Atlas Copco Oil Stop Check Valve Kit 2901021704

The Atlas Copco Oil Stop Check Valve Kit 2901021704 is a specialized service component for applicable oil-injected screw compressor systems. Atlas Copco identifies this part as Oil Stop/Check Valve Kit C111 and lists it under service kits for oil-injected screw compressors. The kit brings together valve, spring, sealing and related components required for servicing the oil stop/check valve assembly.

A properly functioning oil-control valve helps the compressor maintain the intended oil-flow path during operation and shutdown conditions. Using the correct service kit can help maintenance teams restore the valve assembly without replacing unrelated compressor components.

Maintain Proper Oil Control

Oil plays a critical role in an oil-injected screw compressor. The lubrication circuit supplies oil for functions such as lubrication, cooling and sealing.

The oil stop/check valve assembly helps control the movement of oil within the compressor circuit. When the valve operates correctly, the system can maintain the intended oil-flow direction and reduce unwanted reverse flow.

The 2901021704 Oil Stop Check Valve Kit provides the service components needed for the applicable C111 valve assembly.

Support Reliable Compressor Operation

Compressor reliability depends on many individual components working together correctly. A worn valve, damaged spring or deteriorated seal can affect the operation of a valve assembly.

Replacing the relevant service components can help restore proper valve function and support dependable compressor operation.

Atlas Copco describes the 2901021704 kit as an Oil Stop/Check Valve Kit C111 for oil-injected screw compressors and states that the kit is intended to help keep equipment running smoothly and efficiently while supporting extended service intervals.

Service the Valve Assembly With the Correct Components

The 2901021704 kit contains multiple components rather than a single valve alone. Atlas Copco’s product information lists a spring check valve, plug, check valve C111-C106, oil stop valve spring, multiple O-rings, gasket, oil stop valve and sealing components.

This combination allows technicians to service the relevant valve assembly with a coordinated set of components.

Using a complete service kit can also simplify parts identification during planned compressor maintenance.

Protect the Oil Circuit

The compressor oil circuit must maintain the correct flow path to support stable operation. A properly functioning oil stop/check valve helps control oil movement and limits unwanted reverse flow.

If the valve assembly develops wear or sealing problems, the compressor may experience changes in oil behavior. Maintenance personnel should therefore inspect the valve assembly whenever service procedures, operating symptoms or manufacturer recommendations indicate that inspection is required.

The 2901021704 kit provides the components required for servicing the documented C111 oil stop/check valve assembly.

Use the Kit During Planned Maintenance

Preventive maintenance helps identify worn components before they create larger equipment problems. Technicians can inspect valve components, springs, O-rings, gaskets and sealing surfaces during applicable service work.

Replace damaged or worn components according to the compressor manufacturer’s maintenance instructions.

Do not rely on a generic replacement interval for every compressor. Operating hours, compressor configuration, environment, oil condition and manufacturer maintenance recommendations can all influence service requirements.

Replace Worn Seals and O-Rings

Sealing components play an important role in valve assemblies. The Atlas Copco 2901021704 kit includes several O-rings and sealing components, including O-rings listed as 59.5 × 3 mm, 19.2 × 3 mm and 32.2 × 3 mm, along with a gasket and seal washer.

During maintenance, technicians should inspect sealing surfaces and replace damaged seals rather than reinstalling components that show deterioration.

Proper installation also matters. Follow the applicable compressor service instructions for cleaning, assembly and tightening procedures.

Maintain Correct Valve Function

A check valve allows flow in the intended direction while limiting reverse flow. An oil stop function helps control oil movement within the compressor circuit.

When these functions work correctly, they contribute to stable oil management within the compressor.

The 2901021704 kit combines oil-stop and check-valve components in one service package for the documented C111 application.

Choose the Correct Compressor Spare Part

Part-number accuracy matters when purchasing compressor service components. Atlas Copco lists 2901021704 as the Oil Stop/Check Valve Kit C111, while parts catalogs also show the formatted number 2901 0217 04.

Do not select a valve kit based only on appearance. Different compressor configurations can use different valve assemblies and service kits.

Before purchasing, compare:

• Part number
• Compressor model
• Compressor configuration
• Serial number
• Existing valve assembly
• Manufacturer service documentation

This verification helps reduce the risk of ordering an incorrect compressor spare part.

Support Compressor Maintenance

A reliable maintenance program depends on using the correct replacement components at the appropriate service stage. The Atlas Copco Oil Stop Check Valve Kit 2901021704 provides a coordinated group of components for servicing the documented C111 oil stop/check valve assembly.

The kit can help maintenance teams address worn valve and sealing components while keeping the service process organized.

For industrial compressor operators, correct valve maintenance can contribute to reliable oil management and consistent compressor operation.

Buy Atlas Copco Oil Stop Check Valve Kit 2901021704

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If you are looking for Atlas Copco Oil Stop Check Valve Kit 2901021704, confirm the part number against your compressor model and serial number before ordering.