DK1604071T3 - Device for preventing backflow - Google Patents

Device for preventing backflow

Info

Publication number
DK1604071T3
DK1604071T3 DK04717625T DK04717625T DK1604071T3 DK 1604071 T3 DK1604071 T3 DK 1604071T3 DK 04717625 T DK04717625 T DK 04717625T DK 04717625 T DK04717625 T DK 04717625T DK 1604071 T3 DK1604071 T3 DK 1604071T3
Authority
DK
Denmark
Prior art keywords
housing
valve body
seal
discharge channel
sealing edge
Prior art date
Application number
DK04717625T
Other languages
Danish (da)
Inventor
Robert Nathan
Original Assignee
Kaercher Gmbh & Co Kg Alfred
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 Kaercher Gmbh & Co Kg Alfred filed Critical Kaercher Gmbh & Co Kg Alfred
Application granted granted Critical
Publication of DK1604071T3 publication Critical patent/DK1604071T3/en

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
    • E03C1/106—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves using two or more check valves
    • 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
    • F16K15/066—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring with a plurality of valve members

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Regulation And Control Of Combustion (AREA)

Abstract

The invention relates to a device for preventing backflow (1), comprising a housing (2) provided with an inlet and an outlet forming a flow path leading from the inlet to the outlet; two return valves (9, 10, 23, 30) which open out into the direction of flow and which are arranged behind each other; a discharge channel (16) which discharges from the intermediate area between the two return valves; a valve body (17) which seals the discharge channel (16) inside the housing and which is sealingly displaceable in relation thereto inside the housing, said valve body being displaced by the effect of a spring in order to occupy an open position in which the discharge channel is released and occupying a closed position when the housing is cross-flown counter to the effect of the spring, receiving therein the return valve, which is arranged downstream. The aim of the invention is to improve the seal between the valve body and the housing. This is achieved by provided a membrane seal (18) which seals the valve body in relation to the housing. The outer edge area of said seal is fixed on the inner wall of the housing such that it is tight and the inner edge area is fixed inside a sealing edge (19) of the valve body making the latter tight. The membrane seal extends above the sealing edge and the valve body, when in a closed position, rests against a sealing seat (21) of the housing with the sealing edge and an intermediate layer of the membrane seal.
DK04717625T 2003-03-14 2004-03-05 Device for preventing backflow DK1604071T3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE10311252A DE10311252B3 (en) 2003-03-14 2003-03-14 Backflow preventer

Publications (1)

Publication Number Publication Date
DK1604071T3 true DK1604071T3 (en) 2007-01-02

Family

ID=32980592

Family Applications (1)

Application Number Title Priority Date Filing Date
DK04717625T DK1604071T3 (en) 2003-03-14 2004-03-05 Device for preventing backflow

Country Status (8)

Country Link
EP (1) EP1604071B1 (en)
CN (1) CN100547179C (en)
AT (1) ATE337443T1 (en)
AU (1) AU2004219971B2 (en)
DE (1) DE10311252B3 (en)
DK (1) DK1604071T3 (en)
ES (1) ES2271859T3 (en)
WO (1) WO2004081301A1 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004044850B3 (en) * 2004-09-10 2006-06-22 Alfred Kärcher Gmbh & Co. Kg backflow preventer
DE102005010139B4 (en) * 2004-12-29 2013-11-28 Hans Sasserath & Co. Kg Pipe separator arrangement
DE102004063747B4 (en) * 2004-12-29 2006-10-26 Hans Sasserath & Co Kg Pipe separator arrangement
CN2915968Y (en) 2006-06-08 2007-06-27 上海澳柯林水暖器材有限公司 Anti-siphon device for flushing valve
GB0709906D0 (en) * 2007-05-23 2007-07-04 Anson Ltd Valves
CN102147026A (en) * 2010-02-10 2011-08-10 天津市国威给排水设备制造有限公司 Micro backflow preventer
CN101852302B (en) * 2010-05-24 2011-08-31 杭州春江阀门有限公司 Low-resistance self-discharge backflow preventer
FR2995654B1 (en) * 2012-09-17 2014-10-24 Tech Concept Medical CONNECTING PLUG COMPRISING A MONOBLOC BODY HAVING A MAINTENANCE VALVE AND A MAIN VALVE
CN103016798A (en) * 2012-12-08 2013-04-03 中国航天科技集团公司第六研究院第十一研究所 Double-spool series high-pressure redundant sealing check valve
CN104315205A (en) * 2014-10-23 2015-01-28 天津市国威给排水设备制造有限公司 Leakproof backflow-preventing valve
CN104728476A (en) * 2015-03-23 2015-06-24 中国石油大学(北京) One-way valve
CN106051232B (en) * 2016-07-12 2018-08-24 上海空间推进研究所 A kind of check valve and its working method suitable for big flow working range
CN106224599B (en) * 2016-08-29 2018-07-10 约翰斯顿流体科技（无锡）有限公司 A kind of multistage check-valves
DE102017118260B4 (en) * 2017-08-10 2024-02-01 Alfmeier Präzision SE Valve and valve arrangement
DE102018217449B4 (en) * 2018-10-11 2023-01-26 Vitesco Technologies GmbH Valve
TR202013269A1 (en) * 2020-08-21 2022-03-21 Serdar Plastik Sanayi Ve Ticaret Anonim Sirketi Disconnector (Backflow Preventer)

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2157363A1 (en) * 1971-11-19 1973-05-24 Guenter Preuss PIPE BREAKER FOR LIQUID LINES
US3818929A (en) * 1973-04-23 1974-06-25 H Braukmann Reduced pressure backflow preventer valve
DE2414893C2 (en) * 1974-03-28 1985-01-17 Honeywell-Braukmann GmbH, 6950 Mosbach Backflow preventer
DE2424978C2 (en) * 1974-05-22 1985-01-10 Honeywell-Braukmann GmbH, 6950 Mosbach Pipe interrupter, in particular for domestic water pipes
US4013089A (en) * 1975-09-17 1977-03-22 Braukmann Armaturen Ag Back flow preventer valve
US5228471A (en) * 1992-05-18 1993-07-20 Hoeptner Iii Herbert W Automatic draining back flow preventer
US5503229A (en) * 1994-09-09 1996-04-02 Camco International Inc. Equalizing subsurface safety valve
US6050295A (en) * 1998-06-04 2000-04-18 Fastest, Inc. High flow valved fitting
DE19854951C2 (en) * 1998-11-27 2001-11-15 Rudolf Vollmer System separator
DE19902574C1 (en) * 1999-01-22 2000-10-05 Rudolf Vollmer System separator
JP3162037B2 (en) * 1999-06-29 2001-04-25 兼工業株式会社 Backflow prevention device
CN1280258A (en) * 1999-07-09 2001-01-17 沈锝桓 Improved pressure storage tube flow regulating valve
US6237631B1 (en) * 1999-08-19 2001-05-29 Parker-Hannifin Corporation Low spill quick disconnect coupling
DE10103374A1 (en) * 2001-01-26 2002-08-01 Sasserath & Co Kg H backflow

Also Published As

Publication number Publication date
EP1604071A1 (en) 2005-12-14
AU2004219971B2 (en) 2007-05-31
DE10311252B3 (en) 2004-12-09
CN1761792A (en) 2006-04-19
CN100547179C (en) 2009-10-07
ES2271859T3 (en) 2007-04-16
ATE337443T1 (en) 2006-09-15
WO2004081301A1 (en) 2004-09-23
AU2004219971A1 (en) 2004-09-23
EP1604071B1 (en) 2006-08-23

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