O-ring SCHAERER Spare Parts 3370062693

An O-ring creates a seal between two surfaces by compressing its circular cross-section into the gap. The material must stay flexible across the working temperatures of the machine and resist the fluids it contacts without swelling or cracking. EPDM rubber is chosen for its stability in hot water, steam and cleaning chemicals, making it suitable for coffee equipment where hygiene and repeated thermal cycles are routine.

The operator removes the worn seal, cleans the groove, and presses the new O-ring into place until it sits evenly without twisting. No tools are required beyond a non-metallic pick to lift the old ring. Once seated, the O-ring is ready for immediate service.

This O-ring is moulded in black EPDM rubber to a hardness of 70 Shore A, which balances flexibility and wear resistance. The dimensions—5.28 mm inside diameter and 1.78 mm cross-section—determine the exact groove it fits, ensuring the seal is neither stretched nor pinched when installed.

The part is a direct replacement for the specified SCHAERER coffee machines and related catering equipment where the same groove dimensions and material properties are required.