Emerson EL-O-Matic F Series - Spring-Return Actuators (Size 25 to 600)

Reassembly
9.5.2 Spring-Return actuators (Size 25 to 600)
Important
EL-O-Matic F-Series Spring return actuators are supplied with springs on each side of the
actuator. Throughout the F-Series size range, there are three different spring designs:
— Size F12 has only 1 spring on each side.
— Sizes F25 to F600 have 6 springs on each side (see gure below).
— Sizes F950 to F4000 have 3 springs on each side (see chapter 9.5.3 ).
Check below gures to see where to place the spring cartridges in case of spring set
conversion.
When replacing spring cartridges in a spring-return actuator, ensure that the cartridges are
replaced in their identical position from where they were removed.
Before assembling the spring cartridges and end caps, make sure that the pistons are
completely inwards.
Figure 32 Spring placement size 25 to 600
1
2 3
4
56
A
B
1
2
3
4
56
1
23
4
56
N = 10 N = 20
N = 30
1
2 3
4
56
1
23
4
5
6
1
23
4
5
6
N = 40
N = 50
N = 60
A = Piston top view
B = Position of gear rack
Installation, Operation and Maintenance Manual
DOC.IOM.EF.EN Rev. 7
September 2017
41
Section 9: Reassembly