Replacement Of Trim Valve Vfq 21 - Danfoss Pilot-controlled PCVQ Instructions Manual

Instructions
9 Replacement of Valve,
Actuator, Trims
16
Pilot-controlled PCVQ DN 100 - DN 250 (PN 16, PN 25)

9.2 Replacement of Trim Valve VFQ 21

The trim can be replaced by qualified personnel
up to DN 125. From DN 150 replacement should
be carried out by the Danfoss service personnel.
Removing the trim:
Valves DN 100–125
2
3
1
1. Dismount actuator 1
(see section 9.1).
2. Unscrew hexagon head cap screw 2.
3. Remove bonnet 3.
4. Take out trim 4.
Prior to installation:
Clean sealing surfaces 5 and socket 6, grease
sealing surfaces with antiseize graphite
petroleum.
6
VI.JA.G2.02
© Danfoss 11/2006
Installing the trim:
Mounitng is carried out in reverse order.
Torque hexagon head cap screws 2:
100 - 125
4
5
DN Torque
180 Nm
Wrench
SW 30
DH-SMT/SI