ROWA -HP High-Pressure Centrifugal Pump

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1 ROWA -HP High-Pressure Centrifugal Pump

2 2 Pump Type ROWA -HP Quality through Experience Fields of Application Handling of clean to slightly contaminated corrosive liquids up to discharge pressures of 100 bar Horizontal, radial split, ring section multistage pump with radial impellers and single flow entry Materials of Construction Seawater desalination requires corrosion and abrasion resistant materials. This is why we are using DUPLEX stainless steel as our standard material for all wetted pump parts DÜCHTING PUMPEN offers improved corrosion resistant materials like SUPER DUPLEX stainless steel with Pitting Resistance Equivalent numbers above 40 Pump Size DN 50 to DN 300 (ANSI 2-12 ) Capacity: up to m³/h (15,000 gpm) Pressure: up to 100 bar (1,450 psi) Rotating Speed: up to rpm Temperature: up to 120 C Manufacturing Machining and balancing using latest multiple axis machines to achieve superior precision and performance Precision Casting Impellers und diffusers are cast by using ceramic moulds to get smooth surfaces for outstanding hydraulic performance Connections Pump with one or two connective shaft ends Flange dimensions according to DIN or ASME standards Pump nozzle location rotatable in 90 steps Quality Assurance Positive Experiences To ensure highest quality, every pump is tested and certified on the test bed according to international standards Impeller in DUPLEX stainless steel after 12 years of operation in a mediterranean seawater desalination plant Ibiza, SPAIN m³/day Wilayas, ALGERIA South Sinai, EGYPT m³/day Montazah, EGYPT m³/day m³/day 3

3 4 Technical Features ROWA-HP DN 50 - DN 300 (ANSI 2-12 ) Diffuser with reduced impact losses due to CFD optimizer flow channels Discharge Casing optimizied by numerical calculations to achieve best outflow conditions Impeller design in consideration of optimal specific speed cast in ceramic moulds. Different impeller sets available for every pump size Balancing Device axial thrust compensation by balancing discs or balancing drums Medium lubricated plain bearing eliminates second mechanical seal Bearings supplied with oil-lubricated anti-friction bearings for long-life performance Suction branch in horizontal orientation for constant inlet velocities and reducing suction pressure requirements Wear Rings in carbon fiber reinforced PEEK for minimizing flow losses and for outstanding reliability 5

4 6 Performance Data DN 50 - DN 300 (ANSI 2-12 ) Energy Recovery While energy recovery by Pelton Turbines was state of the art in the 90s and is still very attractive in terms of reliability and simple but efficient plant control, DÜCHTING PUMPEN follows the trend to pressure exchanger systems and is offering not only proven energy recