Spring-Return Actuators (Size 25 To 600) - Emerson EL-O-Matic F-Series Installation, Operation And Maintenance Manual

Installation, Operation and Maintenance Manual
DOC.IOM.EF.EN Rev. 7
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:
Check below figures 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
A
B
A = Piston top view
B = Position of gear rack
Reassembly
— Size F12 has only 1 spring on each side.
— Sizes F25 to F600 have 6 springs on each side (see figure below).
— Sizes F950 to F4000 have 3 springs on each side (see chapter 9.5.3 ).
Spring placement size 25 to 600
N = 10
N = 40
Section 9: Reassembly
N = 20
N = 50
September 2017
N = 30
N = 60
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