CA-FIRE QT450 Ductile Iron Wet Alarm Valve
The QT450 Ductile Iron Wet Alarm Valve is a core control component for automatic sprinkler fire suppression systems, constructed with QT450 ductile iron (main body) for high impact resistance and corrosion durability. Designed for wet sprinkler systems (permanently filled with water), it triggers automatically when a sprinkler head ruptures (due to pressure drop), activating the alarm bell and initiating water spray. This valve is suitable for commercial complexes, hospitals, industrial warehouses, and high-rise buildings, complying with GB 5135.2-2003 Automatic Sprinkler Fire Suppression System Components - Part 2: Wet Alarm Valves and featuring a 1.6MPa rated working pressure for stable operation.
Description
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Products Description
CA-FIRE QT450 Ductile Iron Wet Alarm Valve
The QT450 Ductile Iron Wet Alarm Valve is a core control component for automatic sprinkler fire suppression systems, constructed with QT450 ductile iron (main body) for high impact resistance and corrosion durability. Designed for wet sprinkler systems (permanently filled with water), it triggers automatically when a sprinkler head ruptures (due to pressure drop), activating the alarm bell and initiating water spray. This valve is suitable for commercial complexes, hospitals, industrial warehouses, and high-rise buildings, complying with GB 5135.2-2003 Automatic Sprinkler Fire Suppression System Components - Part 2: Wet Alarm Valves and featuring a 1.6MPa rated working pressure for stable operation.
Products Features
CA-FIRE Wet Alarm Valve
Cast from QT450-10 ductile iron (tensile strength ≥450MPa, elongation ≥10%), the valve resists impact damage during system maintenance and has better corrosion resistance than gray cast iron. Its surface is treated with epoxy zinc-rich primer + polyurethane topcoat, achieving salt spray resistance ≥800h for indoor/outdoor installation.
Dual-Pressure Gauge Monitoring
Equipped with inlet/outlet pressure gauges to real-time track system pressure differences-enabling early detection of minor leaks or pressure anomalies before sprinkler activation.
The attached delay chamber (red cylindrical component) prevents false alarms caused by transient pressure fluctuations (e.g., system pressure adjustments), ensuring the alarm bell only triggers when a sprinkler head ruptures.
Installation & Maintenance of CA-FIRE Wet Alarm Valve
1 Installation Key Points
Match the valve model to the sprinkler system's pipe diameter (e.g., DN100 valve for DN100 pipelines);
Connect via flanges (use asbestos-free rubber gaskets) and tighten bolts diagonally to ensure sealing;
After installation, conduct a 1.2× rated pressure test (1.92MPa) for 30min to confirm no leaks.
2 Maintenance Schedule
Monthly Check: Verify inlet/outlet pressure gauge readings (pressure difference should be ≤0.05MPa in standby state);
Quarterly Inspection: Drain the delay chamber to clear sediment and test the alarm bell activation (via manual pressure release);
Annual Calibration: Disassemble the valve disc to inspect rubber seal integrity, and re-test pressure resistance;
Long-Term Standby: For systems unused for >6 months, flush the valve with clean water to prevent internal rust buildup.
FAQ– CA-FIRE Wet Alarm Valve
Q1: What are CA-FIRE products used for?
A1: They provide reliable fire protection for commercial, industrial, and warehouse environments.
Q2: Are the products durable?
A2: Yes, all are made from high-quality, corrosion-resistant materials for long-term performance.
Q3: Can they integrate with alarm systems?
A3: Yes, most products support hydraulic, electric, or mechanical alarms for immediate notification.
Our address
NO.8, YUANFENG ROAD, MEIYUAN VILLAGE, KANGMEI TOWN, NANAN CITY, QUANZHOU CITY, FUJIAN CHINA
+86 15880910562
sales7@ca-fire.com
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