Système de vanne à double obturation et aération

Double block and vent valve system

System mit Doppelsitz- und Entlüftungsventil

Abstract

A double block and vent valve (2) comprises a housing having an inlet (4) and an outlet (6) for introducing and discharging fluid to and from the valve and is defined at its ends by a first portion (18) and an opposite second portion (20̸). The valve includes a flow directing throat (52) disposed within the housing and interposed between the inlet and the outlet for communicating fluid therethrough and has a means for venting leached or trapped fluid externally of it. The flow directing throat has a flow discharging end portion (53) associated with the housing first portion and has an opposite flow receiving end portion (51) associated with the housing second portion. The flow receiving end portion and the discharging end portion of the flow directing throat are sized diametrically differently relative to one another such that fluid flow passing through the flow directing throat from the inlet to the outlet does so without substantially impeding its flow path.

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Description

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Patent Citations (7)

    Publication numberPublication dateAssigneeTitle
    EP-0122323-A1October 24, 1984Apv Rosista GmbhDoppelsitzventil mit zwei Ventiltellern
    EP-0174384-A1March 19, 1986Lavrids Knudsen Maskinfabrik A/SDoppelsitzventil
    FR-1459004-AApril 29, 1966Gaz De FranceVanne de sûreté avec mise à l'air libre
    FR-2382636-A1September 29, 1978Pillard ChauffageDouble seated valve for toxic gases - has vent between seats closed automatically when valve is open
    GB-2091852-AAugust 04, 1982Cherry Burrell CorpDouble block and vent valve
    GB-2136537-ASeptember 19, 1984Cherry Burrell CorpActuator mechanism for double-block and vent valve
    US-4798223-AJanuary 17, 1989Skotch, Inc.Double block and vent valve system

NO-Patent Citations (0)

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Cited By (4)

    Publication numberPublication dateAssigneeTitle
    EP-0583166-A2February 16, 1994Whitey Co.Strömungsschaltvorrichtung für einen Prozessanalysator
    EP-0583166-A3February 08, 1995Whitey CoStrömungsschaltvorrichtung für einen Prozessanalysator.
    EP-0771977-A3May 14, 1997Whitey Co.Module de soupape d'arrêt et de décharge
    EP-2930407-B1January 25, 2017Linde AktiengesellschaftVentilanordnung