Flowserve NM Uživatelský manuál stáhnout pdf (Strana 16)

NM USER INSTRUCTIONS ENGLISH 71576289 - 11/09

Page 16 of 48

The alignment will be definitive only

after pipework connection (see § 4.5.1).

If necessary, improve the machine alignment:

→

Complete unit mounted on common base plate:

The machines are first aligned accurately in our

workshops. Usually, any misalignment observed on-

site is due to a wrong adjustment under the base

plate (disturbed during transport or because of

forces exerted by the pipework). It is only necessary

to rectify the adjustment under base plate. If it

proves to be insufficient, modify the motor and the

pipeworks adjustment.

→

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 pipework

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 at suction,

and about 3 m/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:

Forces (daN) Moments (m.daN)

Pipes

layout

flanges

∑

∑∑

∑ F

∑

∑∑

∑ M

32 30 40 35 60 23 27 34 49

40 30 40 35 60 23 27 34 49

40 50 45 80 27 30 37 54

50 68 58 102

30 33 40 60

80 60 75 70 120

32 36 44 65

100 80 100

90 160

36 41 50 74

125 100

125

110

200

44 52 63 92

150 120

150

135

240

53 62 75 110

200 162

200

180

314

69 79 97 144

250 200

250

224

390

86 99 121

180

300 242

300

269

470

129

148

182

267

350 300

375

336

586

192

221

270

400

Vertical pipework

perpendicular

to the shaft

450 363

450

403

703

255

294

359

528

32 40 30 35 60 23 27 34 49

40 40 30 35 60 23 27 34 49

50 50 40 45 80 27 30 37 54

68 50 58 102

30 33 40 60

80 75 60 70 120

32 36 44 65

100 100

80 90 160

36 41 50 74

125 125

100

110

200

44 52 63 92

150 150

120

135

240

53 62 75 110

200 200

162

180

314

69 79 97 144

250 250

200

225

390

86 99 121

180

300 300

242

269

470

129

148

182

267

350 375

300

336

586

192

221

270

400

Horizontal pipework

perpendicular

to the shaft

450 450

363

403

703

255

294

359

528

Ensure piping and fittings are flushed

before use.

Ensure piping for hazardous liquids is

arranged to allow pump flushing before removal of

the pump.

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