5QD Series High-Efficiency Single-Turbine Air Starter

Model Positioning

The 5QD Series is a highly efficient single-turbine pneumatic air starter engineered to deliver reliable engine cranking under flexible operating pressures. Featuring an advanced 3-stage turbine drive coupled with precision planetary gear reduction, it converts air pressure into smooth mechanical rotational force with exceptional energy efficiency. Delivering up to 10 kW of rated power and 50 N·m of torque, the 5QD Series is equipped with a 360-degree adjustable clamp-ring casing, making it an ideal, easy-to-maintain solution for space-constrained industrial power generation, marine pumps, and skid-mounted compressors.

Series-Specific Innovations & Highlights

  • High-Efficiency 3-Stage Single-Turbine Architecture: Converts compressed air energy into rotational drive with high pneumatic efficiency, ensuring strong starting torque across a 0.4 to 0.8 MPa pressure range.
  • Planetary Gear Reduction & Torque Amplification: Heavy-duty planetary gearing scales up torque output (up to 50 N·m) while maintaining optimal cranking speeds (up to 1900 r/min) to overcome initial engine resistance smoothly.
  • 360° Modular Clamp-Ring Mounting: The flexible modular casing connected via a quick-adjust clamp ring enables full 360-degree rotational alignment, simplifying installation in cramped engine compartments.
  • Low Operating Pressure & Easy Servicing: The 3-stage turbine design starts the engine at relatively low air pressure (rated 0.4 to 0.8 MPa), and the simple structure makes field maintenance straightforward and cost-effective.
  • Standard SAE Direct Replacement: Machined to standard SAE heavy-duty flange specifications, allowing direct bolt-on replacement of conventional electric starter motors without modifying engine flywheel housings.

Engine Application Matrix

Field-proven across diesel and gas engines in marine auxiliaries, mobile fire pump units, and standby generator sets, including platforms from Cummins, Weichai, Yuchai, Caterpillar, Volvo Penta, and Perkins.

Technical Specifications

Model Series5QD Series
Motor Mechanism3-Stage Single-Turbine with Planetary Reduction
Rated Operating Pressure0.4 MPa / 0.63 MPa / 0.8 MPa
Rated Output Power4.0 kW / 7.0 kW / 10.0 kW
Rated Speed1550 r/min / 1850 r/min / 1900 r/min
Rated Torque Output24.5 N·m / 36.0 N·m / 50.0 N·m
Air Consumption Rate70 L/s / 105 L/s / 125 L/s
Mounting InterfaceModular Casing with 360° Adjustable Clamp-Ring
Flange StandardsSAE Standard Heavy Flanges
Rotation DirectionClockwise (CW) / Counter-Clockwise (CCW)
Operating EnvironmentHigh and low temperature tolerance
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Parameters

Rated Pressure (Mps)0.40.630.8
Rated Power (K/W)4710
Parameters at Rated PowerRated Speed (r/min)155018501900
Rated Torque (N.m)24.53650
Air Consumption (L/S)70105125