Description
Ingersoll Rand ST400C03R29 Turbine Air Starter (ATEX)
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. Thanks to lube-free technology and certified ATEX compliance, this starter is fully equipped for safe operation even in explosive industrial atmospheres.
Technical Overview – ST400C03R29
ST400C03R29 is a pre-configured ST400 series variant, where the model code defines specific mounting and operating parameters:
- ST400 (44% ARC): High-pressure series designed for working pressures up to 10.3 bar, providing maximum starting torque and optimal air efficiency.
- C: Gear ratio / reduction gear configuration.
- 03: Flange type (SAE 3 flange).
- R29: Rotation direction (clockwise / Right-hand) with specific pinion code R29.
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.
ATEX Explosion Protection Directive
The starter complies with the European ATEX directive for use in potentially explosive atmospheres (as a component for incorporation):
- ATEX marking: Ex II 2 GD c IIB 70°C X
- Classification: Group II, Category 2 (Gases and Dust / Zone 1 and 21)
- Max. surface temperature: 70°C
Technical Data at 9.3 bar Working Pressure
Performance specifications for model ST400C03R29 at a nominal working pressure of 9.3 bar:
| Parameter | Value |
|---|---|
| Model | ST400C03R29 |
| ATEX certification | Yes (Ex II 2 GD c IIB 70°C X) |
| Maximum allowable pressure | 10.3 bar (150 psi) |
| Nominal working pressure | 9.3 bar |
| Starting moment (Breakaway Torque) | ~183 Nm |
| Maximum power | ~22 HP (16.4 kW) |
| Speed at max power | ~1650 rpm |
| Air consumption (Flow) | ~318 L/s |
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
Why choose Protech?
With over 20 years of experience in starter OEM support and service, and as the only authorized service workshop for air starters in the entire Nordic and Baltic region, we ensure that your equipment meets all technical and safety requirements (including ATEX).
Download turbine air starter catalog:
ESS Air Starters Catalogue (PDF) – ST400 series and configurations
Request a quote or technical advice
Would you like to check this model’s compatibility with your engine, or do you need spare parts and authorized service? Our technical team answers within 1 business day.
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