Atlas Copco 2901140431 OSC DIBT 600 Kit B for OSC600 Oil-Water Separator Maintenance

Product Overview

The Role of Condensate Treatment in Compressed Air Systems

Every lubricated screw compressor produces condensate during operation. Atmospheric moisture entrained in the intake air condenses under compression. This condensate picks up oil traces as it passes through the compressor lubrication circuit. The resulting oil-water emulsion flows into the drainage system. Without proper treatment, it poses a serious environmental compliance risk.

The Atlas Copco OSC600 oil-water separator handles this condensate stream. It reduces residual oil content to legally dischargeable levels, allowing the treated water to enter standard drainage. The 2901140431 Kit B is the factory-specified maintenance kit that restores this separator to peak performance at scheduled service intervals.

What the 2901140431 Kit B Contains

The 2901140431 is designated as OSC DIBT 600 Kit B for air treatment equipment by Atlas Copco. It is the comprehensive replacement consumables package for one OSC600 unit service. The kit includes the following components:

Atlas Copco supplies this kit as a single part number to simplify maintenance procurement. The technician receives all required consumable components in one package. There is no need to cross-reference individual filter part numbers or to order mufflers and foam pads separately.

Technical Specifications

Kit Physical Parameters

OSC600 Oil-Water Separator Overview

Understanding the OSC600 unit context helps explain what the 2901140431 Kit B maintains. The OSC600 is an oil-water separator rated for compressors with total flow rates up to 36,000 litres per minute. It features two 3/4-inch internal thread condensate inlets and a 3/4-inch internal thread treated water outlet. The unit measures 750 mm in length, 546 mm in width, and 1,030 mm in height, weighing approximately 26 kg.

Multiple OSC600 units serve installations with higher condensate volumes. The separator meets DIBT (Deutsches Institut fuer Bautechnik) certification standards for condensate treatment equipment. DIBT approval confirms that the treated water from this separator meets regulatory oil content limits. It can then discharge safely into public sewer systems.

How the OSC600 Oil-Water Separator Works

Two-Stage Separation Process

The OSC600 uses a proven two-stage separation method. In the first stage, condensate enters the separator housing and flows through the distribution zone. The top foam pads from the Kit B sit in this zone. They reduce splash and disperse the incoming condensate evenly across the filter media below. This even distribution is critical. Uneven flow channels create short-circuit paths where untreated condensate bypasses the filter material.

Gravitational separation occurs as the condensate passes through the primary filter stage. Oleophilic (oil-attracting) filter media capture oil droplets as they float upward. Cleaner water continues downward through the filter bed. The partially treated water then enters the second stage. Here, an activated carbon cartridge captures the remaining dissolved and emulsified oil traces. The activated carbon’s porous structure adsorbs oil molecules at a microscopic level, producing water with residual oil content below the DIBT regulatory threshold.

The Role of Each Kit Component in the System

Each component in the 2901140431 kit addresses a specific wear or saturation mechanism. The filter cartridges in the OSC 600 Kit B core have a finite oil adsorption capacity. Once the carbon pores become saturated, breakthrough occurs. Oil begins passing through the second stage into the outlet. Replacing the cartridges before saturation point prevents this compliance failure.

The top foam pads degrade through prolonged exposure to warm condensate and airborne oil mist. Compressed foam loses its splash-baffle geometry and no longer distributes flow evenly. The mufflers collect dust and oil residue from the vent ports over thousands of operating hours. Clogged mufflers restrict vent airflow and alter the pressure balance inside the separator housing. Replacing all four mufflers restores the designed venting characteristics.

Maintenance and Replacement Timing

8,000-Hour Service Protocol

Atlas Copco specifies a maximum service interval of 8,000 operating hours for the OSC600 separator consumables. This interval serves as the upper threshold. Applications with high condensate loads, high ambient temperatures, or compressors running synthetic lubricants may require more frequent filter changes. Maintenance planners should evaluate the actual condensate volume and oil carryover rate. These factors determine whether an earlier replacement schedule is prudent.

