Custom molded heat resistant silicone o ring seal

A silicone o ring seal for a heated joint should be selected around the temperature at the actual sealing location. The mating components may change their gap as they warm and cool, so the ring needs an appropriate contact condition across the relevant cycle. The selected silicone formulation and section should be assessed together with that geometry.

Match the groove, installed diameter, and support in the direction of pressure. Include the contacting medium and any cleaning substances in the material selection. A section chosen simply to feel tight during cold assembly may create an unsuitable condition at another operating state.

Fit the ring without twist and protect it from edges on the assembly route. Inspect for pinching before the joint is put into service. During maintenance, compare the recovered shape with the groove and look for localized extrusion or permanent deformation. If sealing changes during heating or cooling, investigate the changing joint clearance instead of automatically increasing ring thickness in a way that may overcompress another region.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. Match the groove, installed diameter, and support in the direction of pressure.

Custom dimensions

If sealing changes during heating or cooling, investigate the changing joint clearance instead of automatically increasing ring thickness in a way that may overcompress another region.

Fit & assembly

Fit the ring without twist and protect it from edges on the assembly route.

Use & inspection

Inspect for pinching before the joint is put into service.

Photos illustrate structure or material only. A silicone o ring seal for a heated joint should be selected around the temperature at the actual sealing location. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.