered annular seating surface for sealing contactwith a seating surface of a companion valve member, and a deformable backup member secured to said first-mentioned valve member, said backup member abutting at least a major portion of a transverse surface of said insert opposite the tapered seating surface thereof, the extent of said transverse surface being defined by boundaries located in a direction parallel to the axis of said valve memberfrom opposed ends of said tapered surface of the insert.
2. An assembly as claimed in claim 1, in which said deformable backup member is bonded to said firstmentioned metal valve member.
3. An assembly as claimed in claim 1, in which said
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (16)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Valve with replaceable insert The present invention relates to poppet-type valves, and particularly to those having replaceable deformable sealing inserts. Valves used in oil well mud pumps are subjectto severe abrasion and wear. The sealing element in such valves may need to be replaced after only a few hours of service. In some designs the sealing element is mechanicallyfastened so that it may be replaced separately. However, the mechanical fasteners tend to fail, for example, through loosening of a threaded elementora snap ring.Alowercostfastening method is provided by bonding the sealing elementto a metal valve member, butthis does not permit separate replacement of the sealing element. Another disadvantage is that materials which bond well do not have the best wear resistance. It is a primary object of the present invention to provide a poppet-type valve member having a re placeableinsertofdeformablematerialwhich is attached in a manner significantly extending its service life. According to one aspect ofthe present invention there is provided an assembly comprising a metal poppet-type valve member having a replaceable insert of deformable material installed in a groove in said member, said insert having a tapered annular seating surface for sealing contact with a seating surface of a companion valve member, and a deformable backup member secured to said first-mentioned valve member, said backup member abutting at least a major portion of a transverse surface of said insert opposite the tapered seating surface thereof, the extent of said transverse surface being defined by boundaries located in a direction parallel to the axis of said valve memberfrom opposed ends of said tapered surface of the insert. According to a further aspect of the present invention there is provided a pump valve having a reciprocable metal valve member with an insert of deformable material installed in a groove therein, and a companion metal seat member, said insert and companion seat member having generally mateable tapered annular seating surfaces, said reciprocable valve member having a deformable backup member bonded thereto, said backup member abutting and providing sole supportfor at least a major portion of a transverse surface of said insert located opposite the seating surface thereof, the extent ofsaid transverse surface being defined by boundaries located in a direction parallel to the axis of said valve member from opposed ends of said tapered surface of the insert. Preferably, the backup member is bonded to the metal valve member by conventional techniques and provides sole supportforthe aforementioned transverse surface of the insert in a direction parallel to the axis of the valve member. It is desirablethatthe insert be of material having a higher durometer hardness than the backup member, particularly ifthe backup member is bonded to the metal valve member. The wear resistance of the insert is increased to an even greater degree than would be expected based on its increased hardness. This is apparently due to a cushioning effect of the softer backup material. For valves to be used in mid pumps, the insert is preferably of polyurethane material, while the backup member is preferably of nitrile rubber.Valves for high temperature service and requiring greaterchemical resistance may have inserts ofteflon and backup members of piton material. Many other deformable materials would be suitable for use as inserts or backup members. The invention will now be described further hereinafter, byway of example only, with reference to the accompanying drawing, which is a cross-section of a mud pump valve showing the preferred embodiment ofthe invention. The sole figure shows a poppet-type valve used in oil well mud pumps. The valve includes a metal seat member 10 having an annular tapered seating surface 12. A reciprocable member 14 having wing guide lines 16 is slidably mounted in a passage 18 ofvalve cover 20. The reciprocable member may have a stem guide in place of the wing guides. Coil spring 22 urges member 14 into closed position. Deformable insert 24 has a surface ofgenerallymateabletaperwith the seating surface 12for making sealing contacttherewith. The insert is of polyurethane material having a durometer hardness of between 80 to 95. It fits into groove 26 in the reciprocable member. The insert ring is designed to have 1/8 inch diametral stretch so that it may be removed and replaced easily.Backup member 28 is of nitrile rubber material having a durometer hardness of 75 to 85, and is bonded to the backface of member 14. The same bonding techniques are used to secure memberl4as are now used in moulding conventional bonded insert types of valves. The backup member could be mechanically attached, but this is not preferred. The backup member has a groove 30 which is of circular arc shape of the same radius as the arc of the groove in the insert. Many other shapes of groove may be used, both in the insert and backup member. The thickness of the insert and backup member in the axial direction of the valve are generally about equal. However, the backup member may be two to three or more times thickerthan the insert if desired. CLAIMS
1. An assembly comprising a metal poppet-type valve member having a replaceable insert of deformable material installed in a groove in said member, said insert having a tapered annular seating surface for sealing contactwith a seating surface of a companion valve member, and a deformable backup member secured to said first-mentioned valve member, said backup member abutting at least a major portion of a transverse surface of said insert opposite the tapered seating surface thereof, the extent of said transverse surface being defined by boundaries located in a direction parallel to the axis of said valve memberfrom opposed ends of said tapered surface of the insert.
2. An assembly as claimed in claim 1, in which said deformable backup member is bonded to said firstmentioned metal valve member.
3. An assembly as claimed in claim 1, in which said deformable backup member provides sole support in a direction parallel to the axis of said valve member for at least a major portion of the transverse surface of said insert.
4. An assembly as claimed in claim 1, in which the groove in said first-mentioned metal valve member has a wall forming an arc of circular-shape and said deformable backup member has a groove for receipt ofthe insert with a wall forming an arc which is a continuation of said circular-shape arc of the firstmentioned metal valve member.
5. An assembly as claimed in claim 2, in which said deformable backup member provides sole support in a direction parallel to the axis of said valve memberfor at least about ninety percent (90% ) ofthe transverse surface of said insert.
6. An assembly as claimed in claim 2, in which said insert and backup member are of elastomeric material.
7. An assembly as claimed in claim 2, in which said insert and backup member have durometerA hardness within the range offrom about 80 to about 95 and from about 75 to about 85, respectively.
8. An assembly as claimed in claim 6, in which said insert and backup member are of polyurethane and nitrile rubber material, respectively.
9. An assembly as claimed in claim 2, in which the durometerA hardness of said insert is at least five (5) units greaterthan that of the backup member.
10. A pump valve having a reciprocable metal valve memberwith an insert of deformable material installed in a groove therein, and a companion metal seat member, said insert and companion seat mem ber having generally mateable tapered annular seating surfaces, said reciprocable valve member having a deformable backup member bonded thereto, said backup member abutting and providing sole support for at least a major portion of a transverse surface of said insert located opposite the seating surface thereof, the extent of said transverse surface being defined by boundaries located in a direction parallel to the axis of said valve memberfrom opposed ends of said tapered surface of the insert.
11. A pumpvalveas claimed in claim lOin which the durometerA hardness of said insert and backup member are within ranges of from about 80 to about 95 and from about 75 to about 85, respectively.
12. A pump valve as claimed in claim 10 in which said backup member provides sole supportfor at least 90 percent (90%) of said opposite transverse surface ofthe insert.
13. Apumpvalveasclaimedinclaim 10,wherein said insert and backup member are of elastomeric material.
14. A pump valve as claimed in claim 10, wherein the durometerA hardness of said insert as at leastfive (5) units greaterthan that ofthe backup member.
15. An assembly constructed and adapted to operate substantially as herein described with refer pence to and as illustrated by the accompanying drawing.
16. A pump valve, constructed and adapted to operate substantially as herein described with refer pence to and as illustrated by the accompanying drawing.
GB08406109A 1983-03-10 1984-03-08 Valve with replaceable insert Expired GB2136540B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US47408283A 1983-03-10 1983-03-10

