M28 Pre-engaged Hydraulic Starter Motor
IPU’s M28 pre-engaged hydraulic starter motor provides guaranteed reliability, no matter how challenging or unpredictable the environment. IPU’s M28 and M22 hydraulic starter motors are unique in being ATEX-approved for use in gas and mining environments. Compliance with ATEX means they are safe for use in explosive and potentially explosive applications.
The M28 pre-engaged hydraulic starter is ATEX-approved. IPU’s starting systems are also certified to many other standards.
Cast iron casing
ATEX regulations strongly discourage the use of aluminium in mining and other explosive environments. This is because aluminium is a key ingredient in a thermite reaction. Such a reaction in an explosive environment would be catastrophic! IPU’s starter motors remove this risk by using a cast iron outer casing.
Unfortunately, many aluminium-cased starters are still sold into mining environments despite the ATEX recommendations. This falls short of the standards promoted by the ATEX regulations and is inherently dangerous.
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A pre-engaged starter motor
Traditional ‘inertia’ starting has the possibility of producing sparks when the rapidly spinning pinion engages with the engine’s stationary ring-gear. ATEX regulations require starter motors to be ‘pre-engaged’. IPU’s pre-engaged M28 starter motor fully engages the pinion with the ring-gear before rotating at high speed.
Non-spark pinions
The M28 pre-engaged hydraulic starter is also available with a beryllium-copper pinion to further reduce the risk of sparks. This is an optional extra safety precaution over and above the protection offered by the pre-engaged system.
Marine class approval
IPU’s starting systems can be class approved to numerous marine certification standards. This is done on a case by case basis according to specific customer specifications.
Flexible to suit any engine configuration
The orientation of the M28 can be rotated to suit almost any engine configuration. This is achieved by rotating the flange of the standard model. If the configuration is particularly difficult IPU can provide a custom flange to suit.
M28 Hydraulic Starter Motor Power Curve
Simple maintenance
The M28 pre-engaged hydraulic starter motor is a low maintenance solution that’s reliable in all conditions, including sub-zero and high temperature environments. It requires virtually no attention other than replacing the filter element and periodically checking the gas pre-charge and system pressure.
Parts such as spacers, flanges and pinions used on the M28 are also common to IPU’s air starter range. This helps remote and offshore sites simplify stock-holding and improve interchangeability.
Video: 360 degree view of M28 starter motor
M28 pre-engaged hydraulic starter specifications
| Weight (typical) | 12 kg |
| Construction | Cast iron |
| Maximum working pressure | 21 MPa (3000 PSI) |
| Fluid media | Mineral oil |
| Viscosity range | ISO 32 to 46 (SUS 140-230) |
| Temperature range | -30°C to +100°C (-22°F to +212°F) |
| Speed range | 0-4000 rpm |
| Rotation | Standard: Clockwise (Optional: Counter-Clockwise) |
| Duty cycle | Intermittent |
| Overall volumetric efficiency | 92% (Minimum) |
| Displacement | 28 cc (1.71 cu.in.) |
| Maximum torque at 210 Mpa (1500 psi) | 84 Nm (62 lbf.ft.) |
| Maximum power at 3500 rpm | 31 kW (41 HP) |
