EP0409506B1 - A valve device - Google Patents

A valve device Download PDF

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Publication number
EP0409506B1
EP0409506B1 EP90307702A EP90307702A EP0409506B1 EP 0409506 B1 EP0409506 B1 EP 0409506B1 EP 90307702 A EP90307702 A EP 90307702A EP 90307702 A EP90307702 A EP 90307702A EP 0409506 B1 EP0409506 B1 EP 0409506B1
Authority
EP
European Patent Office
Prior art keywords
valve member
orifice
chamber
passageway
valve
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.)
Expired
Application number
EP90307702A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0409506A1 (en
Inventor
Kevin Mcdonald
Michael Harry Hardy
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.)
POLYPIPE PLC
Original Assignee
POLYPIPE PLC
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 POLYPIPE PLC filed Critical POLYPIPE PLC
Priority to AT90307702T priority Critical patent/ATE81376T1/de
Publication of EP0409506A1 publication Critical patent/EP0409506A1/en
Application granted granted Critical
Publication of EP0409506B1 publication Critical patent/EP0409506B1/en
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/12—Plumbing installations for waste water; Basins or fountains connected thereto; Sinks
    • E03C1/122—Pipe-line systems for waste water in building
    • E03C1/1222—Arrangements of devices in domestic waste water pipe-line systems
    • E03C1/1225—Arrangements of devices in domestic waste water pipe-line systems of air admittance valves
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/12—Plumbing installations for waste water; Basins or fountains connected thereto; Sinks
    • E03C1/122—Pipe-line systems for waste water in building

