Product Overview

The Diesel Engine-Driven Long-Shaft Fire Pump is a vertical fire pump system powered by a diesel engine, featuring a long-shaft configuration that positions the pump impeller at depth while keeping the diesel engine accessible at ground level. This design is particularly suitable for applications where the water source is located below ground level, such as underground fire water tanks or deep wells.

Powered by a diesel engine, this fire pump delivers excellent starting characteristics and strong overload capacity for dependable operation during fire emergencies without reliance on external electrical power. Depending on regional terminology, it may also be referred to as a Vertical Long-Shaft Diesel Fire Pump, Deep-Well Diesel Fire Pump.

Key Features

• Excellent starting characteristics for reliable fire pump activation during emergencies
• Strong overload capacity to maintain rated flow under demanding fire protection conditions
• Long-shaft vertical design enables the pump impeller to be positioned at depth while the diesel engine remains at ground level
• Compact structural arrangement with efficient space utilisation
• High level of automation for reliable, unmanned operation during fire events
• Simple operation and straightforward maintenance access at ground level

Applications

• Fire hydrant fire suppression systems for commercial and industrial buildings
• Automatic sprinkler fire protection systems
• Water mist fire suppression systems
• Fire protection water supply drawing from underground fire water tanks or deep wells
• Industrial facility fire protection including factories and mines
• Fire protection for residential buildings, hotels, office complexes, commercial buildings, hospitals and mining operations

Customer Benefits

Power-Independent Operation

The diesel engine provides reliable fire pump activation without dependence on external electrical power, ensuring fire protection continues during power outages or electrical system failures.

Deep Water Source Capability

The long-shaft vertical design enables the pump impeller to be positioned at depth below ground level, allowing fire water supply from underground tanks, deep wells or other subterranean water sources.

Strong Overload Capacity

The diesel engine-driven configuration delivers robust overload capacity, maintaining the required flow and pressure under demanding fire protection conditions where extended operation at or above rated capacity may be required.

Ground-Level Engine Access

With the diesel engine positioned at ground level, routine inspection, maintenance and refuelling can be performed without accessing the pump pit, improving safety and reducing maintenance complexity.

High Automation Level

Advanced control systems enable automatic start-up, pressure monitoring and fault detection, reducing the need for manual intervention during emergency events and improving system reliability.

Versatile Fire Protection Coverage

With a pressure range up to 2.3 MPa and flow rates up to 220 L/s, the pump serves fire hydrant systems, automatic sprinkler systems and water mist suppression systems across diverse building types and occupancy classifications.

Technical Specifications

Parameter	Specification
Product Type	Diesel engine-driven long-shaft fire pump
Flow Rate	30-220 L/s
Pressure	0.5-2.3 MPa
Motor Power	30-450 kW
Rotational Speed	2900 / 1800 / 1500 r/min
Drive Type	Diesel engine
Pump Type	Vertical long-shaft centrifugal pump

Selection Guidance

To select the appropriate diesel engine-driven 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 source depth and configuration
• Available installation space and pump room dimensions
• Local fuel supply and storage requirements
• Required duty point on the pump curve
• 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 fire pump set should be installed on a rigid, level foundation with adequate clearance for inspection, maintenance and diesel engine ventilation. The suction piping from the underground water source must be properly sized and configured. A properly sized fuel tank with adequate fuel reserve must be provided for the diesel engine. The long-shaft assembly must be correctly aligned between the diesel engine at ground level and the pump impeller at depth.

Pre-Commissioning Inspection

Before commissioning, confirm the following:

• Pump and diesel engine are securely mounted and level
• Suction piping connections are complete and leak-free
• Fuel tank is filled with the correct grade of diesel fuel
• Engine coolant and lubricating oil levels are correct
• Starting batteries are charged and connections are secure
• Control panel wiring and settings are verified
• Rotational direction matches the arrow indicated on the pump casing
• Long-shaft alignment is verified

Routine Maintenance

Regular inspection should include:

• Weekly no-load test run of the diesel engine
• Monthly load test under fire protection system conditions
• Checking engine oil, coolant and fuel levels
• Inspecting batteries and charging system condition
• Verifying that the pump maintains the required flow and pressure during test runs
• Inspecting all pipeline connections for signs of leakage

Available Configurations

• Flow rates from 30 to 220 L/s
• Pressure range from 0.5 to 2.3 MPa
• Diesel engine powers from 30 to 450 kW
• Rotational speeds: 2900 / 1800 / 1500 r/min
• Various shaft lengths for different installation depths
• Integrated control panels with automatic start and monitoring

FAQs

What is a diesel engine-driven long-shaft fire pump?

It is a vertical fire pump powered by a diesel engine with a long-shaft design that positions the diesel engine at ground level while the pump impeller is located at depth, enabling fire water supply from underground sources.

What is the flow range?

The available flow range is 30 to 220 L/s, suitable for medium to large fire protection systems.

What is the pressure range?

Available pressures range from 0.5 to 2.3 MPa.

What fire protection systems can this pump serve?

It is suitable for fire hydrant systems, automatic sprinkler systems and water mist fire suppression systems in residential, commercial, industrial and institutional buildings.

Why use a long-shaft design?

The long-shaft design allows the diesel engine to be positioned at ground level for easy access and maintenance while the pump impeller can be located at depth to draw water from underground tanks, wells or other subterranean water sources.

What maintenance is required?

Regular maintenance includes weekly no-load test runs, monthly load tests, engine oil and coolant checks, battery inspection and pipeline connection inspection.

Contact Chaodun

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

Website: https://chaodunpump.com

Email: Suzion@chaodunpump.com

WhatsApp: +44 751 8050 473