LD4H Series Fire Pump Diesel Engine
30-60 HP Fire Fighting Pump Drive
LD4H Series Fire Pump Diesel Engine
Product Overview
The LD4H series fire fighting pump diesel engines cover 30-60 HP (22-45 kW) at a rated speed of 3000 r/min. Four-cylinder engines, naturally aspirated across the range with a turbocharged LD4H60Z at the top, they pair compact dimensions with easy installation and maintenance for light and medium fire pump sets.
Key Features
- Full series designed at 3000 r/min, covering 30-60 HP, fitting pump set power 25-50 HP
- Rated power tested by factory per China standard method (without radiator)
- High-quality components for stronger, more durable power output
- Naturally aspirated models with a turbocharged LD4H60Z, electric starting with 12V or 24V options
Technical Specifications
| Model | Rated Power/Speed (kW/r/min) | Intake | Cylinders-Bore×Stroke (mm) | Displacement (L) | Min Fuel Consumption (g/kW·h) | Oil Capacity (L) |
|---|---|---|---|---|---|---|
| LD4H30 | 22/3000 | Natural | 4-90×100 | 2.5 | ≤200 | 6-10 |
| LD4H40 | 29/3000 | Natural | 4-90×100 | 2.5 | ≤200 | 6-10 |
| LD4H50 | 36/3000 | Natural | 4-90×100 | 2.5 | ≤200 | 6-10 |
| LD4H60Z | 45/3000 | Turbocharged | 4-90×100 | 2.5 | ≤200 | 6-10 |
Series common specifications: direct injection, vertical, inline, 4-stroke; water cooled; electric starting, 12V or 24V; noise limit ≤102 dB(A); meets the 4-hour continuous operation standard for fire fighting duty.
Performance Curve
Performance curve shown for LD4H60Z, a representative model of this series.
| Engine Speed (r/min) | Power (kW) |
|---|---|
| 3000 | 45 |
| 2800 | 44 |
| 2600 | 42 |
| 2400 | 40 |
| 2200 | 37 |
| 2000 | 33 |
| 1800 | 28 |
Applications
- Fire pump set drive
- Fire truck pump drive
- Fixed fire protection systems
- Industrial and municipal fire protection