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4. Relative tightness
4.1 By deformation
As with absolute sealing, bellows or deformable membranes are used, but these are made from elastomers. As these materials are not totally impermeable, very small leakage is possible, especially with gases.
Elastomer bellows (figure 11 ) are flexible, compressible containers used mainly as a means of protection against dust and splashes, as their resistance to pressure is very low.
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Relative tightness
Conclusion
Bibliography
Standards
- Hydraulic and pneumatic transmissions – O-rings – Part 1: internal diameters, cross-sections, tolerances and dimensional identification code. - ISO 3601-1 - 2012
- Hydraulic transmissions – Cylinders – Dimensions and tolerances of seal housings for single-acting pistons and piston rods in reciprocating applications. - ISO 5597 - 2018
- Hydraulic cylinders – Dimensions and tolerances of housings for plastic-reinforced...
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