1. Description of Fire Hydraulic Alarm Bell ZSJL

The hydraulic alarm bell is an all-weather audible alarm device driven by water power. It produces no striking sparks during operation and can be used in explosion-proof environments.

Product Standard: GB5135.2 "Automatic Sprinkler Systems - Part 2: Wet Alarm Valves, Retard Chambers, and Hydraulic Alarm Bells"

Design Code: GB50084 "Code for Design of Automatic Sprinkler Systems"

Acceptance Code: GB50261 "Code for Installation and Acceptance of Automatic Sprinkler Systems"

2. Features of Fire Hydraulic Alarm Bell ZSJL

(1) The hydraulic alarm bell consists of an aluminum alloy body, nylon impeller, nylon shaft, aluminum alloy bell housing, copper alloy bushing, and nylon liner. It requires no maintenance and has a long service life.

(2) The ZSJL wall-mounted hydraulic alarm bell integrates the water motor and the alarm bell into one unit, featuring a compact structure.

(3) The ZSJLC through-wall hydraulic alarm bell is suitable for aesthetically demanding decorations and frost-proof locations in northern regions, especially in industrial and mining protection zones. Its water motor is installed indoors in heated areas, while the alarm bell is placed outdoors.

3. Main Performance Parameters of Fire Hydraulic Alarm Bell ZSJL

(1) Activation alarm pressure of the hydraulic alarm bell: less than 0.5 MPa; rated working pressure: 1.2 MPa

(2) Flow coefficient K of the hydraulic alarm bell: 5.4

(3) Alarm sound level of the hydraulic alarm bell: greater than 70 dB at 0.5 MPa; greater than 85 dB at 0.2 MPa

(4) Interface thread: R2 3/4″