EP0088861A3 - Back flow preventer, especially for water supply conduits - Google Patents

Back flow preventer, especially for water supply conduits Download PDF

Info

Publication number
EP0088861A3
EP0088861A3 EP83100098A EP83100098A EP0088861A3 EP 0088861 A3 EP0088861 A3 EP 0088861A3 EP 83100098 A EP83100098 A EP 83100098A EP 83100098 A EP83100098 A EP 83100098A EP 0088861 A3 EP0088861 A3 EP 0088861A3
Authority
EP
European Patent Office
Prior art keywords
upstream
downstream
chamber
piston
compartment
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
EP83100098A
Other languages
German (de)
Other versions
EP0088861B1 (en
EP0088861A2 (en
Inventor
Peter Hoffmann
Walter Evers
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.)
Ecolab Engineering GmbH
Original Assignee
Lang Apparatebau GmbH
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 Lang Apparatebau GmbH filed Critical Lang Apparatebau GmbH
Priority to AT83100098T priority Critical patent/ATE22584T1/en
Publication of EP0088861A2 publication Critical patent/EP0088861A2/en
Publication of EP0088861A3 publication Critical patent/EP0088861A3/en
Application granted granted Critical
Publication of EP0088861B1 publication Critical patent/EP0088861B1/en
Expired legal-status Critical Current

Links

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
    • E03C1/02—Plumbing installations for fresh water
    • E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
    • E03C1/104—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves using a single check valve
    • 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
    • E03C1/02—Plumbing installations for fresh water
    • E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
    • E03C1/108—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves having an aerating valve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2544—Supply and exhaust type
    • Y10T137/2557—Waste responsive to flow stoppage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/3149—Back flow prevention by vacuum breaking [e.g., anti-siphon devices]
    • Y10T137/3185—Air vent in liquid flow line
    • Y10T137/3294—Valved
    • Y10T137/3331—With co-acting valve in liquid flow path

Abstract

A backflow-preventing valve for connection between a high-pressure input line and a lower-pressure output line has a valve housing forming upstream and downstream chambers and having an inlet opening into the upstream chamber remote from the downstream chamber, a vent opening into the upstream chamber offset from the inlet, and an outlet opening into the downstream chamber. A check valve in the downstream chamber allows flow only from the upstream chamber into the downstream chamber. A tubular piston sealingly engaged across the upstream chamber upstream of the vent, formed with a throughgoing bore, and having a downstream end engageable with the check valve is movable between an upstream position with its downstream end in the upstream chamber spaced from the check valve and a downstream position with its downstream end engaged sealingly with the check valve. Fluid flow through the bore from the inlet to the vent is only possible in and between the upstream position and an intermediate position of the piston. A spring urges the piston into the upstream position. A valve body fixed in the housing and sealingly engageable in the piston bore in and between the intermediate and upstream positions of the piston subdivides the upstream chamber into an upstream compartment into which the inlet opens and a downstream compartment into which the outlet and downstream chamber open. This valve body is spaced from the piston and permits free fluid exchange between the compartments between the downstream and intermediate positions of the piston and is formed with a small-diameter bleed passage opening at one side in the upstream compartment and at the other side in the downstream compartment.
EP83100098A 1982-03-15 1983-01-07 Back flow preventer, especially for water supply conduits Expired EP0088861B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83100098T ATE22584T1 (en) 1982-03-15 1983-01-07 PIPE SEPARATOR, ESPECIALLY FOR DRINKING WATER LINES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19828207222U DE8207222U1 (en) 1982-03-15 1982-03-15 PIPE DISCONNECTOR, IN PARTICULAR FOR DRINKING WATER PIPES
DE8207222U 1982-03-15

Publications (3)

Publication Number Publication Date
EP0088861A2 EP0088861A2 (en) 1983-09-21
EP0088861A3 true EP0088861A3 (en) 1985-05-15
EP0088861B1 EP0088861B1 (en) 1986-10-01

Family

ID=6738028

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83100098A Expired EP0088861B1 (en) 1982-03-15 1983-01-07 Back flow preventer, especially for water supply conduits

Country Status (5)

