Oil Seals

X

Oil Seals

• When compressed, as with an O-ring or face gasket, pressure acts in essentially a vertical direction relative to the face, squeezing between two opposing surfaces to eliminate gaps.
• Outward expansion results in the horizontal direction as a pressure relief, and this profile change needs to be accommodated in the mounting surface design.
• Compression forces need to be assessed. Various design elements can be introduced if too high; i.e., lower durometer, hollow shapes, sponge/foam and/or thin walls.
• Recommended compression range is 10% - 30%, and no more than 50%.

Dynamic Seals:

Where repeated motions act upon the seal as in a circumferential, axial or angular direction, a dynamic condition exists. Repeated actions upon the seal, either regularly or periodic,this type of seal; i.e. a piston ring seal or shock absorption mechanism.

Design Considerations are more complex than static seals, primarily resulting from the changing stress levels. In addition to the static seal considerations, the environment may require:

• Abrasion resistance becomes important and is affected by the mating surface finishes.
• Recovery speed after compression to the original released height.
• Compression set, or the percentage of relaxation of the dimensions versus the original uncompressed dimensions
• Temperature changes, thermal cycling.
• Distortion: squeeze, stretch - ability to recover.
• Physical strength: tensile strength, tear resistance.

Atul Rubber is the leading Manufacturer of Oil Seals, Rubber Seals, Extruded Rubber Seals, Rubber Gasket & Seal Rubber Products from Ahmedabad, India