Use Of Alarm Check Valve

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.

Use of alarm check valve. A check valve with a high cv in a low flow application is doomed from the start. An alarm check valve consists of a spring valve clapper and alarm port. The main purpose of the alarm check valve is to ring a mechanical bell called a water motor gong. The wet alarm valve is designed for applications where the water is unlikely to freeze.

They mainly serve a dual purpose in that they restrict reverse flow of water through their bodies. It serves a dual purpose which prevents a reverse flow of water non return also provides for the use of the water motor gong. There are various types of check valves used in a wide variety of. 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.

In the event of variable pressure condition false alarm. Either manually when a person activates a water gong or electronically. An alarm check valve is basically a check valve with an alarm port. An alarm check valve is basically a check valve with an alarm port.

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. The water staying pressurized in the pipes is released over the fire area after the sprinkler is activated. 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.

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. If the bell alarm is electrical or connected to a fire alarm system per nfpa 72 and not mechanical i would approve a check valve. 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. External bypass prevents false alarm under all supply pressure condition.

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. Alarm check valve is core element in wet pipe fire sprinkler systems. An alarm check valve can be activated or opened in one of two basic ways. They also provide for the use of a hydraulic fire alarm which is not reliant on an electrical power supply for its operation.