Custom food grade silicone rubber FKM mechanical seal o ring

A mechanical seal O ring is a custom rubber ring fitted within a sealing assembly. Its cross section and diameter need to match the receiving groove and the intended compression. Material selection is a separate decision from the ring size, especially where a food-contact role is involved.

Silicone and Viton-type fluorocarbon compounds are different material choices. Select the specific compound for the actual medium, temperature, cleaning exposure, and any applicable contact requirements. A general elastomer name does not establish that every version is suitable for the same process. The ring's mechanical role also matters, including whether it remains stationary or experiences movement within the assembly.

Check the groove dimensions and surface condition before installation. The ring needs space to deform as intended without being pinched or left loose. Avoid twisting it or dragging it across sharp threads during assembly, and use only assembly aids compatible with the selected materials and process. Inspect the completed joint under its operating conditions. During replacement, examine the mating surfaces and locating features as well as the old ring; wear or misalignment in those parts can prevent a correctly sized replacement from working as intended.

Material options

FKM / Silicone. Custom formulation and color for the intended contact conditions.

Hardness selection

Rubber: 30–90 Shore A. Silicone: 20–80 Shore A. The ring's mechanical role also matters, including whether it remains stationary or experiences movement within the assembly.

Custom dimensions

Check the groove dimensions and surface condition before installation.

Fit & assembly

Avoid twisting it or dragging it across sharp threads during assembly, and use only assembly aids compatible with the selected materials and process.

Use & inspection

Select the specific compound for the actual medium, temperature, cleaning exposure, and any applicable contact requirements.

Photos illustrate structure or material only. Material selection is a separate decision from the ring size, especially where a food-contact role is involved. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.