HWMA2 USER INSTRUCTIONS ENGLISH - 06/16
Page 26 of 39
6.4 Recommended spares
Spares Recommended
Part
Start up
Normal Maintenance
No. of identical pumps
1 - 3
4 - 6
7+
1 - 3
4 - 6
7 - 9
10+
Case
1
Head (case cover and stuffing box)
1
Diffuser
1
Motor
1
Shaft (w/key)
1
1
2
1
Impeller
1
1
2
3
Mechanical seal complete (Cartridge)
1
2
3
1
2
3
3
Shaft sleeve and stage bushing (set)
1
2
3
1
2
3
3
Gaskets, O-rings (set)
1
2
3
1
2
3
3
6.5 Tightening torque & tightening sequence
6.5.1 Tightening torque
Tightening Torque M
A
Nm (lbf.ft)
Carbon Steel
Size of
Screw
A193 B7M,
A320 L7M
(NACE)
A193 B7,
A320 L7,
8.8
3.6
4.6
10.9
[Nm]
[lbf.ft]
[Nm]
[lbf.ft]
[Nm]
[lbf.ft]
[Nm]
[lbf.ft]
[Nm]
[lbf.ft]
M4
4.2
(3.1)
3
(2.2)
0.8
(0.6)
1.1
(0.8)
4.6
(3.4)
M5
8.3
(6.1)
5.9
(4.4)
1.6
(1.2)
2.2
(1.6)
8.6
(6.3)
M6
14.2
(10.5)
10.1
(7.4)
2.8
(2.1)
3.7
(2.7)
14.9
(11)
M8
35
(26)
24.6
(18.1)
6.8
(5)
9.1
(6.7)
36
(27)
M10
68
(50)
48
(35)
13.7
(10.1)
18.3
(13)
71
(52)
M12
118
(87)
84
(62)
23
(17)
31
(23)
123
(91)
M14
187
(138)
133
(98)
37
(27)
50
(37)
195
(144)
M16
290
(214)
206
(152)
57
(42)
76
(56)
302
(223)
M18
335
(247)
295
(218)
80
(59)
106
(78)
421
(311)
M20
472
(348)
415
(306)
112
(83)
150
(111)
592
(437)
M22
644
(475)
567
(418)
151
(111)
202
(149)
807
(595)
M24
811
(598)
714
(527)
193
(142)
257
(190)
1017
(750)
M27
1193
(880)
1050
(774)
284
(209)
379
(280)
1496
(1103)
M30
1614
(1190)
1420
(1047)
386
(285)
515
(380)
2033
(1500)
M33
2191
(1616)
1928
(1422)
523
(386)
697
(514)
2747
(2026)
M36
2820
(2080)
2482
(1831)
672
(496)
897
(662)
3535
(2607)
M39
3645
(2689)
3208
(2366)
870
(642)
1160
(856)
4569
(3370)
M42
3920
(2891)
3980
(2936)
1146
(845)
1447
(1067)
5670
(4182)
M45
4875
(3596)
4950
(3651)
1425
(1051)
1800
(1328)
7050
(5200)
M48
5899
(4351)
5990
(4418)
1724
(1272)
2178
(1606)
8530
(6292)