Alarm Check Valve Hd Fire

Description 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 hd fire. Sdh ava technical data. It serves a dual purpose which prevents a reverse flow of water non return also provides for the use of the water motor gong. It serves a dual purpose which prevents a reverse flow of water non return also provides for the use of the water motor gong. The bypass check valve reduces the possibility of false alarms by permitting slow as well as small transient increases in water supply pressure to be passed through.

External bypass prevents false alarm under all supply pressure condition. An alarm check valve can be activated or opened in one of two basic ways. In this video we will take about alarm which specially for alarm check valve that alarm will operate when system is running. If pressure alarm switch gives a steady signal but sprinkler alarm generates an intermittent alarm check sprinkler alarm bell shaft.

When a flow of water from the system equals or exceeds that of a single sprinkler the valve is to actuate a fire alarm. 3 4 6 8 model h series alarm check valve installation and maintenance guide 4077 airpark drive standish michigan 48658 phone 989 846 4583 800 248 0278. June 2020 page 3 of 16 hd 247 hd fire protect pvt. Either manually when a person activates a water gong or electronically.

If both the sprinkler alarm bell and pressure alarm switch are generating intermittent alarm then check for the possible air which is trapped within. Hd alarm valves act as a check valves by trapping pressurized water above the clapper and preventing reverse flow from sprinkler piping. The wet alarm valve is designed for applications where the water is unlikely to freeze. 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 alarm check valve is a water flow alarm device designed for vertical installation in the main supply to a wet pipe sprinkler system. 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. Hd fire protect 2 178 views. It for fire suppression systems.