k
d
2
number of
holes n
Mating flange
All flanges designed as plate flanges
Omega
71
Standard flange connections
1)
:
Pump
Size
JL 1040 / GGG-NiCrNb 202
Nominal pressure acc. to:
JS 1030 / 1.4517
Nominal pressure acc. to:
DIN 2501
ISO 7005/2
BS 4504
ANSI B 16.1
DIN 2501
ISO 7005/2
BS 4504
ANSI B 16.1
250-480
PN 16
Table 16/11
Class 250
250-600
PN 25
Table 25/11
Class 250
PN 25
Table 25/11
Class 250
300-435
PN 10
Table 10/11
Class 125
PN 25
Table 25/11
Class 250
350-360
PN 10
Table 10/11
Class 125
1)
Other flange connections on request
Flange dimensions -- Hole pattern
All dimensions in mm
Standard
Suction flange
Discharge flange
DN
d
2
k
n
DN
d
2
k
n
Pump sizes 250-480 and 250-600 300
250
ISO 7005/2
DIN 2501
BS 4504
PN 10
Table 10/11
23 (M20) 400
12
23 (M20) 350
ISO 7005/2
DIN 2501
BS 4504
PN 16
Table 16/11
28 (M24) 410
12
28 (M24) 355
12
ISO 7005/2
DIN 2501
BS 4504
PN 25
Table 25/11
31 (M27) 430
16
31 (M27) 370
ANSI B 16.1
Class 125
28 (M24) 432
12
28 (M24) 362
ANSI B 16.1
Class 250
31 (M27) 451
16
28 (M24) 387
16
Pump size 300-435
400
300
ISO 7005/2
DIN 2501
BS 4504
PN 10
Table 10/11
28 (M24) 515
23 (M20) 400
12
ISO 7005/2
DIN 2501
BS 4504
PN 16
Table 16/11
31 (M27) 525
16
28 (M24) 410
12
ISO 7005/2
DIN 2501
BS 4504
PN 25
Table 25/11
37 (M33) 550
31 (M27) 430
16
ANSI B 16.1
Class 125
28 (M24) 540
28 (M24) 432
12
ANSI B 16.1
Class 250
34
572
20
31 (M27) 451
16
Pump size 350-360
400
350
ISO 7005/2
DIN 2501
BS 4504
PN 10
Table 10/11
28 (M24) 515
16
23 (M20) 460
ISO 7005/2
DIN 2501
BS 4504
PN 16
Table 16/11
31 (M27) 525
16
28 (M24) 470
16
ISO 7005/2
DIN 2501
BS 4504
PN 25
Table 25/11
37 (M33) 550
16
34 (M30) 490
ANSI B 16.1
Class 125
28 (M24) 540
16
28 (M24) 476
12
ANSI B 16.1
Class 250
34
572
20
31 (M27) 514
20
Baseplate / motor combinations
Pump
Motor Size
Pump
Size
250M
280S
280M
315S
315M
315L
315
355
400
No of po-
les
4
4
4
4
4
4
4
4
4
250-480
11
11
11
11
11
12
12
16
250-600
11
12
12
16
16
300-435
11
11
11
12
12
350-360
11
11
11
11
11
12
12
N.B.:
- The numbers listed in the table indicate the relevant baseplate numbers.
- The baseplate numbers shown in the boxes also serve to select the correct motor size for the listed pump size.
- Units comprising a motor size 315 and larger are completely assembled for verification and adjustment of the individual
components. Before shipment, the units are dismantled again and the components packed / shipped separately.