Product Overview

The XBD-GJ Series Long-Shaft Fire Pump features a bottom-suction vertical configuration designed for installation directly above a water pool or fire water tank. The long-shaft arrangement positions the pump impeller at depth below the water surface while keeping the motor accessible at ground level, eliminating the need for a separate pump room and reducing construction costs.

This fire pump provides reliable fire protection water supply for fixed fire protection systems in industrial facilities, substations and tunnels. Depending on regional terminology, it may also be referred to as a Vertical Long-Shaft Fire Pump, Bottom-Suction Fire Pump, Long-Shaft Fire Pump or XBD-GJFire Pump.

Key Features

• Bottom-suction vertical configuration enables installation directly above a water pool, saving space
• Eliminates the need for a separate pump room, reducing construction costs
• Long-shaft design positions the impeller at depth while keeping the motor accessible at ground level
• Suitable for both fire protection and domestic/production water supply applications
• Reliable fire protection water supply for fixed fire systems in industrial facilities, substations and tunnels
• Efficient hydraulic design for reduced energy consumption during operation

Applications

• Fire hydrant fire suppression systems in industrial facilities
• Fixed fire protection systems for substations and electrical installations
• Fire protection water supply for tunnels and underground infrastructure
• Automatic sprinkler fire protection systems in industrial buildings
• Domestic and production water supply in addition to fire protection duties
• Industrial and commercial building fire protection where space constraints preclude a dedicated pump room

Customer Benefits

Space-Saving Installation

The bottom-suction vertical configuration enables the pump to be installed directly above the fire water pool, eliminating the need for a separate pump room and reducing the overall footprint of the fire protection installation.

Reduced Construction Costs

By eliminating the requirement for a dedicated pump room building, the XBD-GJ Series reduces construction costs, making it an economical solution for fire protection water supply in industrial and commercial installations.

Accessible Motor Maintenance

With the motor positioned at ground level and the impeller submerged in the pool, routine motor inspection and maintenance can be performed without accessing the pump pit, improving safety and reducing maintenance complexity.

Versatile Application Range

In addition to fire protection duties, the XBD-GJ Series can serve domestic and production water supply applications, providing a versatile pumping solution for industrial installations.

Wide Operating Range

With flow rates from 1 to 220 L/s and pressures from 0.32 to 2.0 MPa, the XBD-GJ Series covers a broad spectrum of fire protection system requirements, from small fixed fire systems to large industrial installations.

Reliable Fire System Readiness

The bottom-suction configuration provides positive suction head from the fire water pool, ensuring reliable priming and immediate water delivery during fire emergencies.

Technical Specifications

Parameter	Specification
Product Series	XBD-GJ Series
Pump Type	Bottom-suction long-shaft fire pump
Flow Rate	1-220 L/s
Pressure	0.32-2.0 MPa
Motor Power	3-400 kW
Rotational Speed	2900 / 1450 r/min
Outlet Diameter	DN50-DN300
Installation Type	Vertical long-shaft above water pool

Selection Guidance

To select the appropriate XBD-GJ Series long-shaft fire pump, please provide the following information:

• Required flow rate (L/s)
• Required pressure (MPa or bar)
• Fire protection system type (hydrant, sprinkler, water mist)
• Building type and occupancy classification
• Water pool depth and configuration
• Available installation space above the water pool
• Available voltage and frequency
• Applicable fire protection standards and codes

Final model selection should be confirmed according to the actual duty point, system requirements and applicable fire protection standards.

Installation and Maintenance

Installation Guidance

The pump should be installed directly above the fire water pool with adequate clearance for motor access and maintenance. The long-shaft assembly must be properly aligned between the motor at ground level and the pump impeller at depth. The discharge piping must be properly supported to prevent load transfer to the pump flanges.

Pre-Start Inspection

Before starting the pump, confirm the following:

• Motor is securely mounted and level
• Long-shaft alignment is verified and connections are secure
• Water pool level meets the minimum requirement for positive suction
• Discharge piping connections are complete and leak-free
• Motor wiring is correct and terminals are secure
• Rotational direction matches the arrow indicated on the pump casing
• All fasteners are properly tightened

Routine Maintenance

Regular inspection should include:

• Checking mechanical seals for leakage
• Monitoring motor bearing temperature and vibration levels
• Verifying that the pump maintains the required flow and pressure during test runs
• Inspecting long-shaft bearings and alignment
• Inspecting all pipeline connections for signs of wear or leakage

Available Configurations

• Flow rates from 1 to 220 L/s
• Pressure range from 0.32 to 2.0 MPa
• Motor powers from 3 to 400 kW
• Rotational speeds: 2900 / 1450 r/min
• Various shaft lengths for different water pool depths
• Outlet diameters from DN50 to DN300

FAQs

What is a long-shaft fire pump?

It is a vertical fire pump with an extended drive shaft connecting the motor to a submerged pump impeller, enabling installation directly above a water pool without requiring a separate pump room.

What is the flow range of the XBD-GJ Series?

The XBD-GJ Series offers flow rates from 1 to 220 L/s, suitable for small to large fire protection systems.

What is the pressure range?

Available pressures range from 0.32 to 2.0 MPa.

What fire protection systems can this pump serve?

It is suitable for fire hydrant systems, automatic sprinkler systems and fixed fire protection systems in industrial facilities, substations, tunnels and commercial buildings.

Why use a bottom-suction design?

The bottom-suction configuration enables the pump to be installed directly above the fire water pool, eliminating the need for a separate pump room and reducing construction costs while providing positive suction head for reliable priming.

Can this pump be used for domestic water supply?

Yes. The XBD-GJ Series is also suitable for domestic and production water supply applications in addition to fire protection duties.

Contact Chaodun

For product selection, technical data, performance information or project quotations, please contact Shanghai Chaodun Machinery Manufacturing Group Co., Ltd.

Website: https://cd-pump.cc

Email: Suzion@cd-pump.com

WhatsApp: +44 751 8050 473