Overpressure protection device

The utility model discloses an overpressure protection device, comprising a first power supply, a relay, an electromagnetic drain valve and a pressure switch which is arranged on a secondary water return pipe, wherein the first power supply, the relay and pressure switch form the main circuit loop;...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	YU BAOFA, LIU GANG, ZHAO WENBIN, DONG HUANGSHENG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BLASTING DOMESTIC HOT-WATER SUPPLY SYSTEMS DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATINGSYSTEMS ELEMENTS OR COMPONENTS THEREFOR HEATING LIGHTING MECHANICAL ENGINEERING RANGES VENTILATING WEAPONS
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Beschreibung
Zusammenfassung:	The utility model discloses an overpressure protection device, comprising a first power supply, a relay, an electromagnetic drain valve and a pressure switch which is arranged on a secondary water return pipe, wherein the first power supply, the relay and pressure switch form the main circuit loop; one of the pair of normally open contacts of the relay is connected with one end of the electromagnetic drain valve and the other one is in series connection with the second power supply and connected to the other end of the electromagnetic drain valve. The overpressure protection device disclosed by the utility model has high sensitivity and is convenient to use, and the pressure value of draining water is set; not only the secondary screen is protected effectively and the labor intensity of the maintenance staff is reduced.