Allweiler NB Series - Page 4

Table of contents
List of figures
Fig. 1 Type plate (example) ........................ 10
Fig. 2 ATEX plate (example) ........................ 10
Fig. 3 Pump type code (example) .................. 10
Fig. 4 NB/CLB layout ................................ 11
Fig. 5 Single mechanical s eal wi th quenching
(sketch) ....................................... 12
Fig. 6 Fastening the lifting gear to the pump
aggregate .. .. . .. ..... .. . .... . .. .. ..... .. . .... . 13
Fig. 7 Straight pipe lengths upstream and down-
stream of t he pump (recommended) . . .. .. . 17
Fig. 8 Widening the stub shaft .. .. . .... .. . .. ..... .. . 24
Fig. 9 Widening the stub shaft .. .. . .... .. . .. ..... .. . 24
Fig. 10 U3...D – Unbalanced mechanical seal – sizes
with diameter 16 at the shaft seal . .. .. . .... . 31
Fig. 11 Attachment of the guard sheet to the motor
bell housing .. . .. ..... .. . .... . .. .. ..... .. . .. ... 31
Fig. 12 U3...D – Unbalanced mechanical seal –
sizes with diameter 24 and 30 at the shaft
seal ............................................ 32
Fig. 13 Housing c over version for sizes 2/40-250/01
and 2/50-250/01 .............................. 32
Fig. 14 Sizes w ith shaft diameter 24 at the shaft
seal ............................................ 32
Fig. 15 Ver sion with intermediate ring, sizes
40-250/01 and 50-250/01 .................... 32
Fig. 16 Attachment of the guard s heet to the motor
bell housing .. . .. ..... .. . .... . .. .. ..... .. . .. ... 32
Fig. 17 U 3.9D, U3.12D – Unbalanced mechanical
seal ............................................ 33
Fig. 18 U3...K – U nbalanced mechanical seal .... . 33
Fig. 19 U2...D – Balanced mechanical seal .. . .. ... 33
Fig. 20 Two- stage sizes with diameter 30 at the shaft
seal, unbalanced mechanical seal U3D and
U3.20D ........................................ 33
Fig. 21 U3...D – Unbalanced mechanical seal – sizes
with diameter 40 at the shaft seal . .. .. . .... . 34
Fig. 22 Ver sion with intermediate ring, sizes
65-315/01, 80-315/01, 100-315/01,
65-400/01 ..................................... 34
Fig. 23 Attachment of the guard s heet to the motor
bell housing .. . .. ..... .. . .... . .. .. ..... .. . .. ... 34
Fig. 24 U3...D – Unbalanced mechanical seal – sizes
with diameter 30 at the shaft seal . .. .. . .... . 35
Fig. 25 Attachment of the guard s heet to the motor
bell housing .. . .. ..... .. . .... . .. .. ..... .. . .. ... 35
Fig. 26 Jacking screws ............................... 35
Fig. 27 U3...D – U nbalanced mechanical seal .... . 35
Fig. 28 U3...D – Unbalanced mechanical seal – sizes
with diameter 40 at t he shaft seal .. ..... .. .. 36
Fig. 29 Version with intermediate ring ............... 36
Fig. 30 Jacking screws ............................... 36
Fig. 31 Jacking screws f or version with intermediate
ring ............................................ 36
Fig. 32 Attachment of t he guard sheet to the motor
bell housing ................................... 36
Fig. 33 U3.11D – Unbalanced mechanical
seal ............................................ 36
Fig. 34 Empirical formulas for forces and
torques ........................................ 39
Fig. 35 Flange loads at the pump .. . .... . .. ..... .. .. 39
Fig. 36 Correction factor M and operating
temperature ................................... 40
4 NB / CLB series BA-2006.05 468.0005 GB – 550 148