Annex; Tightening Torques; Tightening Torques For Type 3349 Valve With Type 3271 Or Type 3277 Actuator; Tightening Torques For Type 3349 Valve With Type 3379 Actuator - Samson 3349 Mounting And Operating Instructions

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
DN NPS
6 to 25 ¼ to 1
(micro- (micro-
flow flow
valve) valve)
15 to 25 ½ to 1
1¼ to
32 to 65
2½
80 to
3 to 4
100
Table 15-2: Tightening torques for connec-
tion of valve body and bonnet
Valve size
Tightening torque for screws
DN NPS
6 to 25 ¼ to 1
(micro- (micro-
flow flow
valve) valve)
15 to 25 ½ to 1
1¼ to
32 to 65
2½
EB 8048-2 EN
Tightening torque for plug
(2) and plug stem (3) in Nm
4
16
135
230
(34) in Nm
4
16
40
Valve size
DN NPS
80 to
3 to 4
100
NOTICE
!
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
DN NPS
6 to 25 ¼ to 1
(micro- (micro-
flow flow
valve) valve)
15 to 25 ½ to 1
32 to 50 1¼ to 2
Tightening torque for screws
(34) in Nm
135
Tightening torque for plug
(2) and plug stem (3) in Nm
4
16
135
Annex
15-1