Reassembly
9.5.2
Spring-Return Actuators (Size 40 to 600)
Important
Bettis Q-Series Spring return actuators are supplied with springs on each side of the
actuator. Throughout the Q-Series size range, there are three different spring designs:
—
Sizes Q40 to Q600 have 6 springs on each side (see Figure 37).
—
Sizes Q950 to Q1600 have 3 springs on each side (see Section 9.5.3).
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 37
Spring Placement Size 40 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 piston gear rack
48
April 2019
Installation, Operation and Maintenance Manual
DOC.IOM.BQ.E Rev. 3
Section 9: Reassembly