Alarm Check Valve Purpose

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 purpose. The main purpose of the alarm check valve is to ring a mechanical bell called a water motor gong. Viking sprinkler 64 418 views. 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. Viking wet pipe alarm check valve system system reset procedure duration.

An alarm check valve is basically a check valve with an alarm port. Alarm check valve is core element in wet pipe fire sprinkler systems. When backflow occurs it closes itself. 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.

Above and below each alarm check valve or system riser check when present nfpa 2002 7 1 1 2 and adjacent to main drain nfpa 13 2002 8 16 3 1 2007 16 8 17 3 1 2019 16 13 1. In the event of variable pressure condition false alarm. 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. 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.

It is most important to ensure a clean water supply free of debris and solid particles such as sand gravel or mud. External bypass prevents false alarm under all supply pressure condition. Above picture shows a swing ch. An alarm check valve can be activated or opened in one of two basic ways.

Globe alarm check valve installation and maintenance guide important notes 1. Under normal circumstances the clapper of the valve is. Duyar vana yangın sistemleri animasyonu duration. Any alarm check valve should be carefully tested examined and cleaned periodically in accordance with nfpa 25.

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. Check valve allows flow only in one direction i e. To assess loss of pressure over time during testing and to verify the water pressure in a system.

Either manually when a person activates a water gong or electronically.