Coliter ® Brass Gas Automatic Shut-off Valve, 2kPa, -20–60°C, BSP Threaded
AQ3108 Brass Gas Automatic Shut-off Valve – Fail-Safe Emergency Cut-Off for Natural Gas and LPG Systems
The Coliter® AQ3108 Brass Gas Automatic Shut-off Valve is a fail-safe safety valve engineered to instantly cut off the flow of natural gas or liquefied petroleum gas (LPG) upon detection of hazardous conditions—such as gas leakage, abnormal pressure, or power failure—when integrated with a compatible gas alarm system. Constructed from high-quality forged brass, it ensures durability, corrosion resistance, and long-term reliability in residential, commercial, and utility installations. Rated for a nominal pressure of 2 kPa and operating temperatures from -20°C to 60°C, it complies with Chinese gas safety standards. The valve features ISO 228 (BSP parallel) pipe threads—standard size DN15 (G1/2")—and supports both 24V and 220V actuation options. In an emergency, its spring-return mechanism closes the valve within seconds, providing critical protection against fire, explosion, or poisoning risks.
Installation diagram
Product Description
| DN | G | B | L | H |
| 15 | G1/2" | 11.5 | 130.5 | 55 |
Technical Specifications
Nominal Pressure: 2KPa
Working Medium: Natural Gas
Working Temperature: -20℃ ≤ t ≤ 60℃
Pipe Threads: ISO 228
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Faq - Frequent questions
Introduction to Automatic Shut-off Valve For Pipeline Gas
Coliter® offers certified automatic shut-off valves for pipeline gas, engineered to instantly cut off natural gas or LPG flow upon detecting abnormal pressure, leakage, or power failure—ensuring safety in residential, commercial, and industrial installations. Available in brass (AQ3108/AQ3008) and lightweight aluminum alloy (AQ3109/AQ3009) bodies, these valves feature fail-safe spring-return mechanisms, 24V/220V actuation options, and compliance with Chinese gas safety standards. Designed for integration with gas alarm systems, they respond within seconds to potential hazards. Ideal for kitchens, boiler rooms, and gas meter stations—backed by rigorous testing and OEM-ready for global safety solutions.
