Product Overview
The XBD-W series horizontal single-stage fire pump is a single-suction centrifugal pump engineered specifically for fire protection water supply systems. Unlike vertical fire pumps that prioritize compact floor space, the horizontal configuration places the pump shaft parallel to the ground, offering a more accessible layout for maintenance, inspection, and component replacement in fire pump rooms where space is available.
Developed using proven hydraulic models and years of field application data, this series delivers stable flow and consistent pressure output for building fire hydrant systems, sprinkler networks, and fire water supply boosting. Each unit is designed and tested in accordance with relevant fire pump performance requirements, ensuring reliable operation when fire protection systems demand it.
Horizontal vs. Vertical, Choosing the Right Fire Pump Layout
The primary distinction between the XBD-W (horizontal) and XBD-L (vertical) configurations lies in installation geometry and maintenance accessibility. The horizontal design provides direct line-of-sight access to the impeller, mechanical seal, and bearings without disassembling vertical piping stacks. For facilities with adequate pump room space and a maintenance team that values straightforward component inspection, the horizontal layout often reduces service time and simplifies routine checks.
Both configurations share the same hydraulic performance foundation. The difference is in how the pump fits into the building fire protection infrastructure.
Technical Parameters
| Flow Rate | 1 to 120 L/s |
| Head | 30 to 160 m |
| Motor Power | 1.5 to 200 kW |
| Rated Speed | 2,900 r/min / 2,850 r/min |
| Medium Temperature | -15 C to +80 C |
| Ambient Temperature | 40 C maximum |
| Relative Humidity | 95% maximum |
Model Designation
| XBD | Fire Pump Designation |
| 8.0 | Rated Pressure Code (x0.1 MPa) |
| 30 | Rated Flow Code (L/s) |
| G | Fire Water Supply Configuration |
| W | Horizontal Single-Stage Fire Pump |
Working Conditions
- Handles clean water or non-corrosive liquids with similar physical-chemical properties.
- Solid insoluble content in the medium must not exceed 0.1%.
- Suitable for environments with ambient temperature up to 40 C and relative humidity below 95%.
Structural Design
The unit consists of three main assemblies: the pump, the motor, and a shared baseplate. Key structural features include:
Back Pull-Out Design
The pump casing and cover are split from the rear side of the impeller. This back pull-out configuration allows the rotating assembly to be removed without disturbing the suction and discharge piping. This design simplifies maintenance and reduces downtime during seal or bearing replacement.
Axial Force Balancing
Most models include sealing rings on both the front and rear sides of the impeller, along with balance holes on the rear impeller cover plate. These features counteract axial thrust on the rotor, extending bearing life and improving operational stability.
Direct-Coupled Motor
The pump and motor share a common shaft, with the motor drive end supported by double angular contact ball bearings that absorb residual axial thrust. The pump and motor are factory-aligned on a shared baseplate. No field alignment is required during installation.
Piping Layout
The inlet is axial (horizontal), and the discharge points vertically upward. This configuration simplifies piping arrangement and allows straightforward integration with existing fire protection pipework.
Installation Guidelines
- Independent piping support: Piping weight must not rest on the pump body. Provide separate supports to prevent deformation.
- Anchor bolt integrity: Tighten anchor bolts firmly and inspect them periodically to prevent loosening that causes vibration during startup.
- Flow passage inspection: Before installation, check the pump flow passage for hard objects such as stones or metal debris that could damage the impeller.
- Valves and gauges: Install regulating valves on inlet and outlet piping, plus a pressure gauge near the discharge. For high-head installations, add a check valve upstream of the discharge gate valve to prevent water hammer during power loss.
- Suction-lift setups: Install a foot valve and ensure the inlet piping has no excessive bends and is free of air or water leaks.
- Manual rotation check: After installation, turn the pump shaft by hand. There should be no grinding noise or binding.
Start-Up and Operating Procedures
Pre-Start Preparation
- Manually turn the motor fan. The impeller should rotate freely without binding.
- Open the inlet valve and air vent valve until the pump chamber is fully flooded, then close the vent.
- Hand-turn the pump to allow lubricant to reach the mechanical seal faces.
- Jog the motor to confirm correct rotation direction.
Start-Up and Running
- Fully open the inlet valve and close the discharge valve.
- Energize the motor. When the pump reaches normal speed, gradually open the discharge valve and adjust to the desired operating point.
- Monitor instrument readings, check motor and bearing temperature rise, and address any abnormalities promptly.
Shutdown
- Gradually close the discharge valve, then cut power.
- Close the inlet valve.
- If ambient temperature drops below 0 C, drain all liquid from the pump to prevent freeze damage.
- For extended shutdowns, disassemble, clean, and properly store the pump.
Maintenance Schedule
- Keep inlet piping completely sealed. No air ingress is acceptable.
- Do not operate the pump under cavitation conditions for extended periods.
- Do not run the motor above rated current at high flow conditions for extended periods.
- Regularly monitor motor current to ensure operation within the design range.
- Assign dedicated personnel for monitoring during operation.
- After extended service, if noise and vibration increase due to mechanical wear, stop for inspection. Replace worn parts or bearings as needed. Standard overhaul interval: approximately one year.
Common Faults and Troubleshooting
| Fault | Common Causes | Remedy |
| No water output | Valves closed, piping blocked, incorrect motor rotation, air in suction line, pump not primed | Clear blockages, correct motor wiring, seal leaks, prime pump |
| Insufficient flow | Blockages, low voltage, worn impeller, restricted valve opening | Clear passages, stabilize voltage, replace impeller, adjust valve |
| Excessive power draw | Flow exceeds rating, high suction lift, bearing wear | Throttle flow, reduce suction lift, replace bearing |
| Noise and vibration | Unstable piping support, air in liquid, cavitation, bearing damage, motor overload | Secure piping, increase suction pressure, reduce vacuum, replace bearing |
| Motor overheating | Overload, friction, bearing failure, low voltage | Throttle flow, inspect for rubbing, replace bearing, stabilize voltage |
| Water leakage | Mechanical seal wear, casing crack, uneven seal face, loose bolts | Replace seal, repair casing, resurface seal face, tighten bolts |
Applications
Beyond fire protection, the XBD-W series is suitable for:
- Industrial and municipal water supply
- High-rise building pressurization
- Long-distance water transfer
- Heating system circulation
- Boiler feed water and hot and cold water circulation
- Air conditioning and refrigeration systems
- General equipment support and auxiliary applications
Why Choose Chaodun Pump
Chaodun Pump manufactures the XBD-W series with rigorous quality control, from hydraulic model selection to impeller balancing and mechanical seal specification. Every unit undergoes factory performance testing before shipment. Our engineering team provides application consulting, selection guidance, installation support, and after-sales service.
Contact us for performance curves, dimension drawings, and technical documentation specific to your fire protection project requirements.