pin only
weld
do NOT
weld
1
2
4
VI.JA.G2.02
© Danfoss 11/2006
DH-SMT/SI
Instructions
Pilot-controlled PCVQ DN 100 - DN 250 (PN 16, PN 25)
6
Assembly
6.1 Prior to Assembly:
Depressurized system before any
assembly work !
CAUTION!
• Clean pipeline system.
• Install strainer in front of the controller.
• Install shut-off units in front of and behind
the controller.
6.2 Installation Position, Installation Place
• Installation is only permitted in horizontal
pipelines with the actuators hanging in a
downward position.
• The controller may be installed in the
supply as well as in the return line.
6.3 When installing:
• Observe direction of flow.
• Design with welded ends:
• Loads on the valve body and the throttle
element by the pipes are not permitted.
6.4 Impulse Tube Installation
See installation scheme, section 6.6.
For CU pipes Ø 10 × 1, insert sockets
1
on both
sides.
Care for correct position of the cutting rings
2
.
6.5 Insulation
The diaphragm actuators must not be insulated
when insulating system parts.