The 2901140431 Kit B replacement procedure is designed for straightforward field execution. The technician opens the separator housing access cover. Used filter cartridges lift out as complete units. Worn foam pads lift off the distribution plate. Old mufflers unscrew from the vent ports. New components from the kit drop into their respective positions. The access cover closes and the separator returns to service. No special tools or calibration equipment are required.

Signs That Replacement Is Overdue

Several indicators suggest the OSC600 filter media have reached the end of their service life:

• Oil sheen on treated water: A visible oil film on the separator outlet water indicates carbon cartridge saturation. The activated carbon can no longer adsorb residual oil.
• Slow drainage or backflow: Clogged filter media increase resistance to condensate flow. Condensate backs up in the inlet piping.
• Increased separator operating noise: Blocked mufflers change the acoustic profile of the vent ports. A louder or higher-pitched sound during discharge suggests muffler replacement.
• Visible filter media discoloration: During periodic inspection, filter cartridges that appear dark brown or black with oil saturation are approaching their service limit.
• Water pooling around the separator base: Degraded top foam allows splash to reach the housing seal. Moisture traces around the base indicate foam replacement is needed.

Frequently Asked Questions

What is the Atlas Copco 2901140431 used for?

The 2901140431 is the OSC DIBT 600 Kit B. It is the factory maintenance service kit for the Atlas Copco OSC600 oil-water separator. The kit contains replacement filter cartridges, top foam pads, and mufflers. It restores the separator to its rated condensate treatment performance at the 8,000-hour service interval.

What does DIBT mean in the product name?

DIBT stands for Deutsches Institut fuer Bautechnik, the German Institute for Building Technology. The DIBT certification confirms that the OSC600 separator meets German regulatory standards for condensate treatment. Treated water from a DIBT-certified separator can be discharged into the public sewer system in compliance with environmental regulations.

What compressors use the OSC600 oil-water separator?

The OSC600 is compatible with Atlas Copco lubricated screw compressors with total flow rates up to 36,000 litres per minute. It typically serves medium to large installations such as GA 30 to GA 90 series compressors and equivalent fixed-speed or VSD models. Confirm compatibility using your compressor serial number and the Atlas Copco parts catalog before ordering the 2901140431 kit.

What is included in the Kit B versus a Kit A?

The 2901140431 Kit B is the comprehensive maintenance kit that includes the OSC 600 Kit B filter cartridge set, two TOP FOAM SIZE-3 pads, and four mufflers. A Kit A (part number 2901140401) typically contains only the filter cartridge elements. Users performing full separator service including vent and distribution maintenance should use Kit B.

How does the two-stage separation process work?

The first stage uses oleophilic filter media for gravitational separation. Oil droplets attach to the filter fibres as condensate flows through the media bed. The second stage passes the partially treated water through an activated carbon cartridge. The carbon’s porous structure adsorbs dissolved and emulsified oil molecules at a microscopic level. This two-stage process reduces residual oil content to levels compliant with environmental discharge regulations.

Can the filter cartridges be cleaned or regenerated?

No. The activated carbon and oleophilic filter media in the OSC600 are single-use consumables. Oil-saturated carbon cannot be regenerated in the field. Reconditioning attempts would not restore the adsorption capacity and risk oil breakthrough during subsequent operation. Replace the complete cartridge set using the 2901140431 Kit B at the specified interval.

How do I verify a genuine Atlas Copco 2901140431 kit?

Genuine Atlas Copco service kits carry Atlas Copco branding on the outer packaging and on individually packaged components. Verify the part number 2901140431 through the Atlas Copco parts portal or an authorized distributor. Non-genuine filter media may not meet the DIBT certification standards. Substandard carbon cartridges can allow oil to pass into the drainage system, creating an environmental compliance violation.