for mechanical joints, in hydraulic and pneumatic environments. Its function is to make and maintain the sealing and therefore it must meet the following requirements:
- To adapt to surface irregularities under the action of tightening;
- To not allow the passage of fluid, under the given working conditions.
Composition: blend of rubber of different qualities and hardness, resistant to oil products with good gas impermeability.
Rubber characteristics: see dictionary
On beneficiaries demand, other constructive types (variants) can be executed.