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. Function and role
Water flow control: control the water flow in the fire fighting 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, trigger the 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:
Provides the function of manually switching the valve for maintenance and emergency operation.

3. Principle of operation
Normal state:
The valve is in the open state, the water flow is smooth, and the alarm device is not triggered.

Abnormal state:
When the valve is closed (such as human operation or failure), the micro switch detects the state change and triggers the alarm signal.

Alarm signal:
The signal is transmitted to the fire control center through the wire to remind the relevant personnel to deal with it.

4. Application Scenarios
Fire fighting water supply system:
Installed in the fire pump outlet, water tank outlet or pipeline key position 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 protection systems.

5. Selection points
Caliber: according to the size of the pipeline to choose the appropriate valve caliber (such as DN50, DN100).

Pressure level: select the valve suitable for the system working pressure (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 ordinary fire control system.

Analog 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:
Ensure that the direction of the valve arrow is consistent with the direction of water flow.

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 to operate: Manual operation mechanism facilitates maintenance and emergency operation.

Real-time monitoring: Alarm function provides real-time status feedback to improve system safety.

8. Common Brands
Domestic brands:
Such as Shanghai Liangong, Zhejiang Shion, Jiangsu Shentong.

International brands:
Such as Tyco (Tyco), Honeywell (Honeywell), Victaulic (Victor).

Summarize
Fire alarm butterfly valve is an indispensable equipment in the fire protection system to ensure the reliability and safety of the fire protection system by controlling the water flow and monitoring the valve status. When selecting, installing and maintaining, you need to choose the right model and brand according to the specific needs.

If there are more questions, please feel free to inquire!

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