| The rubber valve for tubeless tyres is designed so that the wheel rim opening seals hermetically. The elastic material of the valve body is compressed hard against the wheel rim opening. |
| For threaded valves with a metal foot, a rubber gasket serves to make the seal. The valve hole boundary areas are sealing areas. Therefore they must be free of rust, contamination and damage. |
| The valve cone has the most important purpose: it seals and allows the checking and control of the tyre pressure. The small plate seal can only operate correctly if it clean and dry. The equipment used to inflate the tyres must be dry and free of oil. |
| A cap should always be screwed on the valves. It prevents dirt from getting into the valve. If the valve is soiled, the dirt could reach the valve plate when inflating the tyre resulting in leakage. |
| The valve should be changed every time the tyre is assembled. |
| If the vehicle is driven without valve cap, dirt can get into the valve. This can result in a slow leak: |
| t
| Detachment of the polymer casing → Fig. |
| t
| Dents along the edge of the bead zone → Fig. |
| t
| Detached tread and guard → Fig. |
WARNING | The valve is only safely sealed if the hood is screwed on tightly. |
|
|
|
|
