Multi-Pump Fire Pump Set – Coordinated Pumps for Fire Water Supply and Pressure Maintenance
A multi-pump fire-fighting unit integrates electric fire pumps, diesel-engine fire pumps, and jockey (pressure-maintenance) pumps. By coordinating the operation of pumps with distinct functions, the system provides fire-fighting water supply and maintains pressure within the piping network. It supports a variety of pump types and parameter configurations, making it suitable for fire protection systems in industrial facilities and large-scale buildings.
The multi-pump combination fire pump unit is a complete set of fire water supply equipment that is systematically configured with a main fire pump, a backup diesel fire pump and a pressure stabilizing pump. It is suitable for industrial plants, warehousing logistics, docks, airports, petrochemical facilities, power facilities, ships and large buildings that require fire water supply reliability, pressure stability and continuous operation capabilities of the equipment. According to the actual product configuration, this type of fire pump unit usually uses an electric fire pump as the working pump, a diesel engine-driven fire pump as a backup pump, and is equipped with a small flow and high-lift pressure regulator pump. The three types of equipment bear different water supply functions and cooperate with each other to form a more complete fire water supply unit. Official website information shows that the flow range of the relevant fire pump units can reach 30–9000 GPM, and the head range is 3–20 bar. The power of the electric pump and diesel pump can be configured according to the specific model, and the power range of the pressure stabilizing pump can cover 0.55–160 kW. The actual parameters should be based on the project design and specific model. Electric fire pumps are mainly responsible for normal fire water supply tasks. End-suction pumps, single-stage pumps, horizontal split pumps, multi-stage pumps and other structures can be selected according to project conditions. They have good selection flexibility when the flow rate, lift, installation space and pipeline conditions are different. Diesel fire pumps serve as backup power equipment and form a combination of different power sources with electric pumps. In projects where the fire protection system requires backup water supply capacity, the corresponding diesel engine and fire pump can be configured according to the design parameters. Diesel engine pumps are usually equipped with fuel tanks, water tanks, fans and control components, so that power equipment and pumping equipment form a complete operating unit. The pressure stabilizing pump is mainly responsible for the daily pressure maintenance of the fire protection pipe network. Its flow rate is usually smaller than that of the main fire pump, but its head is relatively higher. When there is a small flow of water in the fire protection pipe network or the pressure naturally drops, the pressure-stabilizing pump can replenish water according to the set pressure to maintain the pipe network within the corresponding pressure range, thereby reducing the frequent start-up of the main fire pump due to slight pressure changes. According to the system configuration requirements, the pressure-stabilizing pump can adopt a horizontal or vertical structure, and the appropriate flow rate and head are determined according to the fire pipe network pressure. The advantage of a multi-pump combination is that different equipment undertakes different operating tasks. It does not simply install multiple pumps together, but forms a more complete fire water supply system through the functional division of work pumps, backup pumps and pressure stabilizing pumps. Under normal conditions, the voltage stabilizing equipment is responsible for maintaining the pressure of the pipe network; when fire water demand occurs, the main fire pump that meets the design requirements provides the main water supply capacity; the backup diesel pump serves as another form of power for fire water supply equipment and is put into operation according to the system control logic and project requirements. This configuration can make the equipment functions more clear and facilitate the parameter selection of working pumps, backup pumps and voltage stabilizing equipment according to the engineering fire protection design. In terms of structure, the complete fire pump set can centrally configure the pump body, diesel engine, control cabinet, pressure tank, valve, pressure gauge, pressure sensor, common suction and discharge pipelines, flexible joints, flanges and public base, etc., reducing the connection work between scattered equipment on site and facilitating equipment transportation, installation and maintenance. The control system can control electric fire pumps, diesel fire pumps and voltage stabilizing pumps according to configuration, and can set overload, overcurrent and other protection functions so that different equipment can be managed according to corresponding operating requirements. In terms of pump type selection, this type of fire pump unit can adopt structures such as end-suction pumps, horizontal split-case pumps, vertical split-case pumps, vertical pipeline pumps or vertical turbine pumps according to engineering conditions. Therefore, it can be configured according to different water source conditions, building height, pump room space and fire protection pipe network requirements. For large-scale industrial projects, different flow, head, and power combinations can also be selected based on actual water supply needs to better match the entire set of equipment with the design parameters of the fire protection system. After the product adopts a complete set design, the main pump, backup pump and pressure stabilizing pump can be centrally arranged according to project requirements, and combined with the common base and common pipelines to form a more complete equipment unit. For engineering installation, this structure is conducive to unified equipment positioning, pipeline connection and control system debugging. It also facilitates later inspection of the operating status of each pump unit and ancillary components. It should be noted that the actual performance of a multi-pump fire pump unit cannot be judged solely based on the rated parameters of a single pump. Instead, factors such as fire design flow, system pressure, pipeline resistance, water source conditions, backup requirements, and stabilized pressure should be comprehensively considered for selection. Only by reasonably determining the parameter relationship between the main pump, diesel backup pump and voltage stabilizing pump can each equipment play a corresponding role in the fire protection system. Overall, the multi-pump fire pump set has the characteristics of clear functional division, diverse power forms, stable pressure maintenance, flexible pump type selection, and high complete set configuration. It can be designed according to the fire water supply needs of different projects. It is a common form of complete equipment configuration in industrial facilities, large buildings and other fixed fire water supply systems.
