Dry Alarm Valve (Control Signal Valve)

The Dry Alarm Valve is a key control component used in dry-type automatic sprinkler fire protection systems, ensuring the entry of water into the pipe network during a fire. In these systems, the sprinkler pipe lines are maintained under pressure with compressed air or nitrogen during normal operation. When the sprinkler head opens due to heat during a fire, the air pressure in the system decreases, causing the pressure difference to open the valve. As a result, water enters the pipe network to facilitate the fire extinguishing process.

Dry Alarm Valves are available in a nominal diameter range of DN50–DN200 and are used in various sizes of fire protection systems. The valve body is made of spheroidal cast iron material, which has high mechanical strength and pressure resistance. Internal mechanisms and sealing elements are designed for reliable operation and long-term use.

The products are certified with UL and FM certifications, confirming compliance with relevant fire safety requirements. Depending on the system configuration, the valve is equipped with air pressure control devices, pressure gauges, an accelerator, low-pressure signal switches, and other accessories.

Dry Alarm Valves are used in warehouses at risk of freezing, loading ramps, industrial facilities, refrigerated warehouses, and other areas where the application of wet-type sprinkler systems is not possible.