Servicing; Replacing Parts Subject To Wear - Samson 3275 Mounting And Operating Instructions

Servicing

7 Servicing
DANGER
!
Risk of bursting in the actuator.
Actuators are pressurized. Improper opening
can lead to actuator components bursting.
Before starting any work on the actuator, de-
pressurize all plant sections concerned and
the actuator.
NOTICE
!
Risk of actuator damage due to incorrect
service or repair.
− Do not perform any service or repair work
other than the activities described in this
section on your own. Contact SAMSON's
After-sales Service department.
− Service and repair work must only be per-
formed by staff trained for this purpose.
NOTICE
!
Risk of actuator damage due to excessively
high or low tightening torques.
Observe the specified torques on tightening
actuator components. Excessively tightened
torques lead to parts wearing out quicker.
Parts that are not tightened far enough may
loosen.
Observe the specified tightening torques
(u AB 0100).
NOTICE
!
Risk of actuator damage due to the use of
unsuitable lubricants.
22
Only use lubricants approved by SAMSON
(u AB 0100).
Note
− The product warranty becomes void if
service or repair work not described in
these instructions is performed without
prior agreement by SAMSON's After-sales
Service department.
− Only use original spare parts by
SAMSON, which comply with the original
specifications.
7.1 Replacing parts subject to
wear
Parts subject to wear
− Piston rod seal (A2)
− O-ring (A5)
− Damping seal (A21)
− Piston seal (A7)
− Piston guide band (A8)
− For actuator with 314 and 490 cm²
only: wiper ring (A241) and dry bearing
(A242). See Fig. 8.
1. Lift the actuator off the valve. See sec-
tion 9.2.
2. Unscrew collar nuts (A11) on the cylin-
der cover.
3. Pull off the tie rods (A12) towards the
side with the piston rod.
4. Remove the base (A4).
EB 8314 EN