M6 SERIES IOM
6th EDITION
ISSUED 12/2014
26
B. Spring Configurations
The Contromatics M series actuator uses fully encapsulated, preloaded spring
cartridges that are easily configured for adjustable spring return torque. While DA
(double acting) refers to an actuator without springs, the letter “K” followed by the
number of springs in each end cap is used for the different spring configurations.
Below are the proper spring configurations as seen from the back of a piston.
Thus, a K11, K22, and K33 actuator will have 1, 2, and 3 springs
per piston
(i.e.
2, 4, and 6 springs
per actuator
) respectively. Note the dotted outline of the rack
on the
left side of the piston illustrations below. The rack location determines
orientation of the springs, and the configurations below allow for the most
efficient use of the spring force as well as balancing it across the face of the
pistons. Doing this both increases the efficiency and the life of the Contromatics
actuator.
K11
K22
K33
K44
K55
K66
1
1
2
2
1
3
1
2
3
4
2
3
1
4
5
2
3
1
4
6
5
