IMO ACG 045N7 NTBP Pump Major Overhauling Kit & Coupling Set

IMO ACG 045N7 NTBP Pump Major Overhauling Kit Along With Coupling Set

Designed specifically for high-reliability marine propulsion and auxiliary machinery, the IMO ACG 045N7 NTBP Pump Major Overhauling Kit delivers OEM-grade restoration for ACG-series three-screw positive displacement pumps. The ACG 045N7 NTBP configuration is widely deployed across commercial vessels, FPSOs, and land-based power plants for main engine lubricating oil, fuel oil transfer, and heavy fuel oil (HFO) booster systems.

This comprehensive kit eliminates component mismatch by bundling precision-machined internal screw elements, high-integrity mechanical shaft seals, O-rings, gaskets, bearing assemblies, and a perfectly balanced coupling set. Engineered to withstand continuous heavy-load operations, every component meets strict metallurgical standards to prevent cavitation erosion, pressure drop, and premature volumetric efficiency loss.

Model Details:

• MPN: ACG-045N7-NTBP-OHK
• Manufacturer: IMO AB / CIRCOR
• Pump Series Compatibility: IMO ACG 045 Series (Generation 7, NTBP variant)

Technical Details

Key Features

1. Complete Overhaul Solution: Includes all essential wear parts—central power rotor, idler screws, mechanical seal face assembly, gaskets, and radial bearings—in a single package.
2. Precision-Matched Screw Set: Manufactured from case-hardened alloy steel with tight manufacturing tolerances to ensure optimal internal clearances and high volumetric efficiency.
3. Integrated Coupling Set: Supplied with a heavy-duty flexible coupling set engineered for vibration damping and precise shaft alignment under high torque loads.
4. High-Temperature Elastomers: Equipped with premium-grade O-rings and secondary sealing elements resistant to aggressive marine lubricants and high-temperature fuels up to 100°C.
5. Corrosion-Resistant Metallurgy: Built to withstand harsh marine environments, resisting chemical degradation from marine diesel oil (MDO), heavy fuel oil (HFO), and synthetic turbine oils.

Compatible Equipment Models

• IMO ACG Series: ACG 045N7, ACG 045N, ACG 045 series variants utilizing NTBP sealing arrangements.
• Marine Applications: Main engine lube oil service pumps, auxiliary blower lube units, fuel oil transfer skids, and hydraulic power units on MAN B&W, Wärtsilä, and Sulzer marine propulsion systems.

Part Number Cross-References

• IMO Part Numbers: ACG045N7-OHK, ACG-045-NTBP-KIT, IMO-ACG045-CP
• Industry Standard Cross-Ref: CIRCOR-IMO Screw Pump Rebuild Kit 045N7

Applications

• Marine propulsion main lubricating oil circulation
• Heavy fuel oil (HFO) supply and booster modules
• Diesel oil transfer and purification skids
• Hydraulic power and actuation systems in offshore drilling rigs
• Industrial turbine lubrication and cooling loops

Frequently Asked Questions

What components are included in the IMO ACG 045N7 NTBP overhauling kit?

The kit includes a complete set of precision-matched screws (power rotor and idler rotors), a mechanical seal assembly (NTBP specification), high-temperature O-rings, gaskets, ball bearings, and a matching flexible coupling set.

Is this kit compatible with older ACG 045 generations?

This specific kit is engineered for the Generation 7 (N7) NTBP configuration. While physical dimensions may look similar, older generations have slight thread pitch and seal housing variations. Verify your pump’s serial number plate before ordering.

Can I purchase the mechanical seal or coupling set separately?

Yes, individual components such as mechanical seals, coupling sets, and individual rotors can be ordered separately, though purchasing the major overhauling kit is recommended during scheduled 24,000-hour or major overhaul intervals to ensure balanced wear restoration.