Piston type pressure-releasing and pressure-keeping valve

The utility model discloses a piston type pressure-releasing and pressure-keeping valve, which is composed of a main valve, a constant pressure guide valve and a connecting pipe, wherein, a valve clack of the main valve is positioned on an outlet of a valve seat and is interlocked with a control mec...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	LINCHUN ZHAO
Format:	Patent
Sprache:	eng
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:	The utility model discloses a piston type pressure-releasing and pressure-keeping valve, which is composed of a main valve, a constant pressure guide valve and a connecting pipe, wherein, a valve clack of the main valve is positioned on an outlet of a valve seat and is interlocked with a control mechanism through a valve rod. The utility model is characterized in that the control mechanism is composed of a piston cylinder and a piston, causing that the utility model can quickly eliminate abnormal pressure and can have the advantage of long service life. A filter screen is arranged in a valve body on the inlet side of the valve seat of the main valve without needing an outer filter; the utility model is especially suitable for protect systems and devices safety on a liquid transmission pipeline.