O-ring SCHAERER Spare Parts 3370063495

An O-ring creates a leak-proof seal between two surfaces by compressing a circular elastomer ring into a groove. The material is chosen for resilience under pressure and temperature swings typical of coffee-machine water and steam circuits. VMQ (silicone) at 70 Shore A hardness resists heat, water and cleaning chemicals without hardening or cracking, so the seal stays tight over repeated heating and cooling cycles.

The operator removes the worn ring, cleans the groove, fits the new O-ring without twisting, and reassembles the joint. No tools are required beyond a pick or small screwdriver to lift the old ring.

This O-ring is manufactured to the exact 6.75 mm inside diameter and 1.78 mm cross-section specified by SCHAERER for its coffee equipment. The VMQ 70 Shore A grade ensures consistent sealing performance across the full working temperature range of the machine.

Cleaning is limited to wiping the ring with a damp cloth before installation; no solvents or abrasives are needed.