- Ruhrpumpen is an innovative pump technology company that offers a wide range of quality centrifugal pumps, including their line of horizontal split case pumps. - Their HS/ZW horizontal split case pumps are single- or multi-stage, double suction pumps with double volutes and an axially-split case. - Ruhrpumpen ensures their pumps meet the latest technical requirements and are suitable for applications in industries like oil/gas, petrochemical, power generation, mining, and water treatment.

1. SPLIT CASE
Double Volute,
Horizontal Split
Case Pumps

2. Ruhrpumpen is an innovative and efficient centrifugal pump technology
company that offers operators of Pump Systems a wide range of quality
products.
Split Case Pumps
The Ruhrpumpen HS/ZW pumps are single- or multi-
stage, double suction, double volute, axially-split case
pumps.
The suction and discharge nozzles are integrally casted in
the lower half of the casing and on the same horizontal
center-line. The nozzle configuration is side/side.
Intensive research and development ensures that the
products of Ruhrpumpen are continuously improved to
meet the latest technical requirements. Instant availability
of spare parts, together with first-class service, ensures
customers that they have selected the right partner.
Ruhrpumpen is committed to global excellence with a complete range of Pumps, Fire Pump packages and other related
products such as Decoking Systems and Tools to support the core markets (namely Oil & Gas, Petrochemical, Power, Heavy
Industry applications, Mining and Water services).
The broad product line complies with the most demanding quality specifications and go beyond stringent industry standards
such as API, ANSI, Hydraulic Institute, Underwriter’s Laboratories, Factory Mutual and ISO 9001.
Ruhrpumpen’s quality program and in-house foundry, along with the latest equipment, ensures that the pumps we
manufacture will provide long operating life even under the most severe conditions.
2

3. Selection Chart
Complete Range of Split Case Pumps
SPLIT CASE (HSD, HSC, HSR, HSL, HSM, ZW) / Various Poles
With this complete range of Horizontal Split Case Pumps and our depth of expertise in pump engineering, Ruhrpumpen
can truly a solution to every customer.
HSD HSC ZW
Selection Chart SPLIT CASE (HSD, HSC, HSR, HSL, HSM, ZW)
60 Hz
50 Hz
VARIOUS POLES
TOTAL
HEAD
FLOW
114
2000
ft
ft
95
227 273
189 227 341 454 681 908 1363 1817 2271 3407 4542 6814 11356 17034 26498
1389
1500
1042
1000
720
694
500
576
400
432
300
288
200
216
150
144
100
130
90
115
80
101
70
86
60
72
50
58
40
50
35
40
28
20
14
m³/h
m m
m³/h
409 1090
545 818 1635 2180 2725 4088 5451 8176 13627 20441 31800
500
417 833 1000 1500 2000 3000 4000 6000 8000 10000 15000 20000 30000 50000 75000 116667
1000 1200 1800 2400 3600 4800 7200 960012000 18000 24000 36000 60000 90000 140000 gpm
gpm
610 424
317
212
152
122
91
61
46
30
28
24
21
18
15
12
11
8
4
457
305
219
176
132
88
66
44
40
35
31
26
22
18
15
12
6
Pump Type
Capacity Head
mETRIC U.S. STANDARD METRIC U.S. STANDARD
HSD up to 1,590 m³/h 7,000 U.S. gpm 168 m 550 ft
HSC up to 31,800 m³/h 140,000 U.S. gpm 168 m 550 ft
HSR up to 2,050 m³/h 9,000 U.S. gpm 155 m 500 ft
HSL up to 500 m³/h 2,200 U.S. gpm 155 m 500 ft
HSM up to 454 m³/h 2,000 U.S. gpm 670 m 2,200 ft
ZW up to 9,000 m³/h 40,000 U.S. gpm 340 m 1,115 ft
Horizontal Split Case Pumps Performance Data
3
SPLIT CASE
Double Volute, Horizontal Split
Case Pumps

4. Characteristics
Images for general arrangement use only, not certified for construction.
1 WEAR RINGS
Casing wear rings are standard and
replaceable on all pumps. Impeller wear
ring are optional.
9 MECHANICAL STRENGTH
Provided with ribs and connection
bosses to ensure mechanical strength
during hydrostatic test and normal
operation.
3 BEARING HOUSING
360° bearing housing arrangement
to ensure mechanical stability and
low vibration levels. Design allows
to use the housing for packing
(Standard seal) or mechanical seal
(Optional seal).
2 IMPELLER
All impellers are double suction,
dynamically balanced and held in place
by separate nuts. (investment casting
and sand casting manufacturing).
5 CASING SEALING SYSTEM
Innovative sealing system allows
metal to metal contact ensuring a
perfect rotor-casing alignment,
improved sealing capacity and ease
of field maintenance.
4 BEARINGS
Interchangeable line and thrust
bearings (conservatively rated at
100,000 hours“plus” bearing life)
guarantee maximum life at
minimum maintenance cost. Either
oil or grease lubrication available.
6 FLANGES
Suction and discharge
connections all on the
same center line for
piping ease.
4

