Custom made FKM rubber o ring FKM flat rubber ring

An FKM seal, whether a flat rubber ring or a round-section O-ring, must be specified by its actual section and dimensions as well as its formulation. A flat ring profile and a round section may require different groove shapes. Matching outside diameter alone can leave a seal that compresses incorrectly in the receiving joint.

Select the FKM formulation for the actual medium and operating conditions. A Viton-related material description does not establish universal chemical resistance or a single temperature limit for every ring. The joint's movement, support and fastening also influence the sealing duty.

Check the ring against its intended seat before closing the assembly. It should lie without a twist, stretched section or particle trapped beneath it. Evaluate the complete joint under its relevant service conditions. During replacement, keep the chosen material and new-part geometry associated with the application, rather than matching a deformed used ring whose original section may no longer be apparent after compression and exposure.

Material options

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

Hardness selection

Rubber: 30–90 Shore A. Matching outside diameter alone can leave a seal that compresses incorrectly in the receiving joint.

Custom dimensions

A flat ring profile and a round section may require different groove shapes.

Fit & assembly

Check the ring against its intended seat before closing the assembly.

Use & inspection

During replacement, keep the chosen material and new-part geometry associated with the application, rather than matching a deformed used ring whose original section may no longer be apparent after compression and exposure.

Photos illustrate structure or material only. The joint's movement, support and fastening also influence the sealing duty. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.