IMO ACE 025L3 NTBP Screw Pump | 2017 Marine Fuel & Lube Oil Pump

The IMO ACE 025L3 NTBP Low-Pressure Screw Pump

The IMO ACE 025L3 NTBP is a rotary screw pump with positive displacement that works quite well. It was made for low-pressure use, but it works well in tough places like ship engine rooms, power plants, and industrial hydraulics. This 2017 model is the best that IMO has ever made, with tight tolerances and the best volumetric efficiency.

People know the ACE 025L3 NTBP (this 2017 model in particular) for its long life and hydraulic balance. Gear pumps can get cavitation and damage from pulses, but the ACE’s three-screw design gives you a smooth, axial flow that keeps your downstream filters and instruments safe.

The NTBP variation is very important. It has a mechanical seal and is made for internal bypass, which makes it very reliable for high-viscosity fluids like HFO or special lubrication oils where keeping pressure steady is a must.

Technical Data:

Features:

1. No Pulsation Delivery: The three-screw shape makes sure that the flow is steady and smooth, which cuts down on noise and vibration in the piping system.
2. High Volumetric Efficiency: Power and idler screws that have been machined to a precise level reduce internal slip, making sure that the flow is steady even when the temperature changes.
3. Self-Priming Capability: It has great suction lift properties, which makes it perfect for moving things from one tank to another.
4. Mechanical Seal Longevity: The NTBP arrangement has a shaft seal that is made to last even when it expands due to heat or chemicals.
5. Small Size: Made for tight marine skids, making it easy to add to existing fuel modules.

Maintenance Guide From NDMarineTech’s Engineer:

• Suction Strainer Integrity: Never run this pump without a suction strainer (mesh size $< 0.6$ mm). Screws are precision-machined; a single weld bead or piece of grit can score the housing, leading to permanent pressure loss.
• Mechanical Seal Monitoring: Check the tell-tale hole daily. Minor weeping is normal during startup, but consistent dripping indicates seal face wear or a hardened O-ring.
• Alignment Check: Since this is a 2017 unit, if you are re-installing it, perform a laser alignment between the pump and the motor. Even 0.05mm of offset can cause premature bearing failure.
• Dry Run Prevention: These pumps rely on the pumped fluid for lubrication of the idler screws. Always ensure the pump casing is primed before initial startup after a layup.
• Bearing Lubrication: While the NTBP is largely self-lubricating via the fluid, ensure the motor-side bearing is greased according to the hourly schedule (typically every 2,000–4,000 hours).