Atlas Copco 2989015900 K-26 Oil-Injected Screw Service Stage

Description

The 2989015900 is the Atlas Copco service stage of the K-26 oil-injected screw element, listed under the designation SERVICE STAGE K-26. It serves the upper part of the mid-range fixed-speed portfolio: the GA 30, GA 37, GA 45 and GA 55 C compressors, all oil-injected screw machines for general plant air.

The number carries one ordering detail that matters before any purchase: current orders for this stage are directed to the element 2989020800. Machines in the field keep the 2989015900 in their documentation, so the two numbers describe the same stage position on the compressor. This article sets out the identity of the stage, the machines it serves, the way the element works and the figures you need before ordering.

Identity of the 2989015900 Service Stage

Service stages are the heaviest spare parts a compressor plant orders, and the K-26 sits at a power level where the order has to be right the first time. Reading the designation and the ordering direction together is what keeps the purchase straightforward.

What the SERVICE STAGE K-26 Designation Covers

The 2989015900 is listed with the designation SERVICE STAGE K-26. The designation names the K-26 stage size, and SERVICE STAGE marks the part as the service-track unit of that stage: the complete compression module supplied for renewal work, with rotors, housing, bearings and shaft sealing arriving as one serviced assembly. The stage belongs to the oil-injected screw family, which is also visible in its rate group, listed as S3K Oil injected screw, Element.

At 120.00 kg the stage is a machine-room handling job rather than a bench-top swap, which is typical for this power band. Reading the designation together with the tag on the old element is the fastest way to fix the identity of the part you need before the order is placed.

The rate group makes the track concrete for the buyer. The item is listed under S3K Oil injected screw, Element, which places the 2989015900 among the service stages of the oil-injected screw element family rather than among small catalog parts. An order under this group arrives as the complete serviced assembly, and the 2989015900 is the number your machine documentation carries for it.

Where Orders Go Today: the 2989020800 Element

Atlas Copco directs current orders for this stage to the element 2989020800. The direction applies to renewals of the K-26 stage across the machine range listed below, and it is the number that appears on current order confirmations. The 2989015900 remains the reference in the documentation of installed machines, in older quotations and in maintenance systems, so both numbers keep appearing in real service work.

In practice the ordering conversation runs like this. A plant reads the code on the old element tag, finds the 2989015900, and the order is then placed under the current element 2989020800. Seadweer performs this check with every quotation, so the number in the machine file and the number on the order never contradict each other.

Nothing about the direction changes the machine itself. The K-26 stage stays the K-26 stage, the mounting points stay the same, and the documentation of the installed machine keeps the 2989015900 as its stage identity. The current element is simply the number the order travels under today, and the only mistake worth guarding against is mixing the two references inside one purchase order.

For spare-part planning the direction simplifies the shelf. One current element reference covers the renewal demand of the whole GA group served by the K-26 stage, and the 2989015900 stays in the records as the stage identity of the installed machines.

Compressors That Use the 2989015900 Stage

The confirmed machine list for this stage covers four fixed-speed models across one power band. All of them are oil-injected screw compressors built around the same K-26 core.

GA 30, GA 37, GA 45 and GA 55 C

The 2989015900 stage serves the GA 30, GA 37, GA 45 and GA 55 C compressors. These are fixed-speed oil-injected screw machines for general plant air, and the band they cover is where a single compressor often carries a whole production section. In each of these machines the K-26 stage is the working core that turns motor power into compressed air, and a renewal of that core is ordered through the service track described above.

The four models share the stage, which matters for sites that run several of them side by side. One stage identity, one set of handling data and one ordering conversation cover the whole group, regardless of which machine the element comes out of.

The GA 55 C closes the upper end of the band, and the same K-26 core runs from the GA 30 upward through the range. A plant that moves from one machine to a larger model inside this band keeps the same stage logic in its records, and the 2989015900 remains the reference in the documentation of each installed unit.

What One Shared Stage Means for Spares Planning

A shared stage changes how a plant plans its heaviest spare. Instead of holding separate renewal positions for each machine, the maintenance system carries one stage identity — the 2989015900 — for the GA group, and the current element 2989020800 is the ordering reference behind it. The documentation of a GA 30 and a GA 55 C therefore points at the same spare-part strategy.

Planning around a 120.00 kg serviced assembly also means thinking about handling before the delivery day: lifting gear, floor route and mounting clearance at the machine. Seadweer confirms the package details with the quotation, so the workshop knows what arrives before it arrives.

