Table of Contents
Advertisement
Installation
Î Make sure that the regulator is open
while filling the plant. To proceed, turn
the set point adjuster (9) or manual ad-
juster (19) counterclockwise () as far as
it will go.
If the test pressure of the valve is higher
than the specified maximum permissible op-
erating pressure of the diaphragm actuator:
Î Depressurize the plant.
Î Remove the control line mounted on site.
Close any control line connection in the
plant by closing the installed shut-off
valve or inserting a blanking plug.
Î Install a suitable length of pipe into the
pipeline in place of the regulator before
performing the pressure test.
5-8
5.5 Insulation
To insulate cold systems, we recommend first
filling the plant and carefully rinsing it. The
regulator must not yet be insulated at this
stage.
1. Start up the plant and adjust the set point
(see the 'Start-up' chapter).
2. Shut down the plant again and let it heat
up until the condensation water has
dried off.
3. Insulate the regulator and pipes convey-
ing the process medium using insulation
material with a water vapor barrier. Use
a stable sleeve to protect the external set
point springs against touching or friction
and include it in the insulation. If a con-
trol line is to be routed through the insu-
lation, special care must be taken with
the sealing since slight changes in shape
may occur. The insulation thickness de-
pends on the medium temperature and
the ambient conditions. 50 mm is a typi-
cal thickness.
NOTICE
!
Risk of regulator damage due to incorrect
insulation.
Î The actuator must be insulated for medi-
um temperatures below 0 °C.
Î The regulator must not be insulated for
medium temperatures above 80 °C.
EB 3124 EN
Advertisement
Table of Contents
