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Tunstall Corporation
118 Exchange Street • Chicopee, MA 01013
© July 2014
We reserve the right to alter designs, specifications and information without notice.
Phone [phone] · Fax [phone]
www.tunstall-inc.com • www.maconcontrols.com
Bulletin-VM2-10V-0714
Electric Operators
ELECTRIC ZONE VALVE ACTUATOR
VM 2-10V
Description
The precise regulation of VM 2-10 V gives a constant
valve flow corresponding to the signal from the tem-
perature regulator resulting in a very high comfort. A
built in processor is programmed with very useful
functions such as self-calibration, valve flow linearity
etc. It also has an every 24-hour stroke function pre-
venting the valve spindle from getting stuck. It has a
red visible position indicator located just above the
connection nut. 2-10 voltage regulation gives a long
life time cycle. Electrical connection is easily done by
the means of push in modular cable. VM 2-10 V
matches all MMA valves. To fit other makes it can be
used in combination with one of our adaptors. VM is
also available with M30x1.5 connection.
Specifications
Data
Power consumption start 5VA
Power consumptions operating 3VA
Flow position NC
Supply voltage 24V AC + 10%
Control current 0.4mA
Closing and opening time ca 3 min
Stroke ca 0.157 inch
Operating force 22.5 lbs
Ambient temp. max 122 F
Design
Body material Polyamide
Nut material Brass
Connection cable Modular cable (K121-1m) 3 ft.
Color RAL 9016
Weight 4.94 oz.
Valve Function - Without Power (No Current)
Application
Radiator
Valve
Cooling
Valve
3-Way
Valve
VM 2-10V Closed Open Port B
Closed
Actuator
Type
Areas of Use
Actuator VM 2-10V is used to regulate valves in heat-
ing and cooling systems.
Installation Position
Dimensions