Replacement Of Trim Valve Vfg 21; Dismounting, Mounting Actuator Ava, Sava; Replacement Of Trim Valve Ava, Sava - Danfoss PCVA Instructions Manual

Instructions
9 Replacement of Valve,
Actuator, Trims
14 | © Danfoss | 2016.06
PCVA, PCVSAA
9.2 Replacement of Trim Valve VFG2
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
Installing the trim:
Mounitng is carried out in reverse order.
Torque hexagon head cap screws 2:
DN Torque
100-125 180 Nm
9.3 Dismounting, Mounting
4
Dismounting
1. Dismount impulse tubes.
2. Loosen union nut 1.
3. Remove actuator.
Mounting
1. Place actuator at the valve and align, observe
position of the impulse tube connections.
2. Screw on union nut 1 and tighten,
torque 100 Nm.

9.4 Replacement of Trim Valve AVA, SAVA

5
Wrench
SW 30
Dismounting
1. Unscrew actuator (see above).
2. Unscrew trim 2.
DN 25: with pipe tongs, wrap gum strips
around the trim DN 40: with wrench SW 55
3. Pull out trim.
Mounting
Mounting is carried out in reverse order. Only
tighten with low torque, sealing is made with O
rings.
Actuator AVA, SAVA
2
AVA DN 25
2
AVA DN 40
1
VI.JA.D2.5B