Cleaning And Replacing The Seat And Plug - Samson 43-1 Mounting And Operating Instructions

Servicing
8.1 Cleaning and replacing the
seat and plug
Î See Fig. 4
NOTICE
!
Risk of regulator damage due to excessively
high or low tightening torques.
Observe the specified torques on tightening
regulator components. Excessively tightened
torques lead to parts wearing out quicker.
Parts that are too loose may cause leakage.
Observe the specified tightening torques.
NOTICE
!
Risk of damage to the facing of the seat and
plug due to incorrect service or repair.
Always replace both the seat and plug.
Note
SAMSON's After-sales Service can support
you concerning lubricant, tightening torques
and tools approved by SAMSON.
To change the plug and seat, a suitable plug
and seat wrench is needed (see section 8.4).
The special tools are available from
SAMSON.
Removing the seat and plug
1. Put the regulator out of operation (see
section 10.1).
2. Unscrew the coupling nut (15) and re-
move the control thermostat.
3. Remove the valve from the pipeline.
34
4. DN 15 to 25
Unscrew the plug (3) using the plug
wrench.
DN 32 to 50
Unscrew the plug assembly (3.1) using
the plug wrench.
5. Remove the seal (3.2).
6. Thoroughly clean the seat and plug. If
the plug or balancing bellows/piston is
damaged, replace the entire unit with a
new one.
7. Unscrew the seat (2) using a seat wrench
if the seat facing is damaged.
Mounting the seat/plug
1. Screw in the seat (2) using a seat
wrench. Observe the tightening torques
specified in section 8.3.
2. Renew the seal (3.2) and insert it into the
body.
3. DN 15 to 25
Screw in the plug (3) using the plug
wrench. Observe the tightening torques
specified in section 8.3.
DN 32 to 50
Screw in the plug assembly (3.1). Ob-
serve the tightening torques specified in
section 8.3.
4. Install the valve into the pipeline.
5. Fasten the control thermostat on the valve
using the coupling nut (15).
6. Put the regulator into operation (see sec-
tion 6.4).
EB 2171 EN