Replacing The Seat And Plug - Samson 45-1 Mounting And Operating Instructions

9.4 Replacing the seat and
plug
See Fig. 9-1 and Fig. 9-2.
Disassembly
1. Put the regulator out of operation (see
the 'Decommissioning' chapter).
2. For Type 45-4 and Type 45-2, complete-
ly relieve the tension from the set point
spring (10) by turning the set point ad-
juster (9) or manual adjuster (19) coun-
terclockwise ().
3. Unscrew the control lines (11, 12).
4. Unscrew and remove the screws (14)
and lift the actuator (7) off the valve
body (1).
5. Pull the valve spring (8.1), if installed,
out of the body.
6. DN 15 to 25: unscrew the guide nipple
of the plug (3.1) using a socket wrench
(order no. 1280-3001) and pull out the
plug (3).
DN 32 to 50 unscrew stopper (3.3) and
pull out the guide nipple (3.1) with plug
(3).
7. Thoroughly clean the seat and plug. If
the plug is damaged, replace the entire
plug with a new one.
8. Check the control lines (11, 12) and the
borehole in the body (13, Type 45-3 and
Type 45-4) for blockage. Clean, if neces-
sary.
EB 3124 EN
Installation
1. Insert cleaned or new plug.
2. DN 15 to 25: tighten the guide nipple
with plug (3.1) using a socket wrench
(order no. 1280-3001). Observe the
specified tightening torques (see section
'Tightening torques' in the Appendix).
DN 32 to 50: insert the plug (3) followed
by the stopper of the plug (3.3). Observe
the specified tightening torques (see sec-
tion 'Tightening torques' in the Appen-
dix).
3. Insert the valve spring (8.1), if installed,
into the body.
4. Place the actuator on the body. Tighten
screws (14). Observe the specified tight-
ening torques (see section 'Tightening
torques' in the Appendix).
5. Install the regulator into the pipeline.
6. Fasten the control lines (11, 12). Ob-
serve the specified tightening torques
(see section 'Tightening torques' in the
Appendix).
7. Put the regulator back into operation (see
the 'Start-up' chapter).
Servicing
9-5