Function Of Alarm Check Valve

The wet alarm valve is designed for applications where the water is unlikely to freeze.

Function of alarm check valve. There are various types of check valves used in a wide variety of. External bypass prevents false alarm under all supply pressure condition. The water staying pressurized in the pipes is released over the fire area after the sprinkler is activated. A swing check valve can act as an alarm check valve for a wet pipe fire sprinkler system but only when that valve can sound an alarm.

Technical data sheet en it nl pt. The main purpose of the alarm check valve is to ring a mechanical bell called a water motor gong. In this video from the know more risk series learn about the arrangement operation and alarm testing of a wet sprinkler system that uses an alarm check valve and water flow pressure switch. A check valve clack valve non return valve reflux valve retention valve or one way valve is a valve that normally allows fluid liquid or gas to flow through it in only one direction.

Documents and resources technical data sheets. An alarm check valve is basically a check valve with an alarm port. A check valve with a high cv in a low flow application is doomed from the start. In a short period of time it will fail no matter what extraneous engineering feats were used to make it tougher unfortunately the installed check valve is blamed for the failure when in reality the culprit was the application.

Meanwhile in the event of variable pressure condition false alarm is prevented with provision of retard chamber at the external bypass. The valve should if properly maintained help hold the system pressure steady and reduce the possibility of false alarms. 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. An alarm check valve can be activated or opened in one of two basic ways.

Check valves are two port valves meaning they have two openings in the body one for fluid to enter and the other for fluid to leave. The alarm port can be used to direct water to a water motor alarm or an alarm pressure switch used to alert nearby personnel to the system s activation or send a signal to a fire alarm control panel. Cancer and reproductive harm www p65warnings ca gov. 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 check valve is core element in wet pipe fire sprinkler systems. Under normal circumstances the clapper of the valve is.