Samson 3349, Mounting And Operating Instructions

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EB 8048-2 EN 15-1
Annex
15 Annex
15.1 Tightening torques
15.1.1 Tightening torques for
Type 3349 Valve with
Type 3271 or Type 3277
Actuator
Table 15-1: Tightening torques for connec-
tion of plug and plug stem
Valve size
Tightening torque for plug
(2) and plug stem (3) in Nm
DN NPS
6 to 25
(micro-
flow
valve)
¼ to 1
(micro-
flow
valve)
4
15 to 25 ½ to 1 16
32 to 65 1¼ to
2½
135
80 to
100
3 to 4 230
Table 15-2: Tightening torques for connec-
tion of valve body and bonnet
Valve size
Tightening torque for screws
(34) in Nm
DN NPS
6 to 25
(micro-
flow
valve)
¼ to 1
(micro-
flow
valve)
4
15 to 25 ½ to 1 16
32 to 65 1¼ to
2½
40
Valve size
Tightening torque for screws
(34) in Nm
DN NPS
80 to
100
3 to 4 135
Risk of damage to the body screws due to
excessively high tightening torques.
Older valve versions have body screws that
are no longer suitable for the specified tight
-
ening torques.
Î
Make sure that the new screws are used
for all versions.
Î
Contact our after-sales service for further
information.
15.1.2 Tightening torques for
Type 3349 Valve with
Type 3379 Actuator
Table 15-3: Tightening torques for connec-
tion of plug and plug stem
Valve size
Tightening torque for plug
(2) and plug stem (3) in Nm
DN NPS
6 to 25
(micro-
flow
valve)
¼ to 1
(micro-
flow
valve)
4
15 to 25 ½ to 1 16
32 to 50 1¼ to 2 135
NOTICE !