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SIHI HALBERG HEGA
Reserved the right to make modifications SIHI Pumps, Inc. / June 2007
HEGA 2502 … 6510
TECHNICAL DATA
Capacity : Max. 638 gpm ( 145) m3/ h
Head : Max. 1279 ft ( 390) m
Speed : Max. 3600 r.p.m.
Temperature : Max. 380 º F ( 194) º C
Casing pressure : Max. 580 PSI ( 40) bar
Shaft seal : Stuffing box or mechanical seal
Direction of rotation : To the right ( clockwise) ,
looking at shaft end
APPLICATION
Series HEG multistage centrifugal pumps are used in
applications where the requirement is for trouble-free
pumping of clear or slightly dirty liquids. They are used in:
- Heating plants
- Waterworks and water supply plants
- Pressure raising plants
- Circulating water and condensate plants
- Fire extinguishing plants
- Purification plants
- Irrigation plants
- Boiler feed water plants
- Pressurized water producing stations
DESCRIPTION AND DESIGN DETAILS
Horizontal multistage centrifugal pumps with sectional casing
and closed impellers.
The manufacturing program covers five sizes, with 2 to
maximum 13 stages, according to the size, the speed and
the shaft seal. Axial thrust balancing is carried out by
balancing the impellers separately. The remaining axial
thrusts are taken up by adequately sized antifriction
bearings.
The impellers, diffusers, as also the wear rings on size 65,
are interchangeable between stages.
Arrangements combining impeller of differing diameter
permit, within the application field, an optimum adaptation
of the performance curve of the pump to the required
performance characteristics.
On the suction side, the mounting feet are arranged on the
casing of the first stage. By this means, it is possible to
ensure easy adaptation to different installation conditions,
even subsequent to initial installation, by pivoting the suction
head casing. The driver is arranged on the suction side but
discharge side driver or driver on both sides are possible on
request.
All sizes can be supplied with one or more dummy stages
upon request.
Maximum casing pressure [ PSI ( bar) ] :
Temperature range ( 1) Suction Discharge
14 to 248° F ( -10 to 120 º C) 232 ( 16) 580 ( 40)
up to 140 º C 232 ( 16) 551 ( 38)
up to 194 º C 188.5 ( 13) 472.7 ( 32.6)
( 1) Limitations due to type of shaft sealing used
ATTENTION: The maximum casing pressure is equal to suction
pressure plus zero flow head.
Flanges:
The suction side flange according to DIN 2533 PN16 and
the discharge side to DIN 2535 PN40. The flanges can be
drilled according to ANSI B16.1 class 250, on request.
Flange positions:
Suction flange arranged horizontally towards the right
hand side ( looking at the shaft end) and discharge flange
radially upwards. On request, the suction flange can be
arranged on the left and, in the case of pumps with
three or more stages, vertically upwards.
Bearings:
One cylindrical roller bearing according to DIN 5412 and
one deep-groove roller bearing to DIN 625, both lubricated
by grease.
Shaft sealing:
Sealing of the shaft can be carried out either by a stuffing
box or mechanical seal as required.
- Sealing Code 001: Un-cooled stuffing box.
Temperature range: 14 to 230° F ( -10 to 110 º C.)
- Sealing Code 022: Externally flushed, un-cooled, lengthened
stuffing box ( only for sizes 40, 50 and 65) .
Temperature range: to 230° F ( -10 to 110 º C.) .
- Sealing Code 511: Cooled stuffing box.
Temperature range: up to 284° F ( 140 º C) [ refer factory for
higher temperatures]
- Mechanical Seal Code BK3/ BKS/ BKU: Unbalanced single
mechanical seal with rubber bellows, lubricated by pumpage.
Temperature range: 14 to 230° F ( -10 to 110 º C.) – [ refer
factory for higher temperatures when mechanical seal is
required.]
SIHI HALBERG HEGA Page 2
Reserved the right to make modifications SIHI Pumps, Inc. / June 2007
Materials of construction
Materials of construction( 1)
Pos. Pump parts
0B 0C 0D 0E 0R 0S 4B
10.6 Suction casing
10.7 Discharge casing
10.8 Stage casing
0.6020
23.0 Impeller 0.6020 2.1060 1.4410 0.6020 2.1060
17.1 Diffuser 0.6020 2.1060 0.6020 0.6020
1.4410
21.1 Shaft 1.7225 1.4021
52.4 Shaft protection sleeve ( stuffing box) 1.4301
52.32 Shaft protection sleeve ( mechanical seal) 1.4301
1.4021
46.1 Stuffing box Synthetic fiber with PTFE impregnation
43.3 Mechanical seal
AQ1EGG [ Carbon graphite / Silicon carbide / EPDM ( 2) ]
AQ1VGG [ Carbon graphite / Silicon carbide / FKM ( 2) ( Viton) ]
Q1Q1VGG [ Silicon carbide / Silicon carbide / FKM ( 2) ( Viton) ]
( 1) Material number according to German Standard - DIN.
( 2) Abbreviation according to ISO 1629
Equivalent materials
German Standard - DIN
Name
Material Nr. Short name or Description
European Standard - EN USA - Standard
Gray cast iron 0.6020 GG-20 EN-GJL-200 ASTM A48 clase 30
Cast nickel tin bronze 2.1060 G-CuSn 12 Ni EN-CC484K UNS C91700
Cast Duplex stainless steel 1.4410 G-X10CrNiMo 18 9 EN-1.4410 ASTM A351 clase CF12M
Alloyed high-strength steel 1.7225 42 CrMo 4 EN-1.7225 AISI 4140
Martensitic stainless steel 1.4021 X20Cr 13 EN-1.4021 AISI 420
Austenitic stainless steel 1.4301 X5CrNi 18 9 EN-1.4301 AISI 304
Speed / Number of stages
Maximum speed and maximum number of stages according to shaft seal option.
Maximum number of stages for the shaft seal
Pump size Maximum speed
[ r.p.m.] 001 022 511 BK3 BKS BKU
1 800 13 - 11 13 13 13
2500 3 000 11 - 9 13 13 13
3 600 8 - 8 10 10 10
1 800 12 - 10 12 12 12
3200 3 000 9 - 8 11 11 11
3 600 6 - 6 7 7 7
1 800 12 10 10 12 12 12
4000 3 000 8 8 8 9 9 9
3 600 6 6 6 6 6 6
1 800 11 9 9 11 11 11
5000 3 000 6 6 6 8 8 8
3 600 4 4 4 5 5 5
1 800 10 8 8 10 10 10
6500 3 000 5 5 5 6 6 6
3 600 3 3 3 4 4 4