5. 8 SHAFT SLEEVE
Separate shaft nuts feature provides
the greatest simplification of sleeve
replacement. Sleeves are sealed to
shaft by an “O” ring to prevent leakage
and subsequent erosion. 11-13%
chrome sleeves are available for
extended sleeve life on packing.
7 SHAFT
A rigid shaft combined with double -
volute casing - results in low shaft
deflection at all operating points. Low
deflection reduces packing wear, ring
wear and bearing loading, which
ultimately results in sustained
efficiency and economic operation.
Capacity up to 31,800 m3
/h 140,000 U.S. gpm
Head up to 340 m 1,115 ft
Pressure up to 27 bar 298 psig
Temperature -9 °C to 150 °C 50 °F to 300 °F
Horizontal Split Case Performance Data
• Single or multi-stage horizontal centrifugal pump
• Horizontally split case, single-volute or double-volute
(some HSC sizes) minimizes thrust loads and allow
operation over a wide range of capacities
• Flanged connections
• Enclosed impellers, double suction provides hydraulic
balance eliminating axial thrust
• Clockwise or counterclockwise rotation
• Oil lubrication bearings
• Stuffing box allows mechanical seal option
• Horizontal or vertical mounting arrangements available
• Foot mounted
Description
Benefits
• All HS/ZW pumps can be mounted vertically or horizontally,
depending on the requirements of the customer
For pump operation outside this range, please contact a
Ruhrpumpen representative.
Applications
The Ruhrpumpen Split Case Pumps are designed for a wide
range of industrial, chemical process and municipal.
Applications such as:
• Cooling towers
• Municipal
• Oil process
• Dewatering
• Mining
• Water
• Petrochemical
• Sugar Industry
• Paper Industry
• Fire Service
• Pipeline
• Power Generation
5
SPLIT CASE
Double Volute, Horizontal Split
Case Pumps

6. • ZW bearing housing has a 360° mounting configuration,
feature that allows ease of maintenance and improved
mechanical stability.
• Modular design, allows parts interchangeability within
the same pump in different sizes.
• Standardized design allows use of same components
for both, mechanical seal or packing option.
• Improved casing sealing through an innovative design
which assures metal to metal contact.
• Oil lubricated bearings
• Flanged connections
• Stuffing box allows for
packing or mechanical seal
options.
From our Industrial Line, the HSM pump is a split case
heavy-duty process pump. Unlike our other split case pumps,
the HSM type is a two- or four-stage pump which allows
higher pressure applications such as petrochemical,
chemical, industrial, boiler feed or power plant applications.
ZW Design Features
Multi-Stage
Horizontal Split Case
Design Features
HSM
ZW
6

7. 7
Other Ruhrpumpen Products
Sump Pump
Vertical Turbine Pump
VTP - Multi-stage vertical
centrifugal pump with dif-
fuser type bowl, semi-open
/ enclosed impellers, cast
iron bowls, counterclockwise
rotation viewed from coupling
end.
Deep well and Irrigation,
Cooling Tower, Sump,
Condensate.
VSP - Single-stage single
suction vertical centrifugal
pump, volute-type case, flan-
ged and threaded discharge,
cast iron casing, flexible
coupling.
Sump Drainage, Flood
Control, Air Wash Systems,
Power Plants, Chemical
Industry, Municipal Systems,
Water Treatment, Process
Plants, Sewage Lift Stations.
Vertical In-Line Pump Flexible-Coupled
Pump
IVP - Split-coupling, flanged
suction and discharge on
common center-line, up to
350 psi, fully enclosed, im-
peller with hydraulic balance
which prevents vibration,
radially-split casing.
Fire Service, Air Conditioning
Systems, Condensed Water,
Ice Water, Service Water,
Ocean Water, Building Water
Supply Systems.
CPP - Single-stage end-
suction horizontal centrifugal
pump, enclosed impeller,
radially split casing with
flanged connections.
Petrochemical, Oil & Gas,
Steel Industry, Automotive,
Food Processing, Power
Generation, Pharmaceuticals,
Water Treatment, General
Process.
ANSI Horizontal Process Pump
SM - Axially-split, horizontal
multi-stage, centrifugal
pump, near center-line
mounted, single suction,
radial, closed impeller (API
Type BB3).
Oil Fields and Terminals,
Water Pipelines, Fluid
Injection and High Pressure
Services.
Multi-Stage, Axially Split Casing Pump
VLT - Low NPSH “Shockless
Entry” first stage impeller
(single- or double-suction),
single- or multi-stage. Stan-
dard construction materials
according to API latest edition
(type VS6).
Condensate, Power plants,
Municipal, Hydrocarbons,
Pipeline and Refineries.
Vertical Barrel Pump
SPLIT CASE
Double Volute, Horizontal
Axially Split Case Pumps

8. Ruhrpumpen Plants
International service and support
RP-BR-SPC-EN-V01-140417
USA, TULSA & ORLAND
MEXICO, MONTERREY
BRAZIL, RIO DE JANEIRO
ARGENTINA, BUENOS AIRES
GERMANY, WITTEN
EGYPT, SUEZ
INDIA, CHENNAI
CHINA, CHANGZHOU
Represented by:
April.14 www.ruhrpumpen.com