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Electric and Diesel Fire Pump Set with Backup Power for Enhanced System Resilience

The electric-diesel fire pump assembly integrates a main electric pump, a diesel backup pump, a jockey pump, and automatic control equipment. Supporting various flow rate and pressure configurations, it provides backup power assurance, maintains pipeline network pressure, and offers a reliable fire-fighting water supply solution suitable for industrial plants, warehouses, petrochemical facilities, and large-scale buildings.

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The electric-diesel fire pump set is an integrated fire water supply system combining an electric main pump, a diesel backup pump, and a jockey pump; it is specifically designed for building and industrial fire protection projects requiring stable water supply and backup power reliability. The system integrates the fire pumps, drive units, control cabinets, pressure monitoring instruments, valves, and interconnecting piping onto a unified skid-mounted base. This compact structure simplifies on-site installation, optimizes pump room layout, and facilitates equipment maintenance. The electric main pump typically handles the primary water supply duties, offering ease of operation, high power transmission efficiency, and convenient electrical control. The diesel backup pump, driven independently by a diesel engine, provides a reliable backup water supply when electric power is unavailable—thereby mitigating the impact of a single power source failure on the fire protection system. This dual-power configuration (electric and diesel) allows the pumps to complement each other based on project power supply conditions and fire safety design requirements, delivering a more resilient fire water supply solution for critical facilities. The jockey pump compensates for normal pressure losses in the piping network and restores pressure when it drops to a set value, helping to maintain system pressure and preventing the main pump from starting frequently due to minor pressure fluctuations. The associated control cabinet manages pump start/stop operations, indicates running status, and provides electrical protection; combined with pressure gauges and monitoring components, it allows operators to easily check network pressure and equipment status. Specific logic for main pump startup, diesel pump engagement, and pump switching is determined by fire safety design codes, control system configuration, and project-specific requirements. The system supports the selection of various fire pump types—such as end-suction pumps, horizontal split-case (double-suction) pumps, vertical in-line pumps, and multistage pumps—matched to rated flow, head, piping resistance, and installation conditions. Some integrated systems offer flow rates ranging from approximately 30 to 9,000 GPM and pressure ratings of 3 to 20 bar, with specific performance determined by the pump model, drive power, and engineering selection. The diesel engine drive unit can be configured with cooling systems and fuel supply assemblies to meet operational requirements under specified conditions; the centralized layout of suction and discharge piping and valves minimizes on-site installation work while providing adequate space for routine inspection and maintenance. These dual-power fire pump sets are suitable for industrial plants, logistics centers, petrochemical facilities, terminals, power plants, and other locations requiring high continuity in fire water supply. Selection should comprehensively account for factors such as rated flow, head, system operating pressure, power supply reliability for the electric pump, diesel engine power, fuel reserves, cooling method, starting power source, operating duration, and applicable certifications to ensure compatibility among the main pump, standby pump, jockey pump, and control system. Through a dual-power (electric and diesel) configuration, integrated structure, and flexible performance specifications, the equipment provides a stable, reliable, and easily manageable emergency water supply solution for fire protection projects of various scales.

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