Screws and nuts
Table 15: Stainless steel, A2 and A4, torque Nm (lbf·ft)
Property class
M4 M5 M6 M8 M10 M12 M16 M20 M24 M30
50 1.0
(0.74)
2.0
(1.5)
3.0
(2.2)
8.0
(5.9)
15
(11)
27
(20)
65
(48)
127
(93.7)
220
(162)
434
(320)
70, 80 2.7
(2)
5.4
(4)
9.0
(6.6)
22
(16)
44
(32)
76
(56)
187
(138)
364
(268)
629
(464)
1240
(915)
100 4.1
(3)
8.1
(6)
14
(10)
34
(25)
66
(49)
115
(84.8)
248
(183)
481
(355)
— —
Table 16: Steel, torque Nm (lbf·ft)
Property class
M4 M5 M6 M8 M10 M12 M16 M20 M24 M30
8.8 2.9
(2.1)
5.7
(4.2)
9.8
(7.2)
24
(18)
47
(35)
81
(60)
194
(143)
385
(285)
665
(490)
1310
(966.2)
10.9 4.0
(2.9)
8.1
(6)
14
(10)
33
(24)
65
(48)
114
(84)
277
(204)
541
(399)
935
(689)
1840
(1357)
12.9 4.9
(3.6)
9.7
(7.2)
17
(13)
40
(30)
79
(58)
136
(100)
333
(245)
649
(480)
1120
(825.1)
2210
(1630)
Table 17: Brass, torque Nm (lbf·ft)
M5 M8 M10
2.7 (2.0) 11
(8.1)
22
(16.2)
Hexagon screws with countersunk heads
For hexagon socket head screws with countersunk head, maximum torque for all property
classes must be 80% of the values for property class 8.8.
6.3
Check the temperature sensors
If the pump is connected to the MAS monitoring system, then it is recommended that the
sensors be checked in the MAS unit. Otherwise, use a multimeter.
The different types of temperature sensors are:
• Thermal switches
• PTC-thermistors
• Pt100
NOTICE:
Do not use a megger or other device applying a higher voltage than 2.5 V.
6 Maintenance
P7030, P7035, P7040 Installation, Operation, and Maintenance Manual 63
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