Description
The 1616734591 is the service number of the O.I.S. O-05, the oil-injected screw element of the C190 platform, and it pairs with the production number 1616734581. Its documented coverage is wide: the GA 132, GA 160, GA 200 and GA 250 stationary compressors, the G 132, G 160, G 200 and G 250 units of the G range, and the GA 110, GA 132 and GA 160 VSD machines — the full spread the 1616734591 generation was built for.
The item record now carries the replaced marking, and the successor stage 1616 7345 82 stands behind it in the Atlas Copco chain, with service orders routed to 1616 7345 92. That history is part of what a buyer needs: machines still running this platform were documented under the 1616734591 and its neighbours, and the parts records tie every generation of the chain together.
This article sets out what the O-05 designation covers, how the three-generation chain reads, which machines the official records name for the 1616734591, and how an order placed today reaches the stage now in supply.

Identity of the 1616734591 Element
An element is the core compression stage of a screw compressor, and the 1616734591 fills that role for the machines of the C190 platform. It converts shaft power into air flow at pressure, and it is a long-life factory assembly: the rotor pair, the housing and the bearings are built as one and renewed as one.
The C190 tag is the platform code that ties the element to the air-end sections of the GA and G parts lists alike, and the O-05 code is the element designation the item record carries for the 1616734591. Both markings travel with the number through the documentation, and either one on an enquiry helps the parts desk place the stage immediately.
What the O.I.S. O-05 Designation Covers
O.I.S. is the oil-injected screw designation, and O-05 is the element code the item record carries for this stage. The record names it O.I.S. O-05 (C190), which places the stage inside the C190 platform in the same entry.
Atlas Copco prints the number in two forms. The ten-digit form 1616734591 is what the service record carries, and 1616 7345 91 is the printed form; the production side carries 1616734581, printed as 1616 7345 81. All of them name the same stage, and the parts lists quote whichever form the document was written around.
The Production Number and the Service Number
The two numbers of this stage describe two sides of the same unit, in the same structure the platform uses across its generations. 1616734581 is the production number, the reference stamped against the build and the one the factory documentation tracks; 1616734591 is the service number, the reference the service records are written against.
A machine file can carry either one depending on which document it quotes, and Seadweer confirms the pairing against the parts records when an enquiry is handled, so a fitter reading one number and a planner quoting the other always land on the same stage.
The Supersession Record of the C190 Element
The C190 element line evolved through three generations, and the item records connect them explicitly. The chain reads 1616734580, then 1616734581, then 1616734582, and each step is an Atlas Copco replacement decision recorded in the item data rather than a dealer inference — the documented history of the 1616734591 generation.
| Generation | Production number | Service number | Status in the record |
| First | 1616734580 | — | Replaced by 1616734581 |
| Second | 1616734581 | 1616734591 | Replaced; service orders route to 1616 7345 92 |
| Third | 1616734582 | 1616734592 | Current successor generation |
From 1616734580 to 1616734581
The item record for the 1616734591 generation is explicit about where it came from: 1616734580 is marked replaced by 1616734581, with the new generation taking effect from March 2012. The record carries the note replaced for tested element, which ties the change to the tested-element programme rather than to an unexplained renumbering.
That linkage matters in practice, because machines documented under the first generation draw from the same C190 stage position. Where an official parts list names 1616 7345 80 for a machine, the replacement record carries that machine’s application forward to the 81 generation, and the parts records tie the two references together.
The Successor and the Current Service Route
The chain continues forward in the same way: from March 2016 the record carries 1616734582 as the successor generation, and the documentation adds a standing instruction with it — please order service stage 1616 7345 92. That instruction is the official note in the item data, and it decides where a service order placed today is routed.
The structure protects the order itself. A machine whose file quotes 1616734591 or 1616734581 is identified against the C190 stage position, and the supply goes through the generation now in service. Nothing in that chain depends on reading a worn plate twice, and the history stays traceable: every generation keeps its own number, its own record and its own place in the documented coverage of the platform.