Country Link
US (1) US4518006A (en)
EP (1) EP0088861B1 (en)
AT (1) ATE22584T1 (en)
CH (1) CH656663A5 (en)
DE (2) DE8207222U1 (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3444300A1 (en) * 1984-12-05 1986-06-05 Lang Apparatebau GmbH, 8227 Siegsdorf PIPE DISCONNECTOR, IN PARTICULAR FOR DRINKING WATER PIPES
US4672991A (en) * 1986-04-01 1987-06-16 Badders Edwin T Back flow prevention valve
US5163465A (en) * 1991-09-20 1992-11-17 King Lloyd H Sr Vacuum breaker venting valve
US5425393A (en) * 1993-12-15 1995-06-20 Zurn Industries, Inc. Backflow prevention and detection system
JP3514684B2 (en) * 1999-12-22 2004-03-31 兼工業株式会社 Water hammer prevention device
US6675110B2 (en) 2002-01-15 2004-01-06 Watts Regulatoryco. Testing valve assemblies
PL359448A1 (en) * 2002-04-03 2003-10-06 Hans Sasserath & Co Kg Set of isolating valves for water supply system
US6910495B2 (en) * 2003-02-06 2005-06-28 Anthony P. Lafalce Backflow prevention system
US20050224114A1 (en) * 2004-04-07 2005-10-13 Christopher Michael Cook Breakaway pipe coupling with automatic shutoff
JP4559824B2 (en) * 2004-11-08 2010-10-13 株式会社豊田自動織機 Hydraulic circuit
DE102005049110B4 (en) 2005-10-11 2007-05-31 Hans Sasserath & Co. Kg Sealing strength reinforced pipe separator
MX2021005196A (en) 2018-11-09 2021-07-15 Flowserve Man Co Methods and valves including flushing features.
MX2021005197A (en) 2018-11-09 2021-07-15 Flowserve Man Co Fluid exchange devices and related controls, systems, and methods.
CA3119312A1 (en) 2018-11-09 2020-05-14 Flowserve Management Company Fluid exchange devices and related controls, systems, and methods
CN116123155A (en) 2018-11-09 2023-05-16 芙罗服务管理公司 Piston and method for use in a fluid exchange device
US10865810B2 (en) 2018-11-09 2020-12-15 Flowserve Management Company Fluid exchange devices and related systems, and methods
CA3119069A1 (en) 2018-11-09 2020-05-14 Flowserve Management Company Fluid exchange devices and related controls, systems, and methods
AU2020401951A1 (en) 2019-12-12 2022-05-19 Flowserve Pte. Ltd. Fluid exchange devices and related controls, systems, and methods
US11746509B2 (en) * 2021-09-01 2023-09-05 Kenny Bassett Backflow prevention device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3067770A (en) * 1959-10-29 1962-12-11 Siegler Inc Two-way pressure responsive flow valve
AU465123B2 (en) * 1973-10-02 1975-09-03 Improvements in or relating to devices for preventing back flow in fluid supply systems
DE2418035B2 (en) * 1974-04-13 1978-01-19 Alfred Waletzko Apparatebau, 5820 Gevelsberg PIPE BREAKER
DE2747941A1 (en) * 1977-10-26 1979-05-10 Waletzko Alfred Apparatebau Prevention of waste backflow into drinking water duct - using hydraulically linked pressure control valve to interrupt or release supply
US4159025A (en) * 1977-05-06 1979-06-26 Telford L. Smith Back flow preventer valve
DE3207964A1 (en) * 1981-04-16 1982-11-11 Gerson GmbH, 4400 Münster Backflow preventer for flowing media in conduits

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2953153A (en) * 1958-02-28 1960-09-20 Leslie C Gaul Vented safety check valve
US3083723A (en) * 1959-11-04 1963-04-02 Paul J Duchin Vacuum breaker
US3114382A (en) * 1962-04-30 1963-12-17 Elva J Karshner Backflow preventing valve
US3905382A (en) * 1973-09-28 1975-09-16 William Waterston Back flow preventor
US4013088A (en) * 1975-05-19 1977-03-22 Braukmann Armaturen Ag Valve structure
US4044787A (en) * 1976-03-19 1977-08-30 Rockwell International Corporation Backflow preventer and relief valve assembly
US4232704A (en) * 1978-03-28 1980-11-11 Amtrol Inc. In line back flow preventer
FR2469630B1 (en) * 1979-11-12 1986-02-14 Frisquet Anc Ets M DISCONNECTOR FOR DRINKING WATER PIPING

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3067770A (en) * 1959-10-29 1962-12-11 Siegler Inc Two-way pressure responsive flow valve
AU465123B2 (en) * 1973-10-02 1975-09-03 Improvements in or relating to devices for preventing back flow in fluid supply systems
DE2418035B2 (en) * 1974-04-13 1978-01-19 Alfred Waletzko Apparatebau, 5820 Gevelsberg PIPE BREAKER
US4159025A (en) * 1977-05-06 1979-06-26 Telford L. Smith Back flow preventer valve
DE2747941A1 (en) * 1977-10-26 1979-05-10 Waletzko Alfred Apparatebau Prevention of waste backflow into drinking water duct - using hydraulically linked pressure control valve to interrupt or release supply
DE3207964A1 (en) * 1981-04-16 1982-11-11 Gerson GmbH, 4400 Münster Backflow preventer for flowing media in conduits

Also Published As

Publication number Publication date
DE8207222U1 (en) 1982-08-05
EP0088861B1 (en) 1986-10-01
DE3366493D1 (en) 1986-11-06
ATE22584T1 (en) 1986-10-15
EP0088861A2 (en) 1983-09-21
CH656663A5 (en) 1986-07-15
US4518006A (en) 1985-05-21

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