EPDM rubber gasket flat rectangle flange rubber gasket

An EPDM rubber gasket for a flat rectangular flange should follow the full contact outline, including corner radii and the space between fasteners. The long sides may receive different compression from the corners if the mating flange bends during closure. Choose the section and support around that complete geometry rather than the outside rectangle alone.

Check the inner opening, thickness, and fixing positions. Select the EPDM formulation for the actual medium, temperature, and cleaning exposure. Leave enough sealing width beside fastener holes and keep the gasket from entering a passage as it deforms.

Lay the part flat without stretching it to align the last hole. Bring the flange faces together evenly and inspect the exposed perimeter. During disassembly, compare contact marks along the middle of each side with those near fasteners. Uneven compression may require attention to the flange or closing arrangement before replacement, rather than a thicker gasket that alters the whole joint's closing position.

Material options

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

Hardness selection

Rubber: 30–90 Shore A. The long sides may receive different compression from the corners if the mating flange bends during closure.

Custom dimensions

Check the inner opening, thickness, and fixing positions.

Fit & assembly

Lay the part flat without stretching it to align the last hole.

Use & inspection

Uneven compression may require attention to the flange or closing arrangement before replacement, rather than a thicker gasket that alters the whole joint's closing position.

Photos illustrate structure or material only. An EPDM rubber gasket for a flat rectangular flange should follow the full contact outline, including corner radii and the space between fasteners. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.