21
Keeping the World Flowing
Maintenance
11.1.2
Pneumatic actuator seals replacement
Original spare parts and accessories can be ordered from your
local Rotork office.
When ordering spare parts, it is necessary to provide the
following:
1. The actuator model and serial number from nameplate
(see section 4.2).
2. The spare part item number, quantity and description
(see table 5).
Some actuators have a special spare parts list. Refer to the
project specific documentation for further details.
11.1.2.1 Preparation
a) Remove the actuator from the valve (see Section 8).
b) The actuator modules are to be disassembled in a clean
area, free of dust.
c) Place the actuator in a stable position, e.g. on a
workbench.
d) If the actuator is provided with a control panel,
remove the panel and any other component fitted to
the pneumatic actuator (refer to the project specific
documentation for the details).
e) Remove the limit switch box (if present) and its mounting
bracket.
11.1.2.2 Removing the spring module
Equipment required to remove the spring module from the
actuator:
1. Adjustable air regulator
2. Air tubing and fittings connect the regulator to the
actuator air port
3. Spring shaft retainer
4. Bolts for the spring retainer
Spring principal parts (see Fig. 8):
(1) Spring housing
(2) Spring cover
(3) Spring retainer
(4) Spring anchor bolt
(5) Power spring
(6) Socket head screw
(4)
(5)
(1)
(6)
(3)
(2)
Figure 8: Spring principal parts.
