Allweiler NT Series - Page 4

Table of contents
List of figures
Fig. 1 Type plate (example) ........................ 10
Fig. 2 Digital nameplate, standard version
(example) ..................................... 10
Fig. 3 Digital nameplate, variant with optional RFID
transmitter (example) ........................ 10
Fig. 4 Pump type code (example) .................. 11
Fig. 5 NT layout ..................................... 12
Fig. 6 Single mechanical seal with quenching
(sketch) ....................................... 13
Fig. 7 Fastening lifting gear to pump unit .. . . . . .. . . 14
Fig. 8 Fastening the lifting gear to the pump . . . . .. 14
Fig. 9 Setting down the pump without an installed
support foot ................................... 14
Fig. 10 Installation with foundation .................. 17
Fig. 11 Checking for distortion ....................... 17
Fig. 12 Installation without a foundation .. . . . . .... . . 18
Fig. 13 Straight pipe lengths upstream
and downstream of the pump
(recommended) .............................. 19
Fig. 14 Checking the alignment of the
coupling ....................................... 21
Fig. 15 Checking for lateral and vertical
misalignment ................................. 21
Fig. 16 Checking for angular displacement .. . . . . . .. 21
Fig. 17 Aligning the motor with adjusting
screws ........................................ 22
Fig. 18 U…D – Unbalanced mechanical seal .. . . . . 34
Fig. 19 U3…D – Unbalanced mechanical seal . . . .. 35
Fig. 20 U3…D – Unbalanced mechanical seal . . . .. 36
Fig. 21 U3…D – Unbalanced mechanical seal . . . .. 37
Fig. 22 U3…D – Unbalanced mechanical seal . . . .. 38
Fig. 23 U3…D – Unbalanced mechanical seal . . . .. 39
Fig. 24 U3…D – Unbalanced mechanical seal . . . .. 40
Fig. 25 U1C –Stuffingboxwithexternal
flushing ........................................ 41
Fig. 26 U3…D – Unbalanced mechanical seal . . . .. 41
Fig. 27 U3.9D, U3.12D – Unbalanced mechanical
seal ............................................ 41
Fig. 28 U1B – Stuffing box with self-locking ........ 41
Fig. 29 Coupling guard on base plate versions . . . . . 41
Fig. 30 Empirical formulas for forces and
torques ........................................ 46
Fig. 31 Flange loads at the pump ................... 46
Fig. 32 Correction factor M and operating
temperature ................................... 47
List of tables
Tab. 1 Target groups and their duties .............. 5
Tab. 2 Other applicable documents and their
purpose ....................................... 5
Tab. 3 Warnings and consequences of disregarding
them ........................................... 6
Tab. 4 Symbols and their meaning ................. 6
Tab. 5 Technical terms and their meaning .. .. . . . . . 6
Tab. 6 Quenching - variants and characteris-
tics ............................................. 13
Tab. 7 Treatment for storage ........................ 15
Tab. 8 Measures to be taken if the pump is shut
down .......................................... 24
Tab. 9 Measures depending on the behavior of the
pumped liquid ................................ 24
Tab. 10 Measures to be taken after prolonged
shutdown periods ............................ 25
Tab. 11 Measures for return .......................... 27
Tab. 12 Malfunction/number assignment ............ 29
Tab. 13 Troubleshooting list .......................... 31
Tab. 14 Connection designation abbreviations .. . . .. 32
Tab. 15 Designation of components according to part
numbers ...................................... 33
Tab. 16 Versions and details at bearing bracket
700 ............................................ 40
Tab. 17 Ambient conditions ........................... 42
Tab. 18 Operating parameters for sealing medium in
open flow system .. . .. . .. . . ... . .. . . .. . . .. . ... . 42
Tab. 19 Sound pressure level ........................ 42
Tab. 20 Tightening torques ........................... 43
Tab. 21 Cleaning agents .............................. 43
Tab. 22 Grease types ................................. 43
Tab. 23 Minimum amounts for grease
lubrication ..................................... 43
Tab. 24 Bearing bracket size ......................... 44
Tab. 25 Height setting at the adjusting screw .. . . . . . 45
Tab. 26 Flange loads .................................. 47
Tab. 27 Spare parts for two years of continuous
operation ...................................... 48
Tab. 28 Declaration of harmlessness ............... 49
Tab. 29 Declaration of conformity accord
ing to EC
Machine Directive ............................ 50
4 NT series BA-2021.04 en-US 161-295/E