pompy i systemy pompowe  
 
 



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
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

W H
 
A
 
3
 
1 4
   
1 1 5 1 3
 
a a
 
b
 
c
 
d d
   
e f g h i
 


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.
2-14 2 - 14
22-34 2 - 14
42-54 2 - 14
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 GG25
(400-15*)
B101 GGG40 200-400 G-X5CrNiMo19112
Self-priming housing
Discharge casing
Suction casing ZL250
Impellers B101
Initial impeller B101
Stators ZL250 400-15
Bearing housing ZL250 ZL250 ZL250 ZL250 ZL250
Rotary impeller B101 B101 B101 B101 G-X25CrNiMo2593
Circulation members ZL250 ZbCr32 400-15 200-400 G-X5CrNiMo19112
Shaſt 45 1H18N9T 2H13 45 H17N13M2T
Protection sleeves 2H13 45
Wear rings ZbCr32 ZbCr32 ZbCr32 ZbCr32 G-X25CrNiMo2593
Suction casing - axial inlet ZL250 B101 400-15 200-400 G-X5CrNiMo19112

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.




Hydro-Vacuum S.A.
ul. Droga Jeziorna 8
86-303 Grudziądz
tel. 56 45 07 415
fax. 56 46 25 955
Copyright © Hydro-Vacuum S.A.

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