Alarm Check Valve Bell

Close the alarm test valve and verify that water has ceased to flow from the alarm line drain.

Alarm check valve bell. Wet system valves water motor alarm model av 1 300 alarm check valve 300 psi 20 7 bar 2 1 2 to 8 dn65 to dn200 vertical or horizontal installation model rc 1 retard chamber for variable pressure wet pipe sprinkler systems 300 psi 20 7 bar model wma 1 water motor alarm hydraulically operated mechanical sprinkler alarm. Clean the strainer of restriction. Straight risers use a standard check valve instead of an alarm valve in these system risers fire alarm bells activate electronically after a physical trigger switches installed along the system riser may use a paddle which moves as water flows or electronic components designed to detect changes in pressure. Verify that the sprinkler alarm bell and or the pressure alarm switch electric alarm properly actuate.

Either manually when a person activates a water gong or electronically. 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. Waterway clapper in the alarm check valve. Open the alarm test valve.

Meanwhile in the event of variable pressure condition false alarm is prevented with provision of retard chamber at the external bypass. How to silence fire sprinkler system alarm bell silence. The water staying pressurized in the pipes is released over the fire area after the sprinkler is activated. Viking wet pipe alarm check valve system system reset procedure duration.

Any alarm check valve should be carefully tested examined and cleaned periodically in accordance with nfpa 25. Once the pressures stabilize the alarm check valve is in service and the centrally located groove in the seat ring is sealed. Alarm check valve is core element in wet pipe fire sprinkler systems. It serves a dual purpose which prevents a reverse flow of water non return also provides for the use of the water motor gong.

An alarm check valve can be activated or opened in one of two basic ways. Spil team2 2 903 views. Water bell duration. If during the annual inspection of alarm check valves sediment or free particles of matter are noted a further.

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. Clean the 20 nb 3 4 strainer provided on the sprinkler alarm bell line. Hd alarm valves act as a check valves by trapping pressurized water above the clapper and preventing reverse flow from sprinkler piping.