Definitions

  • the invention relates to a valve device, particularly an air admittance valve for a pipe, for example for air flow in stack pipes forming part of drainage arrangements such as domestic drainage.
  • EP-A-0100657 which describes an air admittance valve which can be fitted to the normally open upper end of a stack pipe whereby the stack pipe end is closed when conditions of atmospheric or greater than atmospheric pressure exist in the stack pipe, and is open when conditions of less than atmospheric pressure exist in the stack pipe.
  • a valve device for admitting air to a pipe, comprising a body adapted to be mounted on a pipe, a chamber in the body, and a first passageway open for communication between the chamber and, in use, the interior of a pipe, a second passageway which communicates with the chamber and with the exterior of the body through an opening in a boundary wall of the body and by an interior wall extending transversely of the chamber and defining a through orifice forming part of the second passageway, and by a valve member associated with the through orifice the arrangement being such that when the pressure in the chamber and ambient pressure are substantially equal the valve member obturates the through orifice and when the pressure in the chamber falls below ambient the valve member opens the through orifice for passage of ambient air through the second passageway to the chamber and thence to the first passageway, as known from EP-A-0 100 657 in accordance with the preamble of claim 1 characterised by the second passageway being formed by two opposite openings in the boundary wall of the device and by
  • the guide means may comprise a spigot projecting from an end closure of the chamber and a blind socket in the valve member, and the spigot and socket may be mounted in sliding engagement so that the socket rises and falls on the spigot for guiding the valve member to open and obturate the through orifice.
  • the guide means may comprise a peripheral flange upstanding from the interior wall and of a size and height sufficient to receive the periphery of the valve member for guiding the valve member to open and obturate the through orifice. This provides an alternative guide for the valve member which also provides for repeatability of the valving operation.
  • the guide means may comprise a cruciform structure depending from the valve member and a complementary structure carried by the interior wall, the cruciform structures being in slidable engagement for guiding the valve member to open and obturate the through orifice.
  • the periphery of the through orifice may have an upstanding flange which forms a seat on which the valve member is received in a position to obturate the through orifice. This provides for a positive seating and hence sealing of air flow through the device.
  • valve member There may preferably be a flexible annular seal secured to the underside of the valve member and adapted to seat on the upstanding flange in the obturating position. This construction also enhances the sealing effect.
  • the end closure may comprise a cap with a depending skirt.
  • the depending skirt may extend to the lower, in use, level of the opening.
  • valve device 1 for admitting air to a pipe such as a stack pipe 2 in a domestic toilet system is shown.
  • the valve device 1 comprises a body 3 adapted to be mounted on the pipe 2 at an open end 4 of the body 3 which has a closed end provided by an end closure or a cap 5 with a depending skirt 6 which reaches to the lower (as viewed) limit of an opening 7 in the body 3 to atmospheric air.
  • a valve member 13 which has guide means in the form of a cruciform 21 construction depending from the valve member 13 which seats on an 'O'-ring 22 mounted in grooves 23 in an annular internal wall 24, from which also depends a cruciform structure 25 complementary to that of the valve member 13 to guide it during upward and downward movements.
  • the cruciform structure 21, 25 allows the provision of two openings 7 to atmosphere, which can provide for a balanced admittance of air.
  • the cap 5 may be screw engaged or a push fit on the body 3.
  • valve device 1 In use, the valve device 1 is pushed onto the pipe 2, the internal pressure of which is normally atmospheric or slightly greater than atmospheric.
  • the pressure in the pipe 2 is applied to the upper (as viewed) surface of the valve member 13 which seats on the 'O'-ring 22 and closes the interior of the pipe 1 off to atmosphere, as shown in Fig. 1. This is because the underside of the valve member 13 is exposed to atmospheric pressure through the openings 7, and differential pressure and the weight of the valve member 13 cause it to sit down on the 'O'-ring 22.
  • valve member 13 If now the pressure in the pipe 2 falls for any reason the upper surface of the valve member 13 is subject to less than atmospheric pressure.
  • the underside is however still subject to atmospheric pressure through openings 7 so differential pressure between the outside of the pipe 2 (ambient or atmospheric) and the inside acts to lift the valve member 13 off its seating so that the valve device 1 opens to admit air into the stack pipe to keep noxious effluvia from entering the atmosphere.
  • the valve member 13 On return to normal pressure in the stack pipe 1, the valve member 13 resumes the position shown to close the valve, again preventing expulsion of noxious effluvia.
  • valve device 30 has a body 31 which has a part for mounting on a stack pipe 2, and an end closure or cap 32 which is a push fit on an upstanding peripheral boundary wall part 33 which terminates in a rebated edge 34 for receiving sealing means such as an 'O'-ring 35 so that when the end closure or cap 32 is mounted on the wall 33, a depending skirt 36 thereof is in close-sliding engagement with the wall, which is received between the skirt and an annular flange 37, also with a close-sliding fit, the 'O'-ring 35 providing an air-tight seal.
  • sealing means such as an 'O'-ring 35
  • the boundary wall part 33 is formed to provide an internal wall 38 with a central through orifice 39 the periphery of which is provided with an upstanding flange, nib or nose 40 which is rounded upwardly (as viewed).
  • the body 31 also has spaced from the internal wall 38 a raised crown 41 which extends across the diameter except at two diametrically opposed upstanding wall parts 41 a , 41 b , which are spaced from the boundary wall 33 and terminate short of the upper (as viewed) edge 34 thereof and provide entry to two parts 42 a , 42 b , of a first passageway 42 which communicates the interior of the body 31 below the crown 41 with a chamber 43 formed in the upper (as viewed) part interiorly of the wall 33 below the end closure 32.
  • the boundary wall of the body 31 is perforated by two openings 44 which are diametrically opposed and which communicate ambient air externally of the valve device 30 with the through orifice 39, the through orifice 39 and openings 44 comprising a second passageway.
  • valve member 45 in the form of a valve disc 46 having an integral socket 47 in which is received a spigot 48 depending centrally from the end closure 32.
  • the spigot 48 and socket or well 47 have a sliding relation, and there being on the underside (as viewed) of the disc 46 a rubber seal disc 49 which is held in place by a circlip 50 round the socket 47.
  • the underside of the disc is chamfered or tapered upwardly as shown in Fig. 6, so that in the Fig. 5 position the rubber seal disc 50 is pressed against the disc 46 by the nose 40.
  • the pressure on the upper (as viewed) side of the valve member 45 is equal to that on the underside (as viewed) and the valve member sits down on the nose 40 to seal the device 30 against passage of air into the device or air/gases out of the device 40 (Fig. 5).
  • valve member 45 When however pressure in the stack pipe 2 falls to below atmospheric (ambient) pressure, the balance is upset and the pressure below the valve member 45 is greater than that above it, that is bearing on the upper (as viewed) surface of the valve disc 46. The valve member 45 then lifts off the nose 40 (Fig. 6) so allowing air to pass from atmosphere through the openings 44 and through the through orifice 39 into the chamber 43 and thence down the first passageways 42 a , 42 b , into the stack pipe 2, so keeping noxious effluvia in the stack pipe and preventing their escape to atmosphere.
  • valve member 45 When the atmosphere internally and externally of the valve device 30 balances once more, the valve member 45 instantaneously drops onto the nose 40 to seal off the interior from the exterior once more, the socket 47 sliding over the spigot 48 to accommodate this movement.
  • the guide means provided by the spigot 48 and socket 47 may be replaced by an annular guide wall 51 upstanding from the wall 38 and of sufficient diameter just to accommodate the diameter of the valve disc 46.
  • valve devices described may be made by any suitable material as by being moulded from plastic such as ABS.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
  • Fluid-Driven Valves (AREA)
  • Closing Of Containers (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Polarising Elements (AREA)
  • Details Of Valves (AREA)
  • Check Valves (AREA)
  • Compressor (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Gas Separation By Absorption (AREA)
EP90307702A 1989-07-21 1990-07-13 A valve device Expired EP0409506B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90307702T ATE81376T1 (de) 1989-07-21 1990-07-13 Klappenvorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB898916772A GB8916772D0 (en) 1989-07-21 1989-07-21 A valve
GB8916772 1989-07-21

