Table of Contents
Advertisement
9.3 Service work
Î Before performing any service work,
preparations must be made to the regu-
lator (see section 9.1).
Î After all service work is completed, check
the regulator before putting it back into
operation (see the 'Testing the regulator'
section).
9.3.1
Replacing the seat and
plug
To replace seat and plug, contact SAM-
SON's After-sales Service.
Further information is available in Annex
('After-sales service').
9.3.2
Replacing the actuator's
operating diaphragm
Tip
The associated order number is written on
the actual operating diaphragm.
Î See Fig. 9-1 and Fig. 9-2
Removing the operating diaphragm
1. Put the regulator out of operation (see
the 'Decommissioning' section).
2. Unscrew the control line (11).
3. Unscrew the coupling nut (10) from the
valve (1) and remove the control thermo-
stat (20).
4. Remove the valve from the pipeline.
EB 3132-3 EN
5. Clamp the valve into a suitable fixture.
6. Unscrew nuts and bolts (7) from the actu-
ator (6). Remove the actuator case (6.3).
7. Lift the operating diaphragm unit (6.1)
together with the diaphragm off the
guide nipple with plug section (3).
Mounting the operating diaphragm
1. Place a new operating diaphragm unit
(6.1) on the guide nipple with plug sec-
tion (3).
2. Place on the actuator case (6.3).
3. Insert screws (7) and tighten gradually in
a crisscross pattern. Observe the speci-
fied tightening torques (see 'Tightening
torques' in Annex).
4. Install the valve into the pipeline. Ob-
serve the specified tightening torques
(see 'Tightening torques' in Annex).
5. Screw on the control line (17). Observe
the specified tightening torques (see
'Tightening torques' in Annex).
6. Fasten the control thermostat (20) on the
valve (1) with the coupling nut (10). Ob-
serve the specified tightening torques
(see 'Tightening torques' in Annex).
7. Put the regulator back into operation (see
the 'Start-up' section).
Servicing
9-5
Advertisement
Table of Contents
