Alarm Check Valve With Gong

Wet pipe sprinkler systems will need an alarm check valve.

Alarm check valve with gong. This type of wet alarm valve is designed to automatically initiate electric or hydraulic alarm whenever there is a flow of water to one or more sprinklers. In the event of variable pressure condition false alarm. Viking wet pipe alarm check valve system system reset procedure duration. An alarm check valve is basically a check valve with an alarm port.

It serves a dual purpose which prevents a reverse flow of water non return also provides for the use of the water motor gong. Alarm valve is a double seated clapper check valve with grooved seat design which ensures positive water flow for alarm operation and is designed for installation in wet pipe sprinkler system. Alarm check valve is core element in wet pipe fire sprinkler systems. Either a water motor gong or an electric fire alarm bell may be used as part of a local waterflow alarm in any of the major fire sprinkler system types.

Hd alarm valves act as a check valves by trapping pressurized water above the clapper and preventing reverse flow from sprinkler piping. Once the alarm check valves are activated they will allow water to flow through the system engaging the sprinkler system as and where needed in order to suppress a potential fire. The main purpose of the alarm check valve is to ring a mechanical bell called a water motor gong. The valve should if properly maintained help hold the system pressure steady and reduce the possibility of false alarms.

An alarm check valve can be activated or opened in one of two basic ways. Meanwhile in the event of variable pressure condition false alarm is prevented with provision of retard chamber at the external bypass. Rapidrop model e wet alarm valves are designed for use in wet pipe sprinkler installations in buildings not subject to freezing temperatures. External bypass prevents false alarm under all supply pressure condition.

The wet alarm valve is designed for applications where the water is unlikely to freeze. While a water motor gong will work as a fire alarm bell the two devices aren t totally interchangeable. The water staying pressurized in the pipes is released over the fire area after the sprinkler is activated. Alarm valves are designed to initiate an alarm through water motor gong bell and or pressure switch during a sustained flow of water such as the flow required by an open sprinkler.

Firelock alarm check valve series 751 installation mantenance and testing manual i 751 download. Under normal circumstances the clapper of the valve is. Either manually when a person activates a water gong or electronically.