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Instructions
9
Replacement of Valve,
Actuator, Trims
14
Pilot-controlled PCVQ DN 100 - DN 250 (PN 16, PN 25)
9.1 Dismounting and Mounting Actuator and
Valve
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.
VI.JA.G2.02
© Danfoss 11/2006
Prior to assembly check cone 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
3
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.
4
1
5
Cone
DH-SMT/SI
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