IMO Triple Screw Pumps
Genuine IMO three-screw pumps for lubrication, fuel supply, circulation & transfer
New and reconditioned IMO ACD, ACE, ACF and ACG triple-screw pumps, plus spares support for existing units. Matched to your part number, duty point and vessel or plant fluid — with pressure testing before dispatch on reconditioned units.
What a three-screw pump actually does
A single power rotor, driven by the motor, meshes with two idler rotors. As the screws turn, fluid is trapped in sealed cavities and pushed smoothly along the pump axis toward the outlet — no valves, no pulsing, no metal-on-metal wear.
Smooth, low-pulsation flow
Minimal pressure ripple compared to gear or piston pumps.
Self-lubricating by design
The pumped fluid lubricates the rotor set and, on ACE/ACF, the internal bearing.
Wide viscosity tolerance
From 1.4 cSt up to 5,000 cSt depending on series.
Built-in overpressure protection
Factory-set, field-adjustable relief valve on every series.
Two seal executions, one pump family
Each series is available with a Lube Line seal (carbon/carbide, Viton elastomers) optimised for light-duty lube and hydraulic oil, or a heavier Fuel Line seal (silicon carbide/silicon carbide) rated for higher-temperature fuel oil duty. This is set by the seal code in the model number — see the decoder below.
Keep an existing pump running
Minor/repair kits (seals, O-rings, gaskets) and rotor sets are stocked for ACD, ACE and ACG, with mechanical shaft seals available for ACF — useful if you just need to service a pump already onboard rather than replace it.
Browse minor kits & spares →Fluids handled
Any non-aggressive fluid with sufficient lubricating properties, across a viscosity range of 1.4 to 5,000 cSt depending on series and seal execution.
Industries & applications
The same rotor design covers duty across marine, power generation and heavy process industries.
ACD, ACE, ACF, ACG at a glance
All four are Std Line three-screw pumps from the same rotor family. The difference is scale, pressure headroom and how they're driven — pick by flow and duty, then confirm seal execution against your fluid.
| Spec | ACD | ACE | ACF | ACG |
|---|---|---|---|---|
| Flow range | 10–42 l/min | 10–180 l/min | 310–2,900 l/min | 80–1,200 l/min |
| Max differential pressure | 7 bar | 16 bar | 16 bar | 16 bar |
| Max discharge pressure | 12 bar | 16 bar | 16 bar | 16 bar |
| Max inlet pressure | 7 bar | 7 bar | 7 bar | 12 bar |
| Max speed | 3,600 rpm | 3,600 rpm | 1,800 rpm | 3,600 rpm |
| Viscosity range | 1.4–1,500 cSt | 1.4–3,500 cSt | 1.4–5,000 cSt | 1.4–3,500 cSt |
| Max fluid temperature | 90°C | 155°C (Fuel Line) | 130°C | 155°C (Fuel Line) |
| Bearing arrangement | Carried by motor bearing | Internal, fluid-lubricated | Internal, fluid-lubricated | External, grease-lubricated |
| Mounting | Short-coupled to IEC071 motor | Connecting frame + flexible coupling | Connecting frame + coupling; TRIPOD for vertical | Connecting frame + flexible coupling |
| Typical duty | Compact lube / circulation / transfer | Lube + fuel supply, mid-range flow | Main/prelube diesel engine duty, high-flow transfer | Mid-flow lube, transfer, supply & circulation |
Reference documents: ACD6 Std Line, ACE3 Std Line, ACF5 Std Line (also valid for UCF Gen.5), ACG7 Std Line. Not sure which series fits your application? Use the pump selector below and we'll confirm it for you.
How to read the model code
Every series follows the same logic. Once you can read one, you can read a part number from any of the four families — useful for cross-checking what's actually fitted before you order a replacement.
How we supply ACD / ACE / ACF / ACG
Three ways to fill the same requisition, depending on your budget, lead time and dry-dock schedule.
Quotes built around how you actually buy
Two roles, two priorities — we work to both in the same quote.
Part number accuracy
Every quote is checked against the full model code, not just a series name, so what arrives matches what's fitted.
Spec & compatibility sign-off
Flow, pressure, viscosity and seal execution confirmed against your engine or system before dispatch.
Condition transparency
Clear labelling of new, reconditioned or spares status on every listing — no ambiguity at goods-in.
Pressure-tested before dispatch
Reconditioned units are tested at full pressure prior to shipping (ACF excluded); testing video available on request.
Two entities, one stock pool
Amin Corporation (India) and Aminco Machinery and Spares Trading FZCO (UAE) both draw from the same catalogue.
Stock & lead-time clarity
Availability confirmed at quote stage — important when you're working against a dry-dock or port-call window.
Common questions from procurement & superintendents
Can't find what you need here? Use the pump selector below or reach us on WhatsApp.
How do I know which pump I need?
What's the difference between New, Reconditioned and Spares Support?
Do you ship worldwide?
What's your return policy?
How do I get a quote or place an order?
Where are you located?
Not sure which pump fits?
Send us the duty case — we'll match the series for you.
Tell us what you know. A part number, or flow/pressure/fluid — whatever you have.
We match the pump. Checked against the full model code and duty point.
Confirm & dispatch. New, reconditioned or spares — quoted with lead time.
IMO® and Imo Pump® are trademarks of their respective owner. Amin Corporation and Aminco Machinery and Spares Trading FZCO supply genuine IMO pumps sourced through authorised channels, together with independently sourced replacement spares; spares are not manufactured or endorsed by IMO. Technical data on this page is drawn from IMO product documentation for the ACD, ACE, ACF and ACG Std Line series and is provided for reference — confirm exact duty limits for your application before ordering.