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Home > Products > Valve > Pre-Action Alarm Valve

Pre-Action Alarm Valve

Size Range: 3"-8" (DN80-DN200)

Design Standards: UL 193, FM 1041, GB 5135.2, VDS 2100

Connection Standards: ISO 6182, AWWA C606

Working Pressure: PN16/PN10, 300PSI, 250PSI, 200PSI

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Product description

A wet alarm valve is a one-way valve designed to allow water flow into a wet fire suppression system and activate connected alarm components at specified pressure and flow rates. Together with other components such as pressure switches, water flow indicators, and sprinkler heads, it forms a wet automatic sprinkler system, widely used in fire-prone facilities such as warehouses, hotels, shopping malls, hospitals, theaters and office buildings. It is particularly suitable for high-rise buildings and underground engineering projects.

Customer challenge

Lack of Certifications

Most products lack authoritative certifications such as FM/UL/DS/3C.

Pressure Fluctuations

Standard valves frequently trigger false alarms due to(pipe network) pressure surges.

Flow Restrictions

Market-dominant (reduced-bore) designs increase flow resistance.

Product function

Precise control to prevent backflow

Fire Alarm

The alarm valve only allows water flow in one direction into the sprinkler system and alarms at the specified flow rate, facilitating the connection or disconnection of the alarm water flow and preventing water backflow.

When a fire occurs, the wet alarm valve receives the water flow signal, and the alarm water flow activates the hydraulic bell and pressure switch to trigger the alarm.

Value advantage

Self-Testing Function

The integrated test system allows for operational verification without actual fire conditions by opening the manual ball valve to check if the valve maintains proper standby status.
False Alarm Prevention

The compensating structure within the valve clapper prevents false alarms caused by pipeline seepage or water supply pressure fluctuations.
Low Flow Resistance & Energy Efficiency

Full-flow passage design minimizes hydraulic resistance loss, ensuring energy-saving operation.
Extended Service Life

Corrosion-resistant copper alloy and stainless steel internal components guarantee long-term durability.
Comprehensive Certifications

The product holds all major fire protection certifications including FM/UL/VDS (US/EU) and China's 3C certification.

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