Machines Documented for the 1616734591
Atlas Copco’s official parts lists, components lists and the replacement record name the O-05 stage across the GA and G ranges in three groups, collected in the table below and taken in turn afterwards.
| Group | Documented units | Evidence |
| VSD machines | GA 110 VSD, GA 132 VSD, GA 160 VSD | Parts lists list 1616 7345 81 directly |
| 200-250 frames | GA 200, GA 250, G 200, G 250 | Components lists list 1616 7345 81 directly |
| Inherited through the replacement record | GA 132, GA 160, G 132, G 160 | Parts lists list 1616 7345 80; the record replaces it with 1616734581 |
The VSD Records
The VSD documentation names this element in its own parts lists. The record covering the GA 110 VSD, GA 132 VSD and GA 160 VSD lists 1616 7345 81 as the service stage in the element and connections section, and the listing appears for both the air-cooled and the water-cooled configurations of those machines. The GA 132 VSD carries an additional parts list of its own with the same listing, so the frame is documented twice over for the 1616734591 generation.
A variable-speed drive changes how the machine modulates, and the element underneath stays the O-05 position of the C190 platform. Because the listing is quoted from the VSD parts lists themselves, the three VSD machines rest on the same direct evidence for the 1616734591 as the fixed-speed frames, not on an extension from them.
The 200-250 Frames
The larger frames of the platform are documented from the components side. The Atlas Copco components lists for the GA 200-250 and the G 200-250 projects name the C190 compressor element and list 1616 7345 81 as the oil-injected screw element for those machines — the 81 generation itself, quoted directly rather than reached through a later record.
That is worth stating plainly: the GA 200, GA 250, G 200 and G 250 evidence does not borrow from the successor generation. The components lists name the same number behind the 1616734591 service record, which makes the four large frames the most directly documented positions of this element.
The Inherited Records: G132, G160, GA132, GA160
The parts lists for the mid-size frames were written around the first generation. The G range documentation carries a C190 element section that lists 1616 7345 80 as the service stage for the G 132 and the G 160 across their pressure builds, and the GA documentation lists the same number for the GA 132 at 7.5, 8.5 and 10 bar and for the GA 160.
The replacement record then does the connecting: 1616734580 is marked replaced by 1616734581, so the machines those lists documented pass to the 1616734591 generation with their configurations intact. The inheritance follows the official record, machine by machine and pressure build by pressure build, and it stops where the record stops.
Where the Documented Range Ends
The documented coverage has two edges, and both are fixed by the records themselves. The first edge is the G 110: its own parts documentation names a different element for that frame, from the C146 platform, so the G 110 stays outside the C190 coverage even though the model sits next to the G 132 and G 160 in the range.
The second edge is generational: the successor 82 generation carries its own record, and the machines documented under it are not read backwards into the 1616734591 coverage. Application follows the parts record for each machine and each generation, which is the same rule that carried the 80 generation’s machines forward, applied in the other direction.

Replaced Status and Ordering Today
The item record for the 1616734591 generation carries the replaced marking, and that status shapes how an enquiry is handled rather than blocking it. The machines documented for this element are still identified under its numbers, and the supply path runs through the generation the records point to.
What the Replaced Marking Means
Replaced in the item record means the generation has a documented successor, not that the stage position has disappeared. The note replaced for tested element ties the change to the tested-element programme, and the successor generation continues the same C190 stage position with its own production and service numbers.
For a buyer, the practical reading is simple: the 1616734591 or the number on the old element is still the right starting point, and the parts records take the enquiry from that number to the stage in supply. The history and the current route are two halves of one chain, and both are documented.
Ordering Against the Current Service Stage
The standing instruction in the item data routes service orders to 1616 7345 92, the service stage of the successor generation. An enquiry that quotes 1616734591, 1616734581 or even the first-generation number is read against the machine record and handled through that route in one pass, which is what the replaced status of the 1616734591 is for.
Plants that run several C190 machines keep a short record for each unit: model, serial number and element number. That record turns the next enquiry into a single message with a confirmed answer, and it is the same record the parts desk works from when a 1616734591 renewal is quoted.
