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. External bypass prevents false alarm under all supply pressure condition. In the event of variable pressure condition, false alarm is prevented with the provision of retard chamber, thus the design allows for installation under both variable and constant supply pressure condition. Operation of one or more automatic fire sprinklers causes the water to flow into the sprinkler system causing the alarm valve to open, allowing continuous flow of water into the system and transmittal of alarm, both electrical and mechanical.
SHIELD Sprinkler Alarm is a hydraulically driven mechanical bell. It does sound a continuous alarm when the sprinkler system operates. The impeller and drive shaft are energy efficient, made from light weight nonmetallic material and do not require any external lubrication. The gong, protection cover and motor housing are made of corrosion resistant aluminium alloy. Sprinkler Alarm with mounting Type-B is wall mounting type. Type-B is suitable for 50 to 250 mm thick wall and curves with 325 mm long drive shaft as standard supply. For wall thickness 250 to 450 mm or longer a special extension drive shaft can be supplied on request.
The supervisory switch is used to monitor the open position of an Outside Screw and Yoke (OS&Y) type gate valve. User-friendly mounting bracket fits newer valve yokes Fine adjustment feature for fast, easy installation. Three position switch detects tampering and valve closure . Visual switch indicators. Adjustable length trip rod. Three position switch detects tampering and valve closure . Knurled mounting bracket prevents slipping. One or two SPDT contact models Adjustable length actuator eliminates the need for cutting the shaft. Three position switch monitors vandal and valve close signals