SSBJ- Wet Alarm Check Valve
The SSBJ-300 Series Wet Alarm Check Valve (manufactured by Ningjin APC Industries) is a specialized waterflow control valve designed for wet pipe automatic fire sprinkler networks. It prevents the reverse flow of water (backflow) from the system piping into the water supply and is engineered to automatically trigger a mechanical or electrical alarm during sustained sprinkler head discharge
Description
⚙️ Core Technical Specifications
| Parameter | Specification Details |
|---|---|
| Model Configurations | • Groove x Groove (GG) • Flange x Flange (FF) • Flange x Groove (FGA / FGB) |
| Size Range | Available from 2″ to 12″ (DN50 to DN300) |
| Working Pressure | Rated up to 300 PSI (20.7 bar) maximum |
| Temperature Range | 4°C to 70°C (39.2°F to 158°F) (Protect from freezing) |
| Body Coating | High-durability fusion-bonded epoxy coating (internal and external) for superior corrosion protection |
🌐 Connection Standards
-
- Flange Specifications: Complies with ASME/ANSI B16.1 Class 125, ASME/ANSI B16.42 Class 150, BS EN1092-2 PN16, and GB/T9113.1.
- Groove Specifications: Complies with AWWA C606 and ISO 6182-12.
🧱 Main Trim Components & System Integration
A complete operational valve group includes the primary check valve integrated with a standard functional trim package:
-
- Retard Chamber: Collects surge water from brief pressure fluctuations to eliminate false alarms.
- Water Motor Gong: A purely mechanical, water-driven alarm bell that alerts occupants without relying on electrical power.
- Pressure Alarm Switch: Actuates an electrical signal to notify fire alarm control panels (FACP) or remote monitoring services.
- Trim Accessories: High-pressure gauges, Y-strainers, test bypass valves, and main drain connections.
📜 Standards & Approvals
-
- Certifications: UL Listed and FM Approved for fire protection safety systems.
- Application Limit: Designed strictly for wet pipe configurations in environments maintained above freezing temperatures.
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