Atlas Copco ZR450–750 Intercooler Service Kit Replacement – 2906048800

Atlas Copco 2906048800 – ZR450–750 Intercooler Service Kit

The Atlas Copco 2906048800 (2906-0488-00) Intercooler Kit is a service and maintenance kit designed for compatible ZR450–750 ZR/ZT oil-free compressors. Its primary purpose is to restore the sealing and connection components of the intercooler assembly during scheduled maintenance.

Atlas Copco officially describes the product as “ZR450-750 INTERCOOLER KIT FOR ZR ZT OIL FREE COMPRESSORS” and lists its weight as 2.5 kg.

Working Process:

In a multi-stage oil-free screw compressor, air is compressed in stages. The compression process increases the temperature of the air significantly.

After the first compression stage, the hot intermediate-pressure air passes through the intercooler before entering the next compression stage.

The intercooler removes heat from the compressed air by transferring heat to the cooling medium. Cooling the air between stages reduces its temperature and volume, which helps the following compression stage operate efficiently.

Effective intercooling is therefore important for maintaining the compressor’s designed capacity, temperature and energy efficiency.

The 2906048800 Intercooler Service Kit provides replacement sealing and connection components required when servicing the intercooler assembly.

Atlas Copco’s official component list includes:

• Seal – 1 pc
• O-ring – 1 pc
• O-ring – 1 pc
• Ring – 2 pcs
• Plug 1/4 A A – 4 pcs
• Gasket – 1 pc
• O-rings – 2 pcs
• O-rings – 2 pcs
• Dowty Seal Washer 1/4 – 4 pcs
• O-ring – 1 pc

The O-rings and seals maintain airtight connections between the intercooler and its associated piping and compressor components.

The gasket provides sealing between designated mating surfaces.

The Dowty seal washers provide reliable sealing around applicable threaded or bolted connections.

The plugs and rings maintain the integrity of designated ports and connection points within the intercooler assembly.

During normal compressor operation, the intercooler is exposed to elevated air temperature, pressure fluctuations, vibration and repeated thermal expansion and contraction.

Over time, O-rings and other sealing materials can become hard, flattened, cracked or lose their elasticity.

A deteriorated seal can cause compressed-air leakage. Leakage reduces the pressure available for the next compression stage and can reduce overall compressor efficiency.

A damaged gasket or Dowty washer can similarly cause leakage around the intercooler connections.

If the intercooler becomes contaminated or its passages become restricted, heat transfer can deteriorate. Higher inter-stage air temperature can increase the thermal load on the following compression stage and negatively affect compressor performance.

Maintenance Procedure:

Before servicing the intercooler, the compressor must be stopped, electrically isolated, completely depressurized and allowed to cool according to the applicable Atlas Copco safety procedure.

The intercooler should be inspected for:

• Air leakage
• Corrosion
• Contamination
• Restricted passages
• Damaged connections
• Deteriorated O-rings
• Damaged gaskets
• Worn sealing washers

The old sealing components should be removed carefully without scratching or damaging the intercooler sealing surfaces.

The 2906048800 Intercooler Service Kit should be used to replace the applicable O-rings, seals, gasket, plugs, rings and Dowty sealing washers.

All mating surfaces must be clean and free from dirt, old seal material, corrosion and foreign particles.

Each O-ring must be installed in its correct groove without twisting, cutting, overstretching or pinching.

The gasket and sealing washers must be correctly positioned before the connections are tightened.

The plugs must be installed in their correct locations and tightened according to the applicable Atlas Copco service specifications.

After reassembly, all intercooler connections should be inspected for proper installation and mechanical security.

The compressor should then be restarted and monitored during unloaded and loaded operation.

Inter-stage temperature and pressure should be monitored together with the intercooler for signs of leakage or abnormal operating temperature.

A correctly functioning intercooler should reduce the temperature of the air between compression stages, allowing the next compression stage to operate under the intended conditions.

Using the Atlas Copco 2906048800 Intercooler Service Kit during the appropriate maintenance operation helps restore sealing performance, prevent compressed-air leakage and maintain efficient intercooling.

Part Number: 2906048800
Alternative Number: 2906-0488-00 / 2906 0488 00
Brand: Atlas Copco
Part Description: ZR450–750 Intercooler Service Kit
Official Description: ZR450–750 Intercooler Kit for ZR/ZT Oil-Free Compressors
Application: Atlas Copco ZR450–750 oil-free compressors
Component Type: Intercooler service/maintenance kit
Official Listed Weight: 2.5 kg
Main Components: Seals, O-rings, rings, plugs, gasket and Dowty seal washers
Primary Function: Maintains the sealing and connection integrity of the intercooler assembly
Secondary Function: Supports efficient heat removal between compression stages
Operating Function: Allows the intercooler to reduce intermediate compressed-air temperature before the next compression stage
Main Benefits: Reduced air leakage, improved intercooling, controlled inter-stage temperature, improved compression efficiency and reliable compressor operation.

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