Different shape flat silicone rubber NBR gasket machine seal ring

A machine seal ring with a flat custom outline can follow the contact face around a machine opening. Local details such as a locating boss, a narrow land or an interrupted edge matter as much as the overall shape. The gasket should remain supported where the assembly applies compression.

Silicone and NBR are separate material choices, selected according to the medium and service conditions. Custom production can adapt the perimeter and openings to the machine geometry. Include the intended installed thickness and the movement used to bring the mating parts together.

Place the flat seal without pulling a narrow section around an obstruction. Check alignment at the local features before the upper face hides them. If the assembly does not close as intended, inspect for a trapped section rather than increasing fastening force. During service, compare wear at those features with the mating surfaces. A repeated cut at one location may indicate a damaged edge that should be repaired before the new ring is fitted.

Material options

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

Hardness selection

Rubber: 30–90 Shore A. Silicone: 20–80 Shore A. Include the intended installed thickness and the movement used to bring the mating parts together.

Custom dimensions

Local details such as a locating boss, a narrow land or an interrupted edge matter as much as the overall shape.

Fit & assembly

If the assembly does not close as intended, inspect for a trapped section rather than increasing fastening force.

Use & inspection

A repeated cut at one location may indicate a damaged edge that should be repaired before the new ring is fitted.

Photos illustrate structure or material only. A machine seal ring with a flat custom outline can follow the contact face around a machine opening. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.