The WH type, multi-stage rotodynamic pumps
The WH series pumps are centrifugal, multi-stage horizontal pumps with ring sections with closed impellers and centrifugal-centripetal stators.
The WH pumps are designed for pumping clean or slightly polluted liquids (maximum content of impurities – 100 mg/dm3o for the WHA type pumps
and traces of non-abrasive particle content for the WHI, WHS and WHG) with temperatures of up to 140oC, within the resistance range of the materials
used for their construction.
Application
- Power industry – boiler feedwater, hot water, condensate,
- Industrial, pressure boosting and fire-fighting systems,
- Utility, municipal and drinking water systems,
- Distillate, solvents, fuels (including LPG) pumping stations,
- Filtration and reverse osmosis systems,
- Irrigation and snow-making systems,
- High pressure car washes.
Technical data
Capacity |
up to 700 m3/h |
Delivery head* |
up to 700 m |
Rotational speed |
up to 2950 1/min |
Temperature of pumped liquid* |
up to +140oC (+150oC) |
Flange sizes |
Suction flange acc. to PN EN 1092 |
Discharge flange acc. to PN EN 1092 |
WH.1 |
DN40 PN16 |
DN32 PN40 |
WH.2 |
DN50 PN25 |
DN40 PN100 |
WH.3 |
DN65 (DN100)** PN25 |
DN50 PN100 |
WH.4 |
DN80 PN25 |
DN65 PN100 |
WH.5 |
DN100 (DN150)** PN25 |
DN80 PN100 |
WH.6 |
DN125 PN16 |
DN100 PN40 |
WH.7 |
DN150 PN16 |
DN125 PN40 |
WH.8 |
DN200 PN16 |
DN150 PN40 |
WH.9 |
DN250 PN16 |
DN200 PN40 |
Ambient temperature |
up to 40oC |
Maximum pressure in housing* |
75 Bar |
Maximum supply pressure* |
10 Bar |
* Concerns selected constructions
** Concerns the WHI and WHG pumps with axial inlet
WH pump marking structure
a |
Series name |
Multi-stage pumps |
b |
Construction type |
A |
General purpose |
S |
Pump with the self-priming member |
I |
Pump with the initial impeller of lowered NPSH |
P |
Medium pressure pump |
G |
Pump with the self-priming member and the initial impeller |
|
c |
Discharge flange diameter |
1 |
DN32 |
2 |
DN40 |
3 |
DN50 |
4 |
DN65 |
5 |
DN80 |
6 |
DN100 |
7 |
DN125 |
8 |
DN150 |
9 |
DN200 |
|
d |
Number of stages and trimming no. |
2-15 |
2 - 15 degrees - 3000 1/min |
22-35 |
2 - 15 degrees - 3000 1/min |
42-55 |
2 - 15 degrees - 3000 1/min |
62-75 |
2 - 15 degrees - 1500 1/min |
82-95 |
2 - 15 degrees - 1500 1/min |
|
e |
Material execution |
1 |
Standard execution |
2 |
Maritime execution |
3 |
Execution for liquid fuels |
4 |
Strengthened execution |
5 |
Acid resistant execution |
9 |
Non standard execution |
|
f |
Operating temperature |
1 |
For liquid in temperature from -20 to +80oC |
2 |
For liquid in temperature from +80 to +140oC |
|
g |
Sealing |
1 |
Gland packing |
5 |
Single front sealing |
6 |
Single front sealing, unbalanced |
|
h |
Bearings |
1 |
Ball bearings lubricated with grease |
5 |
Slide bearing |
|
i |
Suction flange setting |
1 |
Upward suction flange (WHA from the 3rd degree) |
2 |
Right suction flange (looking from the motor side) |
3 |
Leſt suction flange (looking from the motor side) |
5 |
Suction flange with axial inlet |
|
Operation fields
Material execution
Name |
Material "e" |
1 |
2 |
3 |
4 |
5 |
Stator housing |
ZL250 (400-15*) |
G-X5CrNi Mo19112 |
400-15 |
200-400 |
G-X5CrNi Mo19112 |
Self-priming housing |
ZL250 |
200-400 |
Discharge casing |
ZL250 (200-400) |
Suction casing |
ZL250 |
Suction casing - axial inlet |
Stators |
ZL250 |
Impellers |
B101 |
B101 |
200-400 |
Initial impeller |
B101 |
B101 |
G-X25 |
Rotary impeller |
Bearing housing |
ZL250 |
ZL250 |
ZL250 |
ZL250 |
ZL250 |
Circulation members |
ZL250 |
ZbCr32 |
ZbCr32 |
ZbCr32 |
G-X5 |
Shaſt |
45 |
0H18N9 |
2H13 |
45 |
H17N13M2T |
Protection sleeves |
0H18N9 |
0H18N9 |
0H18N9 |
Wear rings |
ZbCr32 |
ZbCr32 |
ZbCr32 |
ZbCr32 |
G-X25 |
WHA/WHP pumps - general application
The WHA/WHP pumps are horizontal multistage pumps with a self-priming member, designed for pumping water at temperatures of up to 140oC and
liquid fuels and other liquids within the range of resistance of the materials used for their construction. In the WHA/WHP pumps the discharge flange
is directed upwards, when the suction flange can be set as desired every 90°. The first stage of the pump is equipped with a special impeller with
increased anti cavitation properties. The impellers of the WHA/WHP pumps are sealed with replaceable wear rings. The shaſt is protected with
protective sleeves and sealed with gland packing or front mechanical sealing. High pressure in the discharge gland is reduced with a special pressure
stuffing system, which reduces substantially the sealing load.
WHS pumps - with self-priming member
The WHS pumps are horizontal multistage pumps with a self-priming member, designed for pumping water at temperatures of up to 80oC and liquid
fuels and other liquids within the range of resistance of the materials used for their construction. The WHS pumps are the special development of
the WHA pump, in which aſter the last stage an additional circulation-vacuum member was applied. The ability of self-priming is executed by the
circulation member with side channels and an open impeller, which sucks gas from the inlet space of the centrifugal impeller of the last stage via
unloading holes and pumps it directly to the discharge casing. This solution enables suction of the gas from the working space of the pump and the
suction installation, resulting in lack of the need for application of additional priming systems. The WHS pump sucks by itself the liquid from the
tank located below the pump axis, provided its previous priming.
WHI pumps - with an initial impeller with lowered NPSH
A pump of general purpose, adapted to pump a medium in temperature up to 140oC within the resistance range of the materials used for its
construction with increased suction properties (with lowered NPSH). The pump is provided with an additional initial axial impeller mounted before
the centrifugal impeller of the first stage in the suction casing with the axial inlet, which results in the fact that the required anti-cavitation NPSH
surplus of the WHI pump is lower than for the WHA pump.
WHG pumps - with the self-priming member and the initial impeller
A self-priming pump, adapted to pumping of the medium with temperatures of up to 80oC within the resistance range of the material used for its
construction, with increased suction properties (with lowered NPSH). The WHG pump sucks by itself the liquid from the tank located below the pump
axis, provided its previous priming. The ability of self-priming is performed identically as in the WHS pump. The WHG pump is provided with an
additional initial axial impeller mounted before the centrifugal impeller of the first stage in the suction casing and with the axial inlet, which results
in the fact that the required anti cavitation NPSH surplus is lower than for the WHA and WHS pumps.
Advantages
- High efficiency,
- Good anti-cavitation properties,
- Variety of material versions,
- Ability of liquid self-priming (WHS, WHG)
- Simple design,
- Possibility of changing the angle of the suction flange,
- Application of shaſt protection sleeves and replaceable wear rings.
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