5 piping – Flowserve MEN User Manual
Page 19
MEN USER INSTRUCTIONS ENGLISH 71576288 - 02/13
Page 19 of 36
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Pump and motor mounted on individual base
plates:
Machines are (or must be) first mounted on their
own base plate in the workshop. Once the pump is
set, it will be regarded as the fixed piece. Any
alignment necessary shall be carried out on the
motor.
Never connect the electric motor
before the setting has been completely finished.
4.5 Piping
The user must verify that the equipment is
isolated from any external sources of vibration.
Protective covers are fitted to the
pipe connections to prevent foreign bodies entering
during transportation and installation. Ensure that
these covers are removed from the pump before
connecting any pipes.
4.5.1 Suction and discharge piping
The dimensions of the pipes do not directly depend
on suction and discharge diameters of the pump:
a) First, choose a flow speed < 2 m/s (7 ft/s) at
suction, and about 3 m/s (10 ft/s) at discharge.
b) Take into account the available NPSH, which
must be superior to the required NPSH of the
pump.
Never use pump as a support for
piping.
Do not mount expansion joints in
such a way that their force, due to internal pressure,
may act on the pump flange.
Maximum forces and moments allowed on the pump
flanges vary with the pump size and type. These
external strains may cause misalignment, hot
bearings, worn couplings, vibrations and the
possible failure of the pump casing. When designing
the pipes (§ 4.5.2.1, § 4.5.2.2, § 4.5.3.1) take
necessary precautions in order not to exceed
maximum allowed strains.
Forces and moments applied to the pump flanges
must never exceed the values shown in the table
below:
MEN
Pump
Suction DNA
Discharge DNR
Forces
Moments
mm
in
mm
in
Fv max
Fh max
ΣΣΣΣ
Mt max
daN
lbf
daN
lbf
m.daN
lbf.ft
50-32-125
50
2.0
32
1.25
125
281
95
214
20
148
50-32-160
50
2.0
32
1.25
125
281
95
214
17
125
50-32-200
50
2.0
32
1.25
125
281
95
214
17
125
50-32-200L
50
2.0
32
1.25
125
281
95
214
17
125
65-40-125
65
2.5
40
1.5
135
304
100
225
22
162
65-40-160
65
2.5
40
1.5
135
304
100
225
22
162
65-40-200L
65
2.5
40
1.5
135
304
100
225
20
148
65-40-250
65
2.5
40
1.5
135
304
100
225
25
185
65-40-250L
65
2.5
40
1.5
135
304
100
225
25
185
65-50-125
65
2.5
50
2.0
135
304
100
225
22
162
65-50-160
65
2.5
50
2.0
135
304
100
225
22
162
65-50-200L
65
2.5
50
2.0
135
304
100
225
20
148
65-50-250L
65
2.5
50
2.0
135
304
100
225
25
185
80-65-125
80
3.0
65
2.5
145
326
105
236
27
199
80-65-160
80
3.0
65
2.5
145
326
105
236
27
199
80-65-200L
80
3.0
65
2.5
145
326
105
236
27
199
80-65-250L
80
3.0
65
2.5
145
326
105
236
27
199
80-65-315
80
3.0
65
2.5
145
326
105
236
27
199
100-80-160
100
4.0
80
3.0
180
405
125
281
47
347
100-80-200L
100
4.0
80
3.0
180
405
125
281
47
347
100-80-250L
100
4.0
80
3.0
180
405
125
281
47
347
100-80-315
100
4.0
80
3.0
180
405
125
281
47
347
125-100-200L
125
5.0
100
4.0
320
720
190
427
95
701
125-100-250L
125
5.0
100
4.0
330
742
200
450
102
753
125-100-315
125
5.0
100
4.0
310
697
185
416
92
679
125-100-315L
125
5.0
100
4.0
310
697
185
416
92
679
125-100-400
125
5.0
100
4.0
285
641
170
382
82
605
125-100-400L
125
5.0
100
4.0
285
641
170
382
82
605
150-125-250L
150
6.0
125
5.0
450
1012
290
652
155
1144
150-125-315L
150
6.0
125
5.0
415
934
260
585
140
1033
150-125-400L
150
6.0
125
5.0
410
922
255
574
137
1011
200-150-315L
200
8.0
150
6.0
500
1125
325
731
175
1292
200-150-400L
200
8.0
150
6.0
500
1125
325
731
175
1292