Operation Manual

Continuous valve actuator CHEOPS control
theben
As of: Jul-11 (Subject to change without notice) Page 56 of 71
5.5 Valves and valve seals
5.5.1 Valve structure
Tappet
Rubber seal
Valve seat
5.5.2 Valves and valve seals
When idle, i.e. tappet not actuated, the tappet is pushed outwards by the spring and the valve
opens (100% with normal effect).
When the tappet is pushed, the rubber seal is pressed into the valve seat and the valve closes
(0% position with normal effect).
The valve does not close immediately on touching the valve seat, depending on the
characteristics, the existing tappet may have to move onwards until the valve is fully closed.
This response depends on the hardness, shape, aging or damage to the valve seal.
To correct the influence of this parameter, Cheops allows an additional pressing of the valve
seal to be entered (see also Troubleshooting).
Caution: In order to avoid seal damage, the value should be increased by max. 10
increments.