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Specifications for the Installation of Valves in Fire Pump Rooms
The technical specifications for fire water supply and fire hydrant systems clearly stipulate that a visible-rodded gate valve or a butterfly valve with an automatic locking mechanism should be installed on the suction pipe of the fire pump. However, when a concealed-rodded valve is used, it must be equipped with opening markings and indicators. If the pipe diameter exceeds DN300, it is recommended to install an electric valve. Although specific distance requirements are not directly specified for the installation location of these valves, it is emphasized that they must be easy to operate and maintain. Based on practical engineering experience, in order to facilitate the operation of the valves and ensure safety during use, there should be at least 0.8 to 1.2 meters of space between the valves and any surrounding obstacles or walls, allowing personnel to move freely and operate the equipment without obstruction.
The specifications also mention that when a swirl preventer is used at the suction inlet of the fire pump, the submersion depth should not be less than 200 mm. Although this does not directly address the installation distance of valves, the suction inlet and the valves are closely related components of the system. From the perspective of the overall system’s operation, the installation location of the valves must ensure that their operation does not affect the submersion depth of the suction inlet. Therefore, there should be a certain distance between the valves and the suction inlet in the horizontal direction; it is generally recommended that this distance be no less than 0.5 meters, in order to prevent disturbances in the water flow caused by valve operation from affecting the suction efficiency.
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