Samson 3321CT, Mounting And Operating Instructions

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EB 8115 EN 9-5
Servicing
9.4.1 Replacing the gasket
1. Undo the screws (10) on the valve bon -
net (7).
2. Lift the actuator, flange (14), valve bon-
net (7) and plug with plug stem (3) off
the body (1).
3. Remove the gasket (13). Carefully clean
the sealing faces in the valve body (1)
and on the valve bonnet (7).
4. Insert a new gasket (13) into the body.
5. Carefully place the actuator, valve bon-
net (7), flange (14) and plug with plug
stem (3) onto the body (1).
Make sure that the marking on the valve
bonnet are aligned with the front of the
valve (see Fig. 9-2).
6. Apply a suitable lubricant to the screws
(10).
7. Firmly press the plug (3) into the seat (2),
while fastening down the valve bonnet
(7) with the screws (10).Firmly press the
plug (3) into the seat (2). Gradually tight-
en the screws in a crisscross pattern. Ob-
serve tightening torques.
9.4.2 Replacing the packing
1. Undo the screws (10) on the valve bon -
net (7).
2. Lift the actuator, flange (14), valve bon-
net (7) and plug with plug stem (3) off
the body (1).
3. Replace the gasket (see section 9.4.1)
4. Unscrew the valve bonnet (7) from the
actuator base.
5. Unscrew the plug stem (3) from the actu-
ator stem.
6. Pull the plug with plug stem (3) out of the
valve bonnet (7).
7. Pull the entire packing out of the packing
chamber using a suitable tool.
8. Renew damaged parts. Clean the pack-
ing chamber thoroughly.
9. Apply a suitable lubricant to all the pack-
ing parts and to the plug stem (3).
10. Make sure that the guide bushing (4)
and spacer (9) are seated correctly in the
valve bonnet (7).
11. Insert the packing parts into the packing
chamber. Make sure to observe the prop-
er order (see Fig. 9-3 or Fig. 9-5).
12. Place the retaining ring (12) on the pack-
ing parts.
13. Use a suitable tool to press the packing
together until the retaining ring (12) is
seated in the groove of the valve bonnet
(7).
14. Place the retaining washer (11) from
above onto the plug stem (3). Observe
the proper alignment (see Fig. 9-4).
15. Carefully slide the plug stem (3) into the
valve bonnet (7).
16. Apply a suitable thread-locking fluid to
the female thread of the actuator stem.
17. Screw the plug stem (3) into the actuator
stem. Observe tightening torques.
18. Apply a suitable lubricant to the thread
of the valve bonnet (7).