Molded industrial rubber sealing ring/flange rubber washer

A flange rubber washer can be custom molded as an industrial sealing ring for a particular flange interface. The inner opening, outer contour and thickness should follow the actual sealing face and its support. The part needs to stay clear of any passage while maintaining the contact area required around it.

Check the relationship to fastening and locating features before assembly. A ring that fits the central opening may still overlap an unsupported region or shift as the flange closes. Place it naturally on a clean face and verify that the intended contour remains aligned.

Select the finished compound for the medium, temperature and operating conditions of the joint. Evaluate the assembled seal using the intended flange arrangement rather than assuming one washer fits all similar openings. On disassembly, inspect for extrusion, cuts and uneven compression marks. A replacement should match the working profile and thickness. Repeated damage at one side warrants checking flange alignment and face condition before simply installing a thicker ring.

Material options

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

Hardness selection

Rubber: 30–90 Shore A. Choose the gasket stiffness around its outer contour and supported sealing width, allowing the selected thickness to compress within the joint.

Custom dimensions

The inner opening, outer contour and thickness should follow the actual sealing face and its support.

Fit & assembly

Check the relationship to fastening and locating features before assembly.

Use & inspection

Repeated damage at one side warrants checking flange alignment and face condition before simply installing a thicker ring.

Photos illustrate structure or material only. A ring that fits the central opening may still overlap an unsupported region or shift as the flange closes. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.