Atlas Copco Moisture Trap / Water Separator Kit Replacement – 2901-0073-00

Atlas Copco 2901-0073-00 – Moisture Trap / Water Separator Kit

The Atlas Copco 2901-0073-00 (2901007300) is a Moisture Trap / Water Separator Kit used in compatible Atlas Copco compressor systems. It is designed to collect and remove condensed moisture from the compressed-air system, helping prevent accumulated water from entering downstream equipment.

The part is also referred to as a Water Drain Kit or Water Separator Kit in parts references.

Working Process:

During compression, atmospheric air naturally contains moisture. As the air is compressed and subsequently cooled, part of this moisture condenses into liquid water.

The moisture trap/water separator assembly collects this condensed water from the compressed-air circuit.

The 2901-0073-00 kit provides the service components required to maintain the moisture-separation and drainage function.

As compressed air enters the separator, the change in flow direction and separation mechanism allows liquid water droplets to separate from the compressed-air stream. The accumulated condensate collects at the lower section of the separator.

When the condensate reaches the required level, the drain mechanism removes the accumulated water from the system.

This prevents water from remaining in the compressed-air circuit and being carried downstream.

Main Functions:

• Separates condensed water from compressed air.
• Collects moisture at the separator drain point.
• Allows accumulated condensate to be discharged.
• Helps prevent water from entering downstream air equipment.
• Supports reliable compressed-air quality.
• Reduces the risk of corrosion and moisture-related problems in downstream components.

The kit is particularly important in compressed-air systems operating under changing temperature and humidity conditions, where significant condensate can form.

Working Sequence:

1. Air Entry: Moist compressed air enters the separator assembly.
2. Separation: Water droplets are separated from the airflow.
3. Collection: Condensed water collects in the designated drain area.
4. Drainage: The drain mechanism releases the accumulated condensate.
5. Dryer Air Outlet: Separated compressed air continues toward the downstream system.

The separation and drainage process prevents liquid water from accumulating inside the compressed-air distribution system.

Importance of the Drain System:

If condensate is not removed effectively, water can accumulate in air receivers, piping, filters and downstream equipment.

Excessive moisture can cause:

• Internal corrosion
• Reduced performance of pneumatic equipment
• Contamination of downstream processes
• Damage to air-treatment components
• Increased maintenance requirements
• Reduced compressed-air quality

A properly functioning moisture trap therefore contributes to reliable operation of the complete compressed-air system.

Possible Failure Conditions:

The moisture trap or drain mechanism may become contaminated by dirt, oil deposits or particulate matter.

Sealing components can also deteriorate with age and operating conditions.

A blocked drain can prevent condensate from being removed.

A leaking drain mechanism can continuously discharge compressed air, increasing energy consumption.

A damaged separator component can reduce water-removal effectiveness and allow moisture to pass downstream.

Typical symptoms may include:

• Water accumulation in downstream piping
• Continuous air leakage from the drain
• Poor condensate removal
• Frequent moisture-related problems
• Contaminated downstream air
• Increased compressor energy consumption

Maintenance Procedure:

Before servicing the moisture trap, the compressor/air system must be stopped, isolated and depressurized according to the applicable Atlas Copco safety procedure.

The separator and drain assembly should be inspected for contamination, blockage, leakage, corrosion and damaged sealing components.

The existing worn components should be removed carefully.

The 2901-0073-00 Moisture Trap / Water Separator Kit should be installed according to the applicable compressor service procedure.

All sealing surfaces should be clean and free from dirt, oil deposits and foreign particles.

The drain mechanism should be checked for unrestricted operation.

After assembly, the separator should be checked for correct installation and leakage.

The compressor should then be restarted and the drain operation observed.

Condensate should be removed effectively without excessive continuous compressed-air loss.

The downstream air system should also be inspected for abnormal moisture accumulation.

Correct maintenance of the moisture trap helps maintain efficient condensate removal and protects downstream compressed-air equipment.

Part Number: 2901-0073-00
Alternative Number: 2901007300 / 2901 0073 00
Brand: Atlas Copco
Part Description: Moisture Trap Kit / Water Separator Kit
Also Referenced As: Water Drain Kit
Component Type: Condensate separation and drainage service kit
Primary Function: Separates and removes condensed water from compressed air
Secondary Function: Prevents accumulated moisture from reaching downstream equipment
Operating Function: Separates condensate, collects it and allows controlled drainage
Main Benefits: Improved condensate removal, reduced moisture carryover, protection of downstream equipment, reduced corrosion risk and improved compressed-air system reliability.

Disclaimer: All manufacturer names, trademarks, model numbers, and part numbers are used solely for identification and compatibility purposes. Our products are high-quality aftermarket replacement products and are not manufactured, sponsored, endorsed, or authorized by the original equipment manufacturer (OEM). All trademarks remain the property of their respective owners.