Publications (3)

Publication Number Publication Date
GB8406109D0 GB8406109D0 (en) 1984-04-11
GB2136540A true GB2136540A (en) 1984-09-19
GB2136540B GB2136540B (en) 1986-04-09

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ID=23882118

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08406109A Expired GB2136540B (en) 1983-03-10 1984-03-08 Valve with replaceable insert

Country Status (4)

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AU (1) AU2553684A (en)
BR (1) BR8401069A (en)
GB (1) GB2136540B (en)
IN (1) IN160557B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2629554A1 (en) * 1988-04-01 1989-10-06 Belles Ondes Forges VALVE FOR FLUID, IN PARTICULAR PNEUMATIC VALVE FOR COMPRESSED AIR WARNING
WO2009035864A2 (en) * 2007-09-11 2009-03-19 Fisher Controls International Llc Metal sealing disk having an elastomeric backing for use with fluid regulators
WO2015157352A1 (en) * 2014-04-08 2015-10-15 Emerson Process Management Regulator Technologies, Inc. Flow path velocity modifier for a control valve
CN105840889A (en) * 2016-06-04 2016-08-10 江苏神通阀门股份有限公司 Lifting type check valve

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB655560A (en) * 1947-09-30 1951-07-25 British Oilfield Equipment Com Improvements in or relating to valves for slush and like pumps
GB702875A (en) * 1952-04-30 1954-01-27 Flight Refueling Ltd Improvements in fluid sealing devices applicable to valves

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB655560A (en) * 1947-09-30 1951-07-25 British Oilfield Equipment Com Improvements in or relating to valves for slush and like pumps
GB702875A (en) * 1952-04-30 1954-01-27 Flight Refueling Ltd Improvements in fluid sealing devices applicable to valves

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2629554A1 (en) * 1988-04-01 1989-10-06 Belles Ondes Forges VALVE FOR FLUID, IN PARTICULAR PNEUMATIC VALVE FOR COMPRESSED AIR WARNING
EP0337848A1 (en) * 1988-04-01 1989-10-18 Forges de Belles Ondes Pneumatic double valve, more particularly for compressedair horn
WO2009035864A2 (en) * 2007-09-11 2009-03-19 Fisher Controls International Llc Metal sealing disk having an elastomeric backing for use with fluid regulators
WO2009035864A3 (en) * 2007-09-11 2009-08-13 Fisher Controls Int Metal sealing disk having an elastomeric backing for use with fluid regulators
WO2015157352A1 (en) * 2014-04-08 2015-10-15 Emerson Process Management Regulator Technologies, Inc. Flow path velocity modifier for a control valve
CN105042095A (en) * 2014-04-08 2015-11-11 艾默生过程管理调节技术公司 Flow path velocity modifier for a control valve
US9470337B2 (en) 2014-04-08 2016-10-18 Emerson Process Management Regulator Technologies, Inc. Flow path velocity modifier for a control valve
RU2686647C2 (en) * 2014-04-08 2019-04-29 Эмерсон Процесс Менеджмент Регьюлэйтор Текнолоджиз, Инк. Device for changing speed in flow channel for regulating valve
CN105042095B (en) * 2014-04-08 2020-09-08 艾默生过程管理调节技术公司 Flow path velocity regulator for control valve
CN105840889A (en) * 2016-06-04 2016-08-10 江苏神通阀门股份有限公司 Lifting type check valve

Also Published As

Publication number Publication date
IN160557B (en) 1987-07-18
GB8406109D0 (en) 1984-04-11
GB2136540B (en) 1986-04-09
BR8401069A (en) 1984-10-16
AU2553684A (en) 1984-09-13

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PCNP Patent ceased through non-payment of renewal fee