6QD Series High-Speed Heavy-Duty Air Starter

Model Positioning

The 6QD Series is a heavy-duty pneumatic air starter designed for higher power demand and faster engine cranking. Engineered with a high-output turbine system and reinforced planetary gearing, it delivers high power density, with up to 14 kW of rated power, higher output speeds (up to 2460 r/min), and 54.3 N·m of torque. Compared to the 5QD Series, the 6QD delivers higher power and speed under the same 0.4–0.8 MPa operating pressures, making it well suited to larger displacement engine platforms in power generation, offshore marine, and heavy industrial applications.

Series-Specific Innovations & Highlights (6QD vs 5QD Performance Uplift)

  • Higher Power & Speed Output: The upgraded motor delivers a peak rated output of 14 kW and speeds up to 2460 r/min (compared with the 5QD’s 10 kW / 1900 r/min), supporting faster engine breakaway and rapid startup.
  • Higher Air Flow Capacity: Rated air consumption of 74 to 146.3 L/s supports high dynamic torque output during heavy initial compression cycles.
  • Reinforced Heavy-Duty Gear Reduction: Precision-machined planetary gear set converts high turbine rotational speed into robust startup torque (up to 54.3 N·m).
  • 360° Modular Clamp-Ring Positioning: Features a versatile modular housing with a quick-adjust 360-degree clamp ring, simplifying alignment and retrofitting in tight engine bays.
  • SAE Standard Direct Replacement: Built to SAE heavy-duty flange dimensions, enabling bolt-on replacement for conventional electric or air starters without modification to flywheel housings.

Engine Application Matrix

Optimized for medium-to-large diesel and gas engine platforms across standby generators, main/auxiliary marine power, and oilfield compression skids, including engines from Cummins, Weichai, Yuchai, Caterpillar, Volvo Penta, and Perkins.

Technical Specifications

Model Series6QD Series
Motor MechanismHigh-Output Turbine Motor with Heavy Planetary Reduction
Rated Operating Pressure0.4 MPa / 0.63 MPa / 0.8 MPa
Rated Output Power5.0 kW / 10.0 kW / 14.0 kW
Rated Speed1740 r/min / 2180 r/min / 2460 r/min
Rated Torque Output27.4 N·m / 43.8 N·m / 54.3 N·m
Air Consumption Rate74 L/s / 113.8 L/s / 146.3 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)51014
Parameters at Rated PowerRated Speed (r/min)174021802460
Rated Torque (N.m)27.443.854.3
Air Consumption (L/S)74113.8146.3