Valve Actuators MVB
Rev. l 11/06 1 DIM001E
CONTROLLI
16010 SANT’OLCESE Genova - Italy
Tel.: +39 01073061 Fax: +39 0107306870/871
ISO 9000
CONTROLLI
MOUNTING INSTRUCTIONS
FOR MVB 36-52-56 ONLY
FIG. 2
N3133
The actuator can be mounted in any position for applica-
tions in which the fluid temperature is not higher than 120
°C, otherwise it should be mounted in horizontal position.
It is necessary to leave 10 cm. above and beside it, so as
to operate on the internal parts, on the terminal board for
the electric connections and for assembling-disassembling
operations.
2. VSB-VMB/VSBF-VMBF/VSBPM-VMBPM/
VSBPMF-VMBPMF VALVES ASSEMBLY
(Fig.1)
•Pull and turn counter-clockwise the manual knob 1until
the joint reaches the upper mechanical stop.
•For VSB-VMB/VSBF-VMBF: Pull out the knob 1 and
rotate clockwise (max 1/4 turn) until it enters the first
rest position.
•For VMBPM-VSBPM/VMBPMF-VSBPMF: Pull out the
knob 1and rotate clockwise (max 1/2 turn) until it en-
ters the second rest position.
•Make sure the plug reaches upper seat by lifting the
valve stem.
•If a spacer for high temperatures is needed, insert the
MVBHT accessory 4onto the valve neck.
•Position the actuator on the valve interposing the ring
nut 3between the stem and the mounting bracket.
•Rotate the actuator until the bracket rests on the valve
body.
•Tighten the ring nut 3 using the supplied spanner.
•Keeping the valve stem steady, force counter-clockwise
the lower hexagonal part of joint 2(which acts as a
locknut) until it detaches.
•Then screw clockwise the part which has been detached
so as to tighten it on the rest of the joint, thus blocking
the valve stem.
•Remove the back cover (opposite the knob).
•For MVB52/56 only, make sure that jumper SW2 is in A
position (Fig. 2).
•Supply the actuator between L1 and L2 terminals with Y
terminal disconnected.
•Wait the actuator to reach the lower stroke end.
•Connect the positive of the voltmeter to S2 terminal and
the negative to M.
•Rotate P1 trimmer until the voltmeter indicates 0 V.
FIG. 1
N4161
3. ACTUATOR STROKE CALIBRATION ONLY
FOR STROKES DIFFERENT FROM 16.5 mm
1. INSTALLATION
