Fire Alarm Butterfly Valve

Fire Alarm Butterfly Valve (Fire Alarm Butterfly Valve) is a kind of key equipment used in fire protection system, which is mainly used to control the water flow and monitor the valve status. The following is a detailed introduction of Fire Alarm Butterfly Valve:

1. Functions and roles
· Water flow control: control the water flow in the fire protection system through the opening and closing of the butterfly valve.
· Status monitoring: Equipped with an alarm device to monitor the valve status (open or closed) in real time.
· Alarm function: When the valve is closed accidentally, it triggers an alarm signal to ensure the normal operation of the fire protection system.

2. Main components
· Butterfly valve body: composed of valve body, valve plate and sealing ring, used to control water flow.
· Alarm device: including microswitch, signal module, etc., used to monitor the valve status and send signals.
· Manual operation mechanism: Provide the function of manually switching the valve, which is convenient for maintenance and emergency operation.

3. Working principle
· Normal state: the valve is open, the water flow is smooth, the alarm device is not triggered.
· Abnormal state: When the valve is closed (such as human operation or fault), the micro switch detects the state change and triggers the alarm signal.
· Alarm signal: the signal is transmitted to the fire control centre through wires to remind the relevant personnel to deal with it.

4. Application Scenario
· Firefighting water supply system: Installed at the exit of firefighting water pump, water tank exit or key position of pipeline to ensure smooth water supply.
· Automatic sprinkler system: used to control the water flow of the sprinkler network and monitor the valve status.
· Industrial fire-fighting system: applicable to chemical plants, warehouses and other places that require highly reliable fire-fighting systems.

5. Selection points
· Calibre: select the appropriate valve calibre according to the pipe size (such as DN50, DN100).
· Pressure level: select the valve suitable for the working pressure of the system (such as PN16, PN25).
· Material:
Valve body: cast iron, ductile iron, stainless steel.
Seal ring: EPDM, NBR (high temperature and corrosion resistance).
· Alarm signal type:
Dry contact signal: applicable to general fire control system.
Analogue signal: applicable to intelligent fire control system.

6. Installation and Maintenance
· Installation Location: Install in a location that is easy to operate and monitor, avoid humid and corrosive environment.
· Installation direction: Make sure the arrow direction of the valve is the same as the water flow direction.
· Periodic inspection:
Check whether the valve opens and closes flexibly.
Test whether the alarm function is normal.
Clean the valve body and seals to prevent clogging or damage.

7. Advantages
· High reliability: Ensure the normal operation of the fire protection system and avoid interruption of water supply due to valve closure.
· Easy operation: manual operation mechanism facilitates maintenance and emergency operation.
· Real-time monitoring: alarm function provides real-time status feedback to improve system safety.