Confirming the Match for Your Machine
Two pieces of information lock the order down: the number on the element being renewed — whether it reads 1616734591, the production number 1616734581 or an older reference — and the model and serial number from the compressor nameplate.
What to Send
Send both to Seadweer and the parts desk checks the number against the machine record and confirms the stage in one pass. Where the number on the old element has worn away, the nameplate is enough on its own, because the parts list for the machine names the element it was built with.
The confirmation for a 1616734591 enquiry names the generation the machine is documented under and the stage the order is routed to, so the workshop and the buyer see the same answer. That is the whole of the identification work for a C190 renewal.
What the Quotation Confirms
The quotation repeats the item data tied to the enquiry: the O.I.S. O-05 (C190) designation, the country of origin and the routing of the order to the current service stage. One confirmation covers the whole renewal, so the planned stop and the parts arrival for the 1616734591 renewal are arranged against a single answer.
Send the machine details with the enquiry and the answer comes back with the fitment already checked. That is the whole of the ordering process for a 1616734591 renewal.

Technical Specifications
The table below collects the identification data recorded for the 1616734591 and its chain.
Part Identification
| Item number | 1616734591 |
| Designation | O.I.S. O-05 (C190) |
| Printed form | 1616 7345 91 |
| Production number | 1616734581 (1616 7345 81) |
| Replaces | 1616734580 (1616 7345 80) |
| Successor generation | 1616734582; service orders route to 1616 7345 92 |
| Stage platform | C190 |
| Compression type | Oil-injected rotary screw |
| Country of origin | Belgium |
| Customs tariff code | 8414900090 |
Dimensions and Weight
| Dimensions (L × W × H) | 79 × 58 × 58 cm |
| Weight | 400.00 kg |
The 400.00 kg weight and the 79 × 58 × 58 cm envelope describe the C190 element as it is supplied, and they set the handling plan for the fitting day: a planned lift with a crane rated for the mass, the unit carried on its mounting faces and never on a shaft end. Seadweer confirms the current package details with the quotation.

FAQ
What is the 1616734591?
The 1616734591 is the service number of the O.I.S. O-05 (C190) element, the oil-injected screw stage of the C190 platform, documented for the GA 132, GA 160, GA 200 and GA 250, the G 132, G 160, G 200 and G 250, and the GA 110, GA 132 and GA 160 VSD. It is a complete factory assembly renewed as a unit.
What is the difference between 1616734591 and 1616734581?
They name one and the same stage. 1616734581 is the production number, and the 1616734591 is the service number the service records are written against. A machine file can carry either one depending on which document it quotes.
What is the difference between 1616734591 and 1616734592?
They are two generations of the same C190 stage position. The 1616734591 belongs to the 81 generation, which the record marks replaced, and 1616734592 is the service stage of the successor generation that current orders route to. Each generation keeps its own documented coverage.
Which compressors take this element?
The documented coverage is the GA 132, GA 160, GA 200 and GA 250, the G 132, G 160, G 200 and G 250, and the GA 110, GA 132 and GA 160 VSD. The VSD machines and the 200-250 frames are listed directly in the official records, and the mid-size frames pass from 1616734580 through the replacement record. Fitment for a specific machine is confirmed from its serial number record.
Does the G 110 use this element?
No. The G 110 parts documentation names an element from the C146 platform for that frame, so it sits outside the 1616734591 coverage. The same applies in reverse to any machine documented only under the successor generation.
How do I order a renewal for my compressor?
Read the number on the element being renewed and note the model and serial number from the compressor nameplate. Send both to Seadweer and the fitment is confirmed against the parts record for that machine, with the order routed to the service stage now in supply.
