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Atlas Copco OIS O-01 1616725691=1616725681 (1)

Atlas Copco OIS O-01 1616725691=1616725681 (2)

Atlas Copco OIS O-01 1616725691=1616725681 (3)

Atlas Copco OIS O-01 1616725691=1616725681 (4)

Atlas Copco OIS O-01 1616725691=1616725681 (5)

Atlas Copco OIS O-01 1616725691=1616725681 (6)

Atlas Copco OIS O-01 1616725691=1616725681 (7)

Atlas Copco 1616725691 OIS O-01 Air End (Oil-Injected Screw Compressor Element)

The 1616725691 Atlas Copco OIS O-01 air end is the C168 oil-injected screw element for GA-series compressors. Built in Belgium with the SAP rotor profile, it restores original output. Send your nameplate and we will confirm the exact fit before you order.

Product name:

OIS O-01

Part Number:

1616725691

Suitable for:

Oil-Injected Screw Compressor

Country of Origin:

Product quality:

100% ORIGINIAL

Brand:

Atlas Copco

Price:

Negotiable

Delivery time:

8-15 Days

Minimum order quantity:

1 PCE

Packing:

Wooden Box / Carton

Transaction mode:

EXW/FOB/CIF/CFR

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1616725691 OIS O-01

Product Description

The 1616725691 is the service number for the Atlas Copco OIS O-01 air end, the compression element at the heart of a screw compressor. The number 1616725681 is the production listing for the same element, so both identify this part. Built in Belgium as the C168 airend, it serves the GA-series oil-injected screw compressors.

About the 1616725691 Air End

The OIS O-01 is an oil-injected screw air end, often called the airend. It holds the male and female rotors that actually compress the air. Injected oil seals the tight clearances, carries away heat, and lubricates the bearings. Atlas Copco groups this design as the C168 airend. The same airend fits the GA90, GA110, GA132, GA160, GA180VSD, GA200 and GA250 models.

Inside, the rotors use the SAP (Screw Atlas Profile) geometry with a 4/6 tooth combination and equal rotor diameters. That layout gives the female rotor more stiffness than a 5/6 or 4/5 tooth set. It holds its shape under load and leaks less at the seal line. The result is a higher internal pressure ratio near 10 bar and better efficiency at the common 10 and 13 bar settings.

Sealing relies on a reverse-thread oil seal paired with a stainless steel air seal. The two keep a close gap to the shaft without touching it, which is why the element stays efficient through thousands of running hours. A small leakage path between the seals vents safely if a seal is ever damaged.

Product Specifications

Attribute	Value
Part name	O.I.S. O-01 air end
Service number	1616725691
Production number	1616725681
Brand	Atlas Copco
Type	Oil-injected screw element
Series	C168 airend
Origin	Belgium (BE)
Tariff code	8414900090
Dimensions (L x W x H)	86 x 62 x 58 cm
Weight	360 kg
Rate group	S3K

Oil-Injected Screw Compressor Element

Fitting and Care for the 1616725691

Atlas Copco 1616725691 OIS O-01 Air End (Oil-Injected Screw Compressor Element) 11

A worn airend shows up as lower delivered air volume, higher discharge temperature, and rising vibration or noise at steady load. Power draw climbs as the rotors slip efficiency. Any of these signs points to internal wear that a fresh element resolves.

Atlas Copco 1616725691 OIS O-01 Air End (Oil-Injected Screw Compressor Element) 12

Fit the genuine 1616725691 to keep the original dimensions the package was built around. The bracket, couplings, and oil ports then line up without modification. Match the element to the exact GA model through the nameplate and serial number before fitment.

Atlas Copco 1616725691 OIS O-01 Air End (Oil-Injected Screw Compressor Element) 13

Keep the new airend indoors with the shaft ports sealed until install, because dirt in the chamber scores the rotors on first start. After the first run, re-check the coupling bolts at the interval the manual states, since early running hours can settle them. Change the compressor lubricant on the stated schedule to protect the bearings.

Atlas Copco 1616725691 OIS O-01 Air End (Oil-Injected Screw Compressor Element) 14

Atlas Copco sets a service interval for the element based on running hours. The rotors and shaft seals wear at a known rate over time. Replacing the stage at that interval brings the compressor back to its designed output. It also avoids the unplanned stops a failed element causes in the plant.

FAQ

What does the 1616725691 air end do?

It is the compression stage of an oil-injected screw compressor. The rotors inside raise air pressure while injected oil seals the clearance and removes heat, so the element sets the machine's output and efficiency.