Confirming Fitment Before Ordering

Element renewal is the one spare-part order where the model name alone is not enough. Read the code on the old element tag, find the 2989015900 in the machine file, note the compressor model and serial, and send all three to Seadweer. The team checks the number against the machine build and confirms the order under the current element 2989020800, with the stage identity kept in the records of your machine. One pass of verification removes the wrong-part risk entirely.

How the Oil-Injected Screw Stage Works

The K-26 is an oil-injected screw element, and its working principle explains both its efficiency and its service profile. Two intermeshing helical rotors spin inside a precision-bored housing. Injected oil seals the running clearances between the rotors, carries compression heat away and lubricates the bearings, so the rotors stay separated by an oil film rather than metal-to-metal contact.

Because the oil does three jobs at once, the stage holds its efficiency over long runs, and wear concentrates in the bearings rather than in the rotors themselves. Air enters the element after filtration, is compressed along the rotor path, and leaves at the working pressure; the oil is removed downstream by the separator of the host machine. The 2989015900 renews this core as one serviced unit: the internal rotors, the precision housing, the bearing set and the shaft sealing arrive together, while oil separation, cooling, drive and control components stay part of the host machine.

Keeping the swap clean also depends on the surrounding service work. The oil circuit of the host machine is refreshed at the same visit, the separator and filters are checked, and the new stage is run in under observation so the pressure band and oil temperature settle back to their normal readings. A renewal at this power level therefore lands as a complete stage restoration on the machine, and the operating records keep a clean before-and-after picture for the maintenance file.

Wear Signs and Renewal Timing

An oil-injected stage of this size usually announces its aging through measured trends long before it fails outright, and the trends are readable with the instruments most plants already run.

Possible Warning Signs

Possible signs of element wear can include rising specific energy, drifting discharge pressure, unusual noise or vibration, higher oil temperature and metal traces in the oil sample. Specific power climbs first in many cases, because widening internal clearances let compressed air slip back instead of leaving the stage. Any one of these trends on a GA 30, GA 37, GA 45 or GA 55 C is a reason to inspect the element and plan the renewal around the 2989015900.

Timing the Renewal

Oil-injected elements are commonly overhauled somewhere in the 20,000 to 40,000 running-hour band as a family-level reference, but the real timing follows the condition of your machine and the applicable service documentation rather than a fixed hour target. Vibration checks, oil analysis and temperature trends predict bearing condition long before a fixed count is reached. A planned renewal with the 2989015900, ordered under the current element 2989020800, beats an unplanned stop, because bearing fatigue left alone can let the rotors seize, which in most cases writes the element off instead of allowing a repair.

Technical Specifications

The tables below collect the identification and physical data of the 2989015900 in one place, exactly as the item data lists them.

Part Identification

Dimensions and Weight

The 120.00 kg weight and the 55 × 50 × 45 cm box describe the serviced stage as packed. These figures are the item data of the 2989015900 for handling and logistics reference, and Seadweer confirms the current package details with the quotation.

FAQ

What is the difference between 2989015900 and 2989020800?

They describe the same K-26 stage position on the machine. The 2989015900 is the reference in the documentation of installed GA machines, and current orders are directed to the element 2989020800.

Which compressors use the 2989015900 stage?

The confirmed list covers the GA 30, GA 37, GA 45 and GA 55 C. All are fixed-speed oil-injected screw machines built around the same K-26 stage.

How big and how heavy is the 2989015900?

The item data lists 55 × 50 × 45 cm and 120.00 kg. These figures describe the serviced stage as packed, so lifting gear and a clear floor route belong on the delivery-day checklist.

How do I order a renewal for my GA 45?

Read the code on the old element tag and note the compressor model and serial, then send both to Seadweer. The fitment check matches the 2989015900 in your machine file to the current element 2989020800, and the order is confirmed with the records kept in line.

What are the signs that the stage needs renewal?

Possible signs can include rising specific energy, drifting discharge pressure, unusual noise or vibration, higher oil temperature and metal traces in the oil sample. Any of these trends is a reason to inspect the element and plan the renewal.

Can one spare-part position cover all four machines?

Yes. The GA 30, GA 37, GA 45 and GA 55 C share the same K-26 stage, so the maintenance system carries one stage identity for the group, ordered under the current element number.

More Air Ends Available

Other Atlas Copco air end models are available upon request. Please check the table below or contact us for details.