ISO 9001
CONTROLLI S.p.A.
16010 SANT’OLCESE Genova - Italy
Tel.: +39 01073061
Fax: +39 0107306870/871
E-mail: [email protected] Web: www.controlli.eu
Globe Valves Actuators
MVE
APPLICATION AND USE
The New MVE is a
fl
exible electro-mechanical actuator for the
control of two and three way globe valves in:
• Heating and Cooling systems
• Air handling units
• District Heating plants
• Industrial Temperature Control systems.
The MVE can be controlled either by a proportional (modula-
ting) signal or by an increase/decrease (Floating) signal.
It is easy to mount and connect the actuator. Direct mounting
is possible to any CONTROLLI
fl
anged valve. Linkage kits are
available for CONTROLLI threaded valves as well as for valves
of other manufacturers.
The Actuator has a
fi
ne resolution (500 steps on the full stroke
range) for exacting
fl
uid control and it is able to self-calibrate
on a different stroke without the need of any user action (this
function is dip-switch selectable on the
fi
eld).
The MVE has intelligent behavior and alarm functionality in
case of unexpected operation, feedback of alarms to the user is
provided by LEDs (Green and Red) on the control board.
OPERATION
The Actuator translates the control signal (modulating or 3 point
fl
oating) from the controller into a valve position. A modern bru-
shless DC motor in the actuator drive a gear train and a worm
gear – screw jack mechanism convert the motor revolutions
into accurate and repeatable linear movements.
Control Signal
The MVE can be controlled by one of 2 main control types.
• 3 point
fl
oating ;
• Modulating (or proportional) signal with
fi
led selectable range
(e.g. 0..10Vdc, 2..10Vdc, 0..5/5..10Vdc and 4-20mA).
Manual Operation
There is a manual operation handle on the Actuator. When it is
lowered, the power supply to the motor power stage circuitry is
cut and the motor stops. The actuator can be operated manual-
ly and the valve positioned accordingly. The manual operation
level latches in position until it is raised again and power returns
to the board and motor. When the manual override is engaged
the green and the red LED are ON.
Manual operation lever can also be used as sort of re-set fun-
ction after any dipswitch setting or alarm function occurrence.
The actuator is supplied with the manual operator lowered.
Position Feedback
The MVE utilizes a 2-10V position feedback, where 2V indica-
tes a closed valve with a fully retracted actuator.
Calibration
The MVE has both Auto and Manual Stroke Calibration, Sw.7.
In factory delivery the auto stroke calibration is enabled – ma-
nual calibration is not necessary unless maintenance is requi-
red on the valve or certain alarm functions are desired.
End Point Auxiliary Switches (with accessory DMVE)
End point switches change over when the valve is fully open
or closed. End point switches can be utilized to indicate val-
ve stroke end positions and for relay control of additional plant
equipment. End point switches will also allow the actuators to
be controlled in sequence, thus providing a high system turn
down ratio of the plant. The auxiliary switch position according
to the valve position is shown in the picture below.
Diagnostic
The actuator is provided with a self diagnostic algorithm able to
detect faulty conditions:
• stroke out of range 5-60 mm;
• unexpected stall condition (e.g. valve stuck);
• missing expected stall condition(e.g. link loose);
• voltage supply out of range.
These faulty conditions are signaled via the Green and Red
LED on the PCBA blinking accordingly (see Diagnostic – Alarm
Function Table).
1st
Issue
rev.
a
04/12
1 DBL388e
Model
Force (N)
Power
supply
Description
MVE506
600
24 Vac/Vdc long yoke, modulating/
fl
oating control
MVE510
1000
24 Vac/Vdc long yoke, modulating/
fl
oating control
MVE515
1500
24 Vac/Vdc long yoke, modulating/
fl
oating control
MVE506S
600
24 Vac/Vdc short yoke, modulating/
fl
oating control
MVE510S 1000
24 Vac/Vdc short yoke, modulating/
fl
oating control
MVE515S
1500
24 Vac/Vdc short yoke, modulating/
fl
oating control
