Fire Valves
Fire valves are the control points that regulate water flow inside the fire system. They include landing valves, pressure-reducing valves (PRV), check valves, and alarm valves. Each type performs a specific role in the system, and their coordination ensures suitable pressure and flow to each floor or protection zone in the building.
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Fire valves are the control points that ensure water flows at the right pressure at each location in the system. Types: landing valves installed on each floor on the vertical riser, opened manually to connect a fire hose — available in 2.5" and 1.5" sizes in brass or coated steel. Pressure-reducing valves (PRV) reduce pressure on lower floors where it is too high for a manual user (down to ~7-10 bar). Check valves prevent water back-flow when the pump stops and need no external control. Alarm valves are used in wet sprinkler systems; they trigger an audible alarm when water flows due to a sprinkler head opening. OS&Y valves (outside screw & yoke) are used for large main valves with a visible open-position indicator. Butterfly valves are used for large pipes (150+ mm) that need quick action. Materials: brass (corrosion-resistant, for small diameters), cast iron (for larger diameters), and stainless (for harsh environments). Applications: multi-story buildings, factories, sprinkler systems, hydrant networks, and pump stations. A technical note: the need for PRVs is determined by the hydraulic design and the outlet-pressure limits of the applicable code, to avoid dangerously high pressure on lower floors. Maintenance: annual visual check, annual operational test, and PRV pressure calibration every 5 years. Specifications follow NFPA 20, NFPA 25, EN 12259, and AWWA.
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Fire valves are the control points that ensure water flows at the right pressure at each location in the system. Types: landing valves installed on each floor on the vertical riser, opened manually to connect a fire hose — available in 2.5" and 1.5" sizes in brass or coated steel. Pressure-reducing valves (PRV) reduce pressure on lower floors where it is too high for a manual user (down to ~7-10 bar). Check valves prevent water back-flow when the pump stops and need no external control. Alarm valves are used in wet sprinkler systems; they trigger an audible alarm when water flows due to a sprinkler head opening. OS&Y valves (outside screw & yoke) are used for large main valves with a visible open-position indicator. Butterfly valves are used for large pipes (150+ mm) that need quick action. Materials: brass (corrosion-resistant, for small diameters), cast iron (for larger diameters), and stainless (for harsh environments). Applications: multi-story buildings, factories, sprinkler systems, hydrant networks, and pump stations. A technical note: the need for PRVs is determined by the hydraulic design and the outlet-pressure limits of the applicable code, to avoid dangerously high pressure on lower floors. Maintenance: annual visual check, annual operational test, and PRV pressure calibration every 5 years. Specifications follow NFPA 20, NFPA 25, EN 12259, and AWWA.
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