Samson 3349, Mounting And Operating Instructions

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EB 8048-2 EN 9-5
Servicing
springs, a certain signal pressure must be
applied to the actuator (see associated actu
-
ator documentation). Afterwards, the signal
pressure must be removed and the air supply
disconnected again and locked.
9.5.1 Replacing the packing
(micro-flow valve ver -
sion only)
19
20.1
5.2
15
23
3
41
Fig. 9-1: Packing (with Type 3271/3277 Actu -
ator)
1. Remove the actuator from the valve. See
associated actuator documentation.
2. Undo the screws (34).
3. Lift the valve bonnet (20.1) together with
the plug stem (3), plug (2) and dia-
phragm (24) off the body (1).
4. Unscrew the threaded bushing (5.2).
5. Pull the plug (2) with plug stem (3) and
diaphragm (24) out of the valve bonnet
(20.1).
6. Pull the entire packing parts (15, 19, 23)
out of the packing chamber using a suit-
able tool. Renew the damaged parts and
carefully clean the packing chamber.
2
24
3
20
5.1
36
40
1
2
1
24
3
20.1
20.2
5.2
23
15
19
41
36
39
Fig. 9-2: Type 3349 Valve with Type 3271 Pneumatic Actuator
Micro-flow valve version
with packing
Legend for Fig. 9-1 to Fig. 9-4
1 Body
2 Plug
3 Plug stem
5.1 Stem seal
5.2 Threaded bushing
6.1 Threaded pin
6.2 Retaining washer
15 Spring
19 Washer
20 Standard yoke for Type 3271/3277
Actuator
20.1 Valve bonnet for micro-flow valve
version with Type 3271/3277 Actuator
20.2 Yoke for micro-flow valve version with
Type 3271/3277 Actuator
23 Packing
24 Diaphragm
34 Screw
36 Screw plug or nipple
39 Gasket
40 Pipe
41 Bearing