Publications (2)

Publication Number Publication Date
EP0409506A1 EP0409506A1 (en) 1991-01-23
EP0409506B1 true EP0409506B1 (en) 1992-10-07

Family

ID=10660452

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90307702A Expired EP0409506B1 (en) 1989-07-21 1990-07-13 A valve device

Country Status (9)

Country Link
EP (1) EP0409506B1 (enrdf_load_stackoverflow)
AT (1) ATE81376T1 (enrdf_load_stackoverflow)
DE (1) DE69000380T2 (enrdf_load_stackoverflow)
DK (1) DK0409506T3 (enrdf_load_stackoverflow)
ES (1) ES2035709T3 (enrdf_load_stackoverflow)
GB (1) GB8916772D0 (enrdf_load_stackoverflow)
GR (1) GR3006712T3 (enrdf_load_stackoverflow)
IE (1) IE65116B1 (enrdf_load_stackoverflow)
PT (1) PT94767B (enrdf_load_stackoverflow)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5273068A (en) * 1993-04-20 1993-12-28 Duren Gary S Air admittance valve for resisting high internal pressure
EP1026329A1 (en) * 1999-02-03 2000-08-09 Kurt Sture Birger Ericson Air admittance valve for sanitary waste pipe system
US6308731B1 (en) * 1999-06-25 2001-10-30 Itz Corporation Vent valve
US6415816B1 (en) * 2000-08-31 2002-07-09 Cherne Industries Incorporated Air admittance valve assembly
AU2005239719B1 (en) * 2005-05-27 2006-07-20 A.D. & R.E. Barker Pty Ltd Closures for Pipes
US7270146B1 (en) * 2006-12-15 2007-09-18 Wilhelmina E. E. Johnston Air vent valve
US8136548B2 (en) 2008-08-08 2012-03-20 Watertite Products, Inc. Air admittance valve
EP2224066A1 (en) * 2009-02-25 2010-09-01 Studor S.A. Air admittance valve
DK2241686T3 (da) * 2009-04-06 2012-08-27 Studor Sa Luftindgangsventil med høj kapacitet til sanitære afløbsrørsystemer
DE102010052321A1 (de) * 2009-11-26 2013-07-04 Abu-Plast Kunststoffbetriebe Gmbh Lüftungsvorrichtung für einen Volumenkörper
US9416986B2 (en) 2013-06-24 2016-08-16 The Rectorseal Corporation Valve for roof vent
US9683355B2 (en) 2014-04-28 2017-06-20 Ips Corporation Air admittance valve

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2112906B (en) * 1980-12-29 1984-12-12 Mcalpine And Company Limited Vacuum relief valve
DE3367014D1 (en) * 1982-07-29 1986-11-20 Kentsub Ltd Air admittance valve
GB8703132D0 (en) * 1987-02-11 1987-03-18 Earl R F Air admittance valve

Also Published As

Publication number Publication date
PT94767B (pt) 1997-10-31
IE65116B1 (en) 1995-10-04
DK0409506T3 (da) 1992-11-23
EP0409506A1 (en) 1991-01-23
ATE81376T1 (de) 1992-10-15
IE902500A1 (en) 1991-02-13
DE69000380D1 (de) 1992-11-12
DE69000380T2 (de) 1993-04-08
GB8916772D0 (en) 1989-09-06
PT94767A (pt) 1992-01-31
GR3006712T3 (enrdf_load_stackoverflow) 1993-06-30
ES2035709T3 (es) 1993-04-16

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