Torque Values; Change The Oil - Xylem Flygt 3127 Installation, Operation And Maintenance Manual

6.2 Torque values

All screws and nuts must be lubricated to achieve correct tightening torque. Screws that
are screwed into stainless steel must have the threads coated with suitable lubricants to
prevent seizing.
If there is a question regarding the tightening torques, then contact a sales or authorized
service representative.
Screws and nuts
Table 1: Stainless steel, A2 and A4, torque Nm (ft-lbs)
M4 M5
50 1.0 2.0
(0.74) (1.5)
70, 80 2.7 5.4
(2) (4)
100 4.1 8.1
(3) (6)
Table 2: Steel, torque Nm (ft-lbs)
M4 M5
8.8 2.9 5.7
(2.1) (4.2)
10.9 4.0 8.1
(2.9) (6)
12.9 4.9 9.7
(3.6) (7.2)
Table 3: Brass, torque Nm (ft-lbs)
M5
2.7 (2.0)
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 above.

6.3 Change the oil

This image shows the plugs that are used to change the oil.
Flygt 3127 Installation, Operation, and Maintenance Manual
M6 M8 M10
3.0 8.0 15
(2.2) (5.9) (11)
9.0 22 44
(6.6) (16) (32)
14 34 66
(10) (25) (49)
M6 M8 M10
9.8 24 47
(7.2) (18) (35)
14 33 65
(10) (24) (48)
17 40 79
(13) (30) (58)
M8
11
(8.1)
M12 M16 M20
27 65 127
(20) (48) (93.7)
76 187 364
(56) (138) (268)
115 248 481
(84.8) (183) (355)
M12 M16 M20
81 194 385
(60) (143) (285)
114 277 541
(84) (204) (399)
136 333 649
(100) (245) (480)
M10
22
(16.2)
6 Maintenance
M24 M30
220 434
(162) (320)
629 1240
(464) (915)
— —
M24 M30
665 1310
(490) (966.2)
935 1840
(689) (1357)
1120 2210
(825.1) (1630)
43