Samson EB 8048-3, Монтаж и эксплуатация

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42 EB 8048-2/-3 EN
Servicing
actuator stem. Observe tightening
torques.
25. Remove locking pin.
26. Place the actuator and valve bonnet (20)
together with the plug stem (3), plug (2),
and diaphragm (24) onto the body (1).
27. Apply a suitable lubricant to the hex
screws (34).
28. Tighten the hex screws (34) on the flange
(20) gradually in a crisscross pattern un-
til the valve bonnet touches the body
flange.
Greater deformation forces are required for
new diaphragms (in comparison to already
installed diaphragms). We recommend
shaping the new diaphragms beforehand us
-
ing conventional hex screws:
−
Tighten the conventional hex screws as de -
scribed in step 28.
−
Replace the conventional hex screws with
the existing hex screws (34).
−
Tighten the hex screws (34) as described in
step 28.
29. For version with Type 3724 Positioner:
initialize the positioner (
u
EB 8395).
7.3 Checking the concentricity
of the plug to the plug stem
Before mounting the plug, the concentricity
of the plug to the plug stem must be checked.
1. Clamp the plug stem into a suitable
clamping device.
2. Check the concentricity of the plug to the
plug stem. Observe the values listed in
Table 6 and Table 7.
3. If the concentricity deviates, use a suit-
able tool (e.g. plastic hammer) and hit
the plug until concentricity is achieved.
Instead of aligning the plug, the assembly
(consisting of plug stem, diaphragm, and
plug) can be ordered from SAMSON.
Table 6: Concentricity of the plug · Version
with Type 3271 or Type 3277 Actuator
Valve size
Max. deviation in
mm
DN NPS
8 to 25 ¼ to 1 0.01
15 to 25 ½ to 1 0.01
32 to 65 1¼ to 2½ 0.04
80 and 100 3 and 4 0.05
Table 7: Concentricity of the plug · Version
with Type 3379 Actuator
Valve size
Max. deviation in
mm
DN NPS
8 to 25 ¼ to 1 0.01
15 to 25 ½ to 1 0.01
32 to 50 1¼ to 2 0.04
Note
Tip