Description

Ingersoll Rand ST400C03R29 turbine air starter is part of the ST400 series of compact, high-performance starting solutions designed for diesel and gas engines operating in demanding industrial environments. This is a specifically configured model, providing smooth and reliable engine starts in applications where electric starting systems are impractical or not recommended.

The ST400 series is based on a high-efficiency turbine motor design, where compressed air is directed through a high-speed rotating turbine. This design delivers strong starting torque, rapid acceleration, and an excellent power-to-weight ratio compared to traditional vane-type air starters. Turbine technology minimizes mechanical wear and is particularly well suited for applications with frequent starts and critical reliability requirements.

Technical Overview – ST400C03R29

ST400C03R29 is a pre-configured ST400 series variant, where the model code defines specific mounting and operating parameters:

• Series: ST400 (turbine air starter)
• ARC: 44% – balanced airflow and starting torque
• Operating pressure: 90–150 psi (6.2–10.3 bar)
• Maximum power: up to approx. 25 HP (19 kW), depending on pressure
• Flange: SAE 3
• Rotation: Right-hand
• Starting type: Pre-engaged

This configuration is suitable for diesel engines approximately in the 5–60 liter range, depending on starting conditions, engine condition, and available system pressure.

ARC (%) – Why it matters

ARC (Air Restriction Control) defines how much inlet air is utilized during the starting process.
A 44% ARC provides a balanced combination of fast response and controlled engagement, making it suitable for a wide range of industrial engines requiring smooth and repeatable starting performance.

Key Benefits

• Compact and lightweight design – easy installation, even in confined spaces
• Turbine technology – excellent power-to-weight ratio
• Low maintenance requirement – turbine motor requires no external lubrication
• Pre-engaged starting – reduced shock loads and minimized gear wear
• Industrial-grade reliability – suitable for harsh and demanding environments

Typical Applications

• Marine engines and auxiliary generators
• Power generation
• Industrial diesel and gas engines
• Stationary and off-highway applications

*ST400 series starters are highly configurable. If a different ARC, flange, gear ratio, pinion, rotation, or mounting orientation is required, we strongly recommend selecting the configuration together with our technical support team.

Download turbine air starter catalog:

Professional tools in Sweden and the Nordics.