Product Overview
The Skid-Mounted Fire Pump Unit is a complete, factory-integrated fire water supply package designed for rapid deployment in building fire protection systems. It combines an electric fire pump, diesel fire pump, jockey (pressure maintenance) pump, hydropneumatic pressure tank, intelligent fire control system, valves, piping, and instrumentation on a single structural baseplate — delivering a turnkey solution that eliminates the complexity of field-sourcing and assembling individual components.
Each unit is configured to meet project-specific flow, head, and system pressure requirements, ensuring reliable fire water delivery under all operating conditions.
Key Technical Parameters
| Parameter | Value |
|---|---|
| Flow Rate | 10 – 350 L/s |
| Head | 30 – 240 m |
| Motor Power | 7.5 – 1000 kW |
System Composition
The complete skid-mounted fire pump unit consists of the following core components:
- Electric Fire Pump: Primary fire water supply pump, driven by the building electrical system
- Diesel Fire Pump: Independent backup pump powered by an onboard diesel engine, activated automatically when the electric pump cannot operate due to power failure
- Jockey (Pressure Maintenance) Pump: Small-capability pump that maintains normal fire network pressure during standby conditions
- Hydropneumatic Pressure Tank: Stabilizes system pressure and prevents frequent pump cycling during minor pressure fluctuations
- Fire Control System: Intelligent controller providing automatic monitoring, start/stop sequencing, and operational status display
- Valves, Piping & Instrumentation: Complete hydraulic assembly with isolation valves, pressure gauges, and monitoring instruments
Operating Principle
Under normal conditions, the fire network is pressurized and maintained by the jockey pump at a preset range. When a fire event occurs and fire hydrants or sprinklers are activated, system pressure drops. The control system detects this drop and automatically starts the electric fire pump to deliver the required flow and pressure.
If a power failure prevents the electric pump from starting or running, the diesel fire pump automatically engages as an independent power source, ensuring continuous fire water supply to the network regardless of building power status. This dual-power architecture is a critical safety feature mandated by fire protection codes worldwide.
Key Features & Benefits
Rational Piping Layout
The integrated piping design is clean, structured, and logically arranged — simplifying operation, inspection, and routine maintenance. All connections are accessible without disassembling other components.
Modular Factory Delivery
The modular integrated design enables complete factory assembly and testing before shipment. On-site installation is reduced to positioning, connecting interfaces, and commissioning — significantly shortening construction timelines compared to field-built systems.
Quick Field Connections
Piping interfaces and electrical connection points are clearly marked and logically organized, enabling fast connection to the building’s fire network and power supply. This reduces installation complexity and minimizes on-site errors.
High Automation Level
The intelligent control system provides automatic monitoring of all operating parameters, automatic pump start/stop sequencing, and real-time status display. This improves response speed during emergency events and enhances overall system reliability.
High System Integration
Fire pumps, pressure maintenance equipment, control systems, and all related piping accessories are centrally configured on a single baseplate. The compact, unified structure simplifies management, operation, and maintenance — everything is in one place.
Installation Guidelines
Pre-Installation Preparation
- Verify equipment model, flow rate, head rating, motor power, and control specifications against project requirements.
- Ensure the installation location provides adequate clearance for operation, maintenance access, and ventilation for the diesel engine.
- Confirm foundation load capacity, alignment with fire network connections, and electrical supply availability.
Installation Steps
- Positioning: Place the skid-mounted unit on a level, structurally sound foundation. Anchor using provided mounting points.
- Piping connections: Connect the suction and discharge interfaces to the fire network piping. Install isolation valves and instrumentation per the supplied drawings.
- Electrical connections: Wire the electric pump, diesel pump starter, and control panel according to the electrical schematic. Ensure proper grounding.
- Diesel fuel system: Connect the fuel supply line to the diesel engine. Verify fuel tank capacity meets minimum runtime requirements per fire code.
- Commissioning: Perform functional tests including automatic start sequences, pressure response, diesel pump engagement under simulated power loss, and control panel diagnostics.
Application Scenarios
Skid-mounted fire pump units are widely deployed in:
- Commercial Buildings: Office towers, shopping malls, hotels, and mixed-use developments requiring code-compliant fire water supply
- Industrial Facilities: Manufacturing plants, warehouses, chemical facilities, and power stations with high fire risk
- Residential Complexes: High-rise residential buildings requiring integrated fire protection water systems
- Public Infrastructure: Hospitals, schools, airports, and transportation hubs
- Petrochemical Sites: Oil refineries, tank farms, and processing facilities requiring high-capacity fire water delivery
Frequently Asked Questions
Q1: Why is a diesel fire pump included alongside the electric pump?
The diesel pump serves as an independent backup power source. In the event of a building power failure during a fire, the diesel engine can start and deliver fire water without relying on the electrical grid — a critical safety redundancy required by most fire protection standards.
Q2: What are the typical flow and head ranges for this unit?
The standard configuration covers flow rates from 10 to 350 L/s and heads from 30 to 240 m, with motor power ranging from 7.5 to 1000 kW. Custom configurations are available for projects outside these ranges.
Q3: How does the control system manage the different pumps?
The intelligent controller monitors fire network pressure continuously. When pressure drops below the setpoint, it starts the jockey pump first. If pressure continues to drop (indicating active fire demand), it starts the electric fire pump. If electric power is unavailable, it automatically engages the diesel fire pump.
Q4: What advantages does the skid-mounted design offer over field-assembled systems?
Factory assembly ensures consistent quality, reduces on-site labor by an estimated 40-60%, eliminates field piping fabrication errors, and enables faster project commissioning. All components arrive pre-tested and ready to connect.
Q5: How is maintenance handled on an integrated unit?
The rational piping layout and compact design ensure all components remain accessible. Routine checks (pump rotation, diesel engine health, control panel diagnostics, valve operation) can be performed without dismantling connections. The control system also provides automated diagnostic alerts.
Why Choose Chaodun Pump?
Chaodun Pump designs and manufactures skid-mounted fire pump units with full factory integration and testing — including hydrostatic pressure tests, performance curve verification, automatic start sequence validation, and diesel pump engagement testing — before shipment. Every unit arrives as a complete, ready-to-connect package. Our engineering team provides installation guidance, commissioning support, and after-sales service worldwide.
Contact us today for a technical consultation and project-specific configuration of your skid-mounted fire pump unit.