Disassembling The Actuator - Samson EB 31a Mounting And Operating Instructions

Removal
Figure 11-2: Disassembling the end cap
Release the spring compression. Unscrew each end cap
screw (13) one rotation each according to the order shown in
Figure 11-1 and the number of rotations specifi ed in
Table 11-1.
Table 11-1: Number of rotations
Rotary actuator
DAP / SRP
15
30
60
100
150
220
300
450
600
900
1200
2000
3000
4000
5000
10000
WARNING
Danger of injury due to compressed springs!
The end caps are tensioned when the springs are compressed.
If after unscrewing the screws (13) with the number of rotations
specifi ed in Table 11-1 force is still applied on the end caps (23
and 23), the spring cartridge is possibly damaged or the pistons
are not completely closed.
Stop disassembly and contact PFEIFFER.
Do not disassemble an individual spring cartridge.
Contact PFEIFFER to service the spring cartridges.
11-2
Number of screw rotations (13)
26 ... 28 Rotations
5 ... 7 Rotations
6 ... 8 Rotations
8 ... 10 Rotations

11.2 Disassembling the actuator

Figure 11-3: Disassembling the valve
Table 11-2: Components for valve disassembly
Pos.
A
B
C
D
Disassemble the rotary actuator (A) from the valve (B) as follows:
Do not endanger the plant.
Disconnect the electrical/pneumatic/hydraulic energy supply
from the rotary actuator.
Vent the actuator.
If available, disconnect the electrical wiring for the control or
signalling devices, see the documentation from the respective
control or signalling device manufacturer.
To disconnect the actuator and valve, two assembly variations
must be observed.
Disassembly in the case of direct assembly
Loosen the screws on the ISO fl ange.
Disconnect the rotary actuator (A) and valve (B).
Insert the square drive, fl at head drive or key drive of the valve
shaft directly into the actuator shaft of the actuator.
Release and remove the components.
Disassembling in the case of assembly using a bracket
Release the screws fi xing the rotary actuator (A) to the
bracket (C).
Separate the rotary actuator (A) from the bracket (C).
Release and remove the coupling (D) from the valve shaft.
If necessary, release the screws fi xing the valve (A) to the
bracket (C).
Separate the bracket from the valve.
Designation
Rotary actuator
Valve
Console
Coupling
EB 31a_EN
December 2022 edition
Subject to technical changes