Replacement Of Valve, Actuator, Trim; Dismounting And Mounting Actuator And Valve Of The Valve Unit - Danfoss PCVD Instructions Manual

Instructions
9 Replacement of Valve,
Actuator, Trim
VI.JA.C3.5B
PCVD, PCVSAD
9.1 Dismounting and Mounting Actuator and
Valve of the Valve Unit
Note:
The springs 1 in the actuator are pre-stressed.
Therefore, the actuator must be pushed upwards
to be dismounted. You need a second person to
do this.
Valve unit DN 100 –125
2
5
Valve stem 3 and the stem of the actuator 4 are
not screwed to eachother.
Dismounting
1. Dismount impulse tubes.
2. Support actuator below or by a second
person as the springs 1 are pre-stressed.
3. Loosen union nut 2.
4. Remove actuator.
Prior to assembly check cone 5 !
5
grease
1. Clean cone prior to mounting.
2. Check O rings for damages, in case of
damages, replace cone (see Spare Parts).
3. Grease cone with high-performance fitting
component: BARRIERTA L55/3 HV
(see Spare Parts).
Mounting
1. Place actuator at the valve and push upwards.
2. Screw on union nut 2.
3. Align actuator, observe position of impulse
tube connections.
4. Tighten union nut 1, max. torque 100 Nm.
Valve unit DN 150–250
3
SW 46
The stem of the actuator 4 is screwed into the
valve stem 3.
Dismounting
1. Dismount impulse tubes.
4 2. Completely loosen union nut 1.
1
 The actuator hangs on the screwed-in stem 4.
3. Screw the stem of the actuators 4 out of the
valve stem 3 by turning the actuator to the
left.
Mounting
1. Place actuator at the valve and push upward
to press the spring package in the actuator
together (second person necessary).
2. Carefully turn actuator to the right.
By this, carefully screw in the stem of the
actuator into the valve stem to its stop.
Cone
3. Align actuator, observe position of the control
lines connections.
4. Tighten union nut 1, torque 100 Nm.
SW 46
1
Turn
actuator
to the left
The actuator weights approx.
20 kg. In addition, an internal
spring package is pre-stressed.
Secure against dropping down
before unscrewing.
Then, return the actuator by
approx. 1 rotation (to the left)
© Danfoss | 2016.05 | 13
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