Is 1616725681 the same as 1616725691?

Both numbers identify the same OIS O-01 air end. The number 1616725681 is the production listing, and 1616725691 is the service number used when the part is supplied. Either way you receive this C168 airend.

Which compressors use the OIS O-01 airend?

It is the C168 airend fitted across the GA-series oil-injected screw compressors, from the GA90 through the GA250. The nameplate and serial number confirm the exact match for your machine.

How do I confirm this air end fits my compressor?

The nameplate and serial number on your compressor fix the correct element. Send them to us and we will confirm the match before you place the order, so the flanges and couplings line up on arrival.

What are the signs of a worn airend?

Watch for lower delivered air volume, higher discharge temperature, rising vibration or noise, and a slow climb in power draw. Any of these points to internal wear that a new 1616725691 restores.

Should I clean or replace a failing airend?

External fin fouling clears with a proper clean, and that is the first step. Internal rotor wear or a scored chamber will not, and those need a new 1616725691 to bring the compressor back to its designed output.

More Parts List

If you need other Atlas Copco air compressor parts, we provide more models in the table below or you can submit your requirements to us directly.

Part Number	Part Name	Part-Number
1310406400	ALTERNATOR	1310-4064-00
1310457000	ALTERNATOR	1310-4570-00
1310485200	ALTERNATOR	1310-4852-00
1604142480	ALTERNATOR ASSY	1604-1424-80
1604146681	ALTERNATOR ASY	1604-1466-81
1604146682	ALTERNATOR ASY	1604-1466-82
1604146782	ALTERNATOR ASY	1604-1467-82
1604149882	ALTERNATOR ASY	1604-1498-82
1604149982	ALTERNATOR ASY	1604-1499-82
1604150081	ALTERNATOR ASSY	1604-1500-81
1604201600	SUPPORT-ALTERNATOR	1604-2016-00
1604816980	ALTERNATOR ASSY	1604-8169-80
1615875880	ALTERNATOR ASY	1615-8758-80
1615875981	ALTERNATOR ASY	1615-8759-81
1615875982	ALTERNATOR ASY	1615-8759-82
1615875986	ALTERNATOR ASY	1615-8759-86
1615927180	ALTERNATOR ASY	1615-9271-80
1615927181	ALTERNATOR ASY	1615-9271-81
1615927283	ALTERNATOR ASY	1615-9272-83
1615927482	ALTERNATOR ASY	1615-9274-82
1615952682	ALTERNATOR ASY	1615-9526-82
1626062200	ALTERNATOR	1626-0622-00
1626065480	ALTERNATOR A	1626-0654-80
1626172700	ALTERNATOR	1626-1727-00
2914809500	ALTERNATOR	2914-8095-00
2205132415	DRIVER PULLEY	2205-1324-15
2205132416	DRIVE PULLEY	2205-1324-16
2205132418	DRIVE PULLEY	2205-1324-18
2205132422	DRIVE PULLEY	2205-1324-22
2205132423	DRIVE PULLEY	2205-1324-23
2205132424	DRIVE PULLEY	2205-1324-24
2205132425	DRIVE PULLEY	2205-1324-25
2205132426	DRIVE PULLEY HP75/kW55-1060Hz	2205-1324-26
2205132427	DRIVER PULLEY SHAFT D60	2205-1324-27
2205132428	DRIVER PULLEY SHAFT D65	2205-1324-28
2205132429	DRIVE PULLEY	2205-1324-29
2205132430	DRIVE PULLEY	2205-1324-30
2205132431	DRIVE PULLEY	2205-1324-31
2205132432	DRIVER PULLEY SHAFT	2205-1324-32
2205132433	DRIVER PULLEY SHAFT	2205-1324-33
2205132436	DRIVE PULLEY	2205-1324-36
2205132441	DRIVEN PULLEY	2205-1324-41
2205132442	DRIVEN PULLEY	2205-1324-42
1616718763	ELEMENT	1616-7187-63
1616724099	ELEMENT ZB 100-110 - REFUR.	1616-7240-99
1616724599	ELEMENT ZB160 REFURBISHED	1616-7245-99
1616725790	OIS-N-01 SERVICE ELEMENT	1616-7257-90
1616725791	OIS-N-02 SERVICE ELEMENT	1616-7257-91
1616727181	ELEMENT HP T2	1616-7271-81
1616727581	ELEMENT LP T3	1616-7275-81

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