Types of Fire Valve

Common Types‌

‌Signal Valve‌: Transmits valve open/close status to fire control rooms via electrical signals or mechanical indicators. Applied at monitored locations like wet alarm valve inlets and sprinkler system main pipelines25.

‌Butterfly Valve‌: Simple structure, quick operation, compact footprint. Used in high-flow pipelines (fire pump discharge pipes, tank inlet/outlet pipes)67.

‌Gate Valve‌: Minimal flow resistance when fully open but slow operation. Suitable for fire pump suction pipes and full-bore applications4.

‌Check Valve (Non-return Valve)‌: Prevents backflow to protect equipment. Types: swing, lift, slow-close1315.

‌Pressure Reducing Valve‌: Lowers high-pressure pipeline pressure to ensure safe operation of terminal devices (e.g., sprinkler heads)1415.

‌Wet Alarm Valve‌: Core component of wet-pipe sprinkler systems, controlling flow and triggering alarms5.

‌Electromagnetic Valve‌: Electrically controlled on/off operation for gas suppression systems28.

Selection Principles‌

‌Material Requirements‌: Corrosion-resistant materials (cast iron, cast steel, stainless steel, or copper alloy) with pressure rating ≥1.6MPa46.

‌Compliance Standards‌: Mandatory CCCF certification and compliance with GB 5135 series45.

‌Functional Matching‌:
• Signal valves for monitored pipelines56;
• Check valves for backflow prevention13;
• Pressure reducing valves for high-pressure zones1415.

‌Installation Locations‌: Critical nodes (pump inlet/outlet pipes, zoned networks, tank connection pipes)56.

Maintenance Essentials‌

Periodically inspect valve operation states to ensure no corrosion/leakage610.

Verify signal feedback function for signal valves28.

Maintain flexible operating mechanisms; lubricate when necessary10.

During fire system maintenance, isolate relevant valves with tag-out warnings5.

Precautions‌

‌Normally Open/Closed Identification‌: Clearly mark valves (e.g., "NO" for main pipelines, "NC" for test drains)5.

‌Anti-misoperation Measures‌: Install locks/protective covers on critical valves5.

‌System Compatibility‌: Valve types must match firewater systems (e.g., sprinklers, hydrants)