Oil separator 46555952 IR Screw Compressor Air Oil Separator

Causes of failures/ apparent failures

• Scavenge line dented

This restricts scavenging action by not allowing a sufficient quantity of oil to be removed.

Result: high oil carry over.

• Scavenge line bent due to mishandling

Be careful not to bend the scavenge line when removing the air / oil separator tank flange and placing it on the floor. A bent scavenge line will not be able to remove oil from the separator.

Result: high oil carry over.

• Scavenge line ferrule at air/oil separator tank flange

If the ferrule does not form a tight seal, air instead of oil will be sucked up by the scavenge line.

Result: high oil carry over

• Scavenge line restricting orifice

Some, not all, compressors have such and orifice installed at some point in the line. It is a small item and in dark compressor rooms when dismantling the scavenge line it can unknowingly be dropped / lost.

• Scavenge line ID

It is not unknown for compressors of the same make and model to have different diameter scavenge lines. Those with a smaller internal diameter will scavenge less oil than those with a larger internal diameter.

Result: higher oil carry over.

• Installation: inside pressure reservoir
• Residual oil content: less than 3 PPM
• Operating temperature: up to 120°C
• Initial pressure drop: less than 0.2 bar

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AIR OIL SEPARATOR — SEPARATES THE OIL FROM THE COMPRESSED AIR