NON-RETURN FLAP VALVE

Non-return flap valve for particular use in forced circulation pipe systems, especially for nuclear power stations. It solves the problem of providing a certain minimum flow through the flap valve in case of reverse flow with complete closure occurring upon the reverse flow reaching a certain pressu...

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Bibliographische Detailangaben
Hauptverfasser:	HARAZIM, ALFONS, KERLIN, KURT, ROCEK, JAROSLAV
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ACTUATING-FLOATS BLASTING COCKS DEVICES FOR VENTING OR AERATING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING TAPS THERMAL INSULATION IN GENERAL VALVES WEAPONS
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Beschreibung
Zusammenfassung:	Non-return flap valve for particular use in forced circulation pipe systems, especially for nuclear power stations. It solves the problem of providing a certain minimum flow through the flap valve in case of reverse flow with complete closure occurring upon the reverse flow reaching a certain pressure. The valve consists in a swingable arrangement of a flap disc mounted on a pin whose axis is located above the flap disc at a distance (a) from the seating surface of the valve seat. The sealing surfaces of the seat and of the flap disc make an angle which enables a partial throughflow, the valve closing fully after a given pressure of the reverse flow is reached. The flow area of the partial throughflow is equal to 5-80 per cent of the maximum through-flow area of the valve seat.