Atlas Copco Oil Stop Valve Kit Replacement – 2906009400

Atlas Copco 2906009400 – Oil Stop Valve Kit

The Atlas Copco 2906009400 (2906-0094-00) Oil Stop Valve Kit is a service and replacement kit used in the oil circuit of Atlas Copco screw compressors. The oil stop valve helps control the movement of compressor oil and prevents unwanted oil flow when the compressor is unloaded or stopped.

Working Process:
During normal compressor operation, the oil circuit supplies the required quantity of oil to the compressor element and associated components for lubrication, cooling, sealing, and efficient operation. The oil stop valve operates according to the pressure conditions within the compressor’s oil circuit.

When the compressor is running under normal loaded conditions, the valve permits the required oil flow through the lubrication circuit. This ensures that the compressor element and other oil-dependent components receive sufficient oil during operation.

When the compressor unloads or stops, the pressure conditions in the oil circuit change. The oil stop valve closes or restricts the oil passage, helping prevent excessive oil from continuing to flow into areas where it is not required. This reduces unwanted oil migration and helps prevent oil accumulation in the compressor system during shutdown.

The valve therefore performs an important protective function during compressor stopping and starting sequences. By controlling oil movement according to operating pressure, it helps maintain the correct oil balance within the compressor and supports reliable restarting.

The 2906009400 service kit is used when the oil stop valve requires maintenance or when its internal sealing or operating components have become worn. The kit restores the valve’s ability to open, close, and seal correctly.

If the oil stop valve becomes worn, contaminated, or fails to seal properly, oil may continue to pass through the circuit when the compressor is stopped. This can lead to excessive oil carryover, oil accumulation, difficult starting conditions, increased oil consumption, or other compressor operating problems.

During maintenance, the compressor should be isolated and depressurized before the valve is serviced. The worn service components are removed, the valve and mating surfaces are inspected and cleaned, and the replacement components from the 2906009400 kit are installed correctly. After assembly, the oil circuit should be checked for leakage and correct valve operation.

Part Number: 2906009400
Alternative Number: 2906-0094-00 / 2906 0094 00
Part Description: Oil Stop Valve Kit / Oil Check Valve Kit
Brand: Atlas Copco
Component Type: Oil circuit control valve service kit
Primary Function: Controls and restricts oil flow during compressor operation and shutdown
Typical Application: Atlas Copco screw compressors
Main Benefit: Helps prevent unwanted oil flow, oil migration, and oil accumulation during shutdown while maintaining proper lubrication during operation.

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