Flowserve 13 Series - 10 Technical Data; Gland Nut Torque; Stem Assembly Torque; Connector Bolt Torque

Worcester 13 / 14 Series User Instruction – WCENIM0002-01
Page 11 of 13
10 Technical Data
10.1 Gland nut torque
The torque to be applied to the gland nut to ensure the correct amount of stem
sealing.
10.2 Stem assembly torque
The torque required to operate the assembled stem before the ball and seats are
fitted to the valve.
10.3 Connector bolt torque
The torque required to give a metal-to-metal contact between the body and the
inner surface of the body connectors.
10.4 Torque data
Table 2 Torque Data
Size
(Reduced
Bore)
Size
(Full
Bore)
Gland nut
– graphite
build (Nm)
Gland
nut – PTFE
build
(Nm)
Stem
assembly
(Nm)
Connector
bolts (Nm)
Connector
cap
screws
(Nm)
DN 20
DN 15
5 – 7
6 – 9
3 – 5
13 – 15
25 – 29
DN 25
DN 20
6 – 10
8 – 12
4 – 6
24 – 28
27 – 31
DN 40
DN 32
8 – 12
13 – 18
6 – 8
33 – 37
35 – 39
DN 50
DN 40
8 – 12
13 – 18
6 – 8
38 – 42
49 – 53