SOMAS MTV - Fastening Torque for Flanges Valve Body

19
Original document - Mi-205 EN Edition: 2021-04
* DN80 only for MTV
Tab.4-3 Fastening torque for flanges valve body
4.2 Fastening torque for bolts
4.2.1 Fastening torque for flanges valve body
DN PN/Class Screw Torque
(Nm)
1
DN PN/Class Screw Torque
(Nm)
1
Dim. Quantity Dim. Quantity
80* 10, 16, 25
/150
M16
5/8“
8
4
65
120
300 10
16
25
/150
M20
M24
M27
7/8“
12
12
16
12
160
180
205
230
100 10,16
25
/150
M16
M20
5/8“
8
8
8
80
95
70
350 10
16
25
/150
M20
M24
M30
1“
16
16
16
12
215
235
340
280
125 10,16
25
/150
M16
M24
3/4“
8
8
8
90
110
110
400 10
16
25
/150
M24
M27
M33
1“
16
16
16
16
240
300
445
300
150 10,16
25
/150
M20
M24
3/4“
8
8
8
120
140
130
450 10
16
25
/150
M24
M27
M33
1 1/8”
20
20
20
16
210
300
395
405
200 10
16
25
/150
M20
M20
M24
3/4“
8
12
12
8
175
120
140
180
500 10
16
25
/150
M24
M30
M33
1 1/8“
20
20
20
20
245
410
480
355
250 10
16
25
/150
M20
M24
M27
7/8“
12
12
12
12
140
150
200
170
1
The information in the table refers to lubricated bolts. The correction factor for new, unlubricated bolts is 1.5.
Tighten the bolts alternately until the correct tightening torque is reached.
Tightening torque applies to flat gaskets corresponding to non-reinforced and reinforced graphite according to
EN 12516-2: 2014 with m-factor according to ASME 2.0 to 2.5. Maximum thickness for gasket: 2.0 mm. Tightening
torque must not be exceeded, because then the functionality of the valve can be compromised. Tightening
torques in Nm are designed for gaskets according to EN 1514-1, ASME B16.21 and counter flanges according to
EN 1092-1, EN 1759-1, ASME B16.47.