EB 3131 EN
33
Servicing
7.1
Cleaning and replacing the
plug
Removal
1. Put the regulator out of operation (see
section 9.1).
2. For
Type 46-7 and Type 47-1
,
completely relieve the tension from the
set point spring (8) by turning the set
point adjuster (10) or manual adjuster
(19) counterclockwise (
).
3. Unscrew the screws (15) and lift the actu-
ator off the valve body.
4. Pull the valve spring (5), if installed, out
of the body.
5.
DN 15 to 25:
unscrew and pull out the
guide nipple with plug (3) using a socket
wrench (order no. 1280-3001).
DN 32 to 50:
unscrew the stopper (25)
at the plug and pull out the plug.
6. Clean the seat and plug thoroughly.
Check the control lines for any blockag-
es. If the plug is damaged, replace the
entire plug with a new one.
Installation
1. Insert cleaned or new plug.
2.
DN 15 to 25:
tighten the guide nipple
with plug (3) using a socket wrench (or-
der no. 1280-3001). Observe the tight-
ening torques specified in section 7.3.
DN 32 to 50:
insert the plug followed by
the stopper (25) of the plug. Observe the
tightening torques specified in sec
-
3. Insert the valve spring (5), if installed, in-
to the body.
4. Place the actuator on the body. Tighten
screws (15). Observe the tightening
torques specified in section 7.3.
5. Fasten the control lines (11, 12).
6. Install the regulator into the pipeline.
7. Fasten the external control lines (13, 14).
8. Put the regulator into operation (see sec-