Production introduction
An Alarm Check Valve (ACV) is a critical component in fire protection systems, playing a vital role in safeguarding buildings, facilities, and lives from the devastating effects of fire. It
The Alarm Check Valve is a specialized valve designed primarily for use in automatic sprinkler fire protection systems. It is installed between the water supply and the sprinkler piping, controlling water flow into the system and ensuring that water is available when needed while preventing backflow into the supply line. Its key feature is the integrated alarm mechanism that signals when water begins to flow through the valve, typically during the activation of sprinkler heads in response to heat or smoke.
Under normal conditions, the Alarm Check Valve remains closed, preventing water from entering the sprinkler piping system. When a fire occurs, and one or more sprinkler heads activate due to heat, water pressure downstream of the valve decreases. This pressure drop causes the valve clapper or disc to lift, allowing water to flow into the sprinkler piping and out of the open sprinkler heads to suppress the fire.
Simultaneously, as the valve opens, the integrated alarm device is triggered. This activation might involve a mechanical water motor gong or an electronic pressure switch, which then sends an alert to building occupants or monitoring services, indicating the system has responded to a potential fire. This prompt notification allows rapid response and evacuation if needed, enhancing safety and minimizing damage.
Product specification
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Specification |
ZSFZ-Sprinkler System Alarm Check Valve |
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3" |
4" |
5" |
6" |
8" |
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Rated Operation Pressure |
1.6Mpa |
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Application Medium |
Water ,Foam mixture |
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Connection Type |
Flange End |
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Body Material |
Ductile Iron |
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Installation |
Vertical |
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Flange Standard |
BS4504 |
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FAQ
Q: What is the primary function of a sprinkler system alarm check valve?
A: It ensures unidirectional water flow and activates alarms during system discharge, preventing backflow and contamination.
Q: What materials are commonly used in its construction?
A: Valve bodies are typically ductile iron or stainless steel; internal components like discs use bronze or EPDM rubber for durability and corrosion resistance.
Q: What nominal diameters are available?
A: Common sizes range from 80 mm to 250 mm, accommodating diverse piping systems.
Q: How does the valve prevent false alarms?
A: A retard chamber delays water flow to the alarm circuit, filtering out transient pressure surges (e.g., from water hammer).
Q: How does a water motor gong operate?
A: Water flow drives a turbine connected to a bell, producing an audible alarm without external power.