2906077200 Oil Resistant O Ring Seal Kit For Atlas Screw Compressor Service

Product Introduction

Air and oil stay where they belong only if the seal lands and O rings are fresh and seated correctly, not pinched, rolled, or reused until they crack. 2906077200 is an Atlas Copco compressor seal and O ring service item used on oil injected rotary screw packages, commonly at separator, filter housing, valve, or line connection seal points in the lube and air treatment path. Its job is to preserve the pressure boundary and prevent oil or air leaks and post service carry over issues caused by bypass at worn seals.

A hardened, flattened, or nicked seal rarely announces failure loudly. It shows up as weeping oil, pressure or differential pressure instability, air leakage, hard to trace oil in air symptoms, or complaints that the machine still leaks after an element change. Replace during separator, filter, or valve service or when the original shows compression set or cracking. Never reuse old O rings to save a few cents. During fitting, relieve all pressure, clean both seal faces without sharp tools, lightly lubricate per specification, seat without twisting or rolling, and retorque the cover or housing to specification. Also verify drain and return paths and check that the associated element or cover is not cocked.

Confirm the full extended part number, machine model and serial, housing or valve location, and the removed seal size and material before dispatch. O rings and gaskets often look identical in photos but differ by elastomer such as NBR, FKM, or FFKM, cross section, inner diameter, and duty rating for oil, air, or high temperature. Not to be substituted by appearance alone. Also called O ring, seal ring, gasket, service seal kit, compressor sealing washer.