Jiangsu Beiertek Building Technology Co., Ltd.
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hydraulic alarm bell
Product Description
Hydronic alarms are all-weather water pressure driven mechanical alarms that provide a continuous warning when the sprinkler system is in operation. The alarm is easy to install, usually on the outside wall of a building, and sounds when water flows through a wet alarm valve, dry valve, or rainshower valve to the hydronic alarm.
The hydraulic alarm's lightweight impeller design utilizes technology that produces a high-frequency, high-intensity sound. The alarm, envelope fittings and pump casing are made of a corrosion-resistant alloy and the drive shaft requires no lubrication. The alarm is tightly placed in the envelope fitting during installation, thus eliminating the need for a special sleeve or special protection.
This product is suitable for all types of sprinkler systems.
Action Description: When the sprinkler system is activated, water flows from the wet alarm valve, dry valve or rain valve through the DN20 alarm pipe into the pump casing and through the 3mm nozzle inside, generating a high speed jet that impinges on the waterwheel and rotates the waterwheel, the drive shaft and the alarm crank fitting. When the alarm crank fitting rotates, it hits the bell body to produce a continuous alarm sound. The water is discharged from the pump body via a DN25 drain. As long as water continues to flow through the sprinkler system, the hydraulic alarm will continue to sound. The alarm can be silenced by closing the alarm control valve installed on the wet alarm valve, dry valve or rain shower valve piping. Hydronic alarms can be automatically reactivated after operation. If the alarm stops sounding by closing the alarm control valve during operation, reset the alarm control valve when the sprinkler system is set again.
Alarm valves, dry valves, and rainshower valves to the hydronic siren should use pipe ≥ 20mm in diameter and should not exceed 23m (75ft) in total length to minimize water pressure loss. The height of the hydraulic alarm above the valve should not exceed 6.1m (20ft).
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Building A, Rongchuang Research Center, No. 99 Lize Road, Jiangning District, Nanjing City, Jiangsu Province, China
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