Gemu 653, Maintenance & Operating Manuallines

Page: 9 / 15

VMS - Rev.02 26.04.2004 9
Torque Guidelines
Seat
Thread Units
Min Max Min Max
8
1/2"
4x M 4
[Nm]
0.6 0.8 0.8 1.2
22 x 22
[lbf-in] 5.3 7.1 7.1 10.6
10
3/4"
4x M 5 [Nm] 3 4 3.5 4.5
44 x 39
[lbf-in] 27 35 30 40
25
1"
4x M 8 [Nm] 6.5 8 13 16
54 x 46
[lbf-in] 58 72 115 140
40
1 1/2"
4x M10 [Nm] 12 14 24 28
70 x 65
[lbf-in] 107 125 215 250
50
2"
4x M12 [Nm] 17 19 34 38
82 x 78
[lbf-in] 152 169 300 340
80
3"
4x M16 [Nm] 50 60 100 120
127 x 114
[lbf-in] 445 534 890 1070
100
4"
8x M12
[Nm]
40 50 80 100
LK 194
[lbf-in] 356 445 700 890
125
5"
8x M16 [Nm] 50.0 60 100 120
[lbf-in] 445 534 890 1070
150
6"
8x M16 [Nm] 50 60 100 120
[lbf-in] 445 534 890 1070
EPDM
PTFE
Standard values for sealing material
Seat Actuation Type
8
601, 602, 603, 605, 618, 640, 641, 650
10
612, 615, 618, 625, 640, 650, 653, 654
620, 640, 650, 653, 654, 671, 672, 673
675, 687, 688, 695, 698
25-150
The specified torques are standard values for
A2 70 screws with light PTFE film.
After repeated maintenance cycles , the
torques necessary for tightening may increase
significantly.
As diaphragms may set in the course of time,
the nuts and bolts on the body should be
checked for tightness and re-tightened if
necessary before commissioning the valve (and
certainly after the
first sterilization cycle ).
The fasteners must be tightened diagonally
and uniformly. Over-tightening of the screws
will damage the diaphragm.