More Atlas Copco Parts List
For other Atlas Copco air compressor parts, please refer to the table below, where more models are listed. Feel free to contact us with your requirement.
| Part Number | Part Name | Part-Number |
|---|---|---|
| 1616734592 | ELEMENT COMPR. | 1616-7345-92 |
| 1616738290 | ELEMENT C80 I-01 | 1616-7382-90 |
| 1616738791 | SPARE ELEMENT AQ15-30VSD | 1616-7387-91 |
| 1616740891 | ELEMENT | 1616-7408-91 |
| 1616728190 | O.I.S. K-36 | 1616-7281-90 |
| 1310196360 | CONNECTIONS-GAUGE | 1310-1963-60 |
| 1900314750 | CONTROL PANEL-FILME COMPRESSOR | 1900-3147-50 |
| 3001531169 | 16000H KIT PE3390 S | 3001-5311-69 |
| 1903603907 | PIPE(S.S(M/S TO CYL.140 DIA.) | 1903-6039-07 |
| 8101030396 | LC 90 21B GALVA OUTP.CV/UV | 8101-0303-96 |
| 1613740080 | FILTER-AIR ASY | 1613-7400-80 |
| 0333423200 | LOCK WASHER | 0333-4232-00 |
| 1302303480 | PISTON-COMPRESSOR | 1302-3034-80 |
| 2205190463 | PIPE-FILME COMPRESSOR | 2205-1904-63 |
| 1622220503 | COMPENSATOR | 1622-2205-03 |
| 1624625038 | HEADLESS BUTTERFLY VALVE 2 | 1624-6250-38 |
| 1630990301 | USB FLASH DRIVE | 1630-9903-01 |
| 1092160608 | DECAL | 1092-1606-08 |
| 1624640806 | SOLENOID PLATE 400M-4 | 1624-6408-06 |
| 1310251062 | KIT | 1310-2510-62 |
| 6996012588 | HOSE, 1 1/2+, 1003.5MM | 6996-0125-88 |
| 1621505535 | PULLEY | 1621-5055-35 |
| 1900223063 | CUBICLE GA 15VSD+ | 1900-2230-63 |
| 1901012639 | Socket plug | 1901-0126-39 |
| 1627647600 | HEATER COOLANT | 1627-6476-00 |
| 1616656400 | GEAR WHEEL BULL | 1616-6564-00 |
| 1089953703 | CLIP | 1089-9537-03 |
| 1622951301 | CHECK VALVE | 1622-9513-01 |
| 1606368001 | EARTHING BOSS | 1606-3680-01 |
| 1624206900 | RIGHT SIDE PANEL FD3 | 1624-2069-00 |
| 1624131833 | NOZZLE SIZE NO. 33 | 1624-1318-33 |
| 2002069500 | PIPE | 2002-0695-00 |
| 2202260891 | TERMOMETRO CAMPO VER | 2202-2608-91 |
| 1630089006 | PLATE LOCK | 1630-0890-06 |
| 1624229404 | COMPRESSOR | 1624-2294-04 |
| 1089922802 | CIRCUIT BREAKER | 1089-9228-02 |
| 2253739800 | SPACER | 2253-7398-00 |
| 1624625902 | VALVE DN100 S40 CS | 1624-6259-02 |
| 2205490583 | MINI. PRESSURE VALVE | 2205-4905-83 |
| 1624634882 | FILTER ELEMENT C-25-10/G2 | 1624-6348-82 |
| 1624649001 | SERVICE KIT ELEMENT G2 | 1624-6490-01 |
| 1089953760 | POWER RELAY K1 | 1089-9537-60 |
| 1089960427 | CIRCUIT BREAK. | 1089-9604-27 |
| 1635449580 | SUPPORT | 1635-4495-80 |
| 1092100243 | HOSE ASSEMBLY | 1092-1002-43 |
| 1625119427 | POWER CABLE | 1625-1194-27 |
| 1901072814 | VALVE UNLOADER | 1901-0728-14 |
| 1504220074 | PISTON ASSEMBLY | 1504-2200-74 |
| 2203011600 | DECAL PULLEY GUARD | 2203-0116-00 |
| 2202804601 | REFRIGERANT COMP.TAG4553Z | 2202-8046-01 |
















Musa Osei –
Our file for a GA 160 VSD still carried the old element number, and we were not sure what it would map to today. Seadweer traced the chain, named the frames the number was documented for, and routed the order to the stage now in supply without a second enquiry. The whole exchange took one message. That is exactly what we need when a machine of this age comes in for a major overhaul.