VICI EMH Technical Notes

Valco Instruments Co. Inc.
Multiposition
Microelectric Valve Actuators
Models EMH and EMT with Controllers EMHCA-CE or EMTCA-CE
(shipped prior to 2/1/19)
The microelectric multiposition actuator consists of a control module, a steppermotor/gearbox assembly,
a manual controller (use is optional), a universal AC input (100-240 VAC, 50-60 Hz) to 24 VDC power
supply, and the interconnecting cables.
The time it takes to step a valve from one position to another depends upon the actuator model, the
number of positions for which the actuator is set, and the total amount of rotation involved. Actual
times can be computed from the tables below.
EMH ( high speed ) actuator
Number of
positions
set
4
6
8
10
12
16
NOTE: With the exception of Valco P type valves (which have a visible coil spring), all our multiposi-
tion valves are keyed to provide automatic alignment on a microelectric actuator. However, not all
standoffs (an extension which holds the valve away from the actuator) are keyed. Therefore, if you
are ordering components separately or retrofitting a valve and actuator with a standoff, make sure you
specify a keyed standoff so that you can take full advantage of the ease of alignment provided by a
keyed standoff, microelectric actuator, and valve.
Installation and Use
Getting Started
Figure 1 on the next page shows the functions of the cables supplied with the actuator. There are four
connectors on the control module, keyed and sized to prevent incorrect connection.
Time req. Time per
to move additional
one position position
332 ms 216 ms
260 ms 149 ms
220 ms 111 ms
200 ms 87 ms
188 ms 72 ms
166 ms 54 ms
EMT ( high torque ) actuator
Number of Time req.
positions to move
set one position
4 1161 ms
6 831 ms
8 665 ms
10 563 ms
12 497 ms
16 412 ms
1
Technical Note 415
Time per
additional
position
999 ms
663 ms
496 ms
399 ms
333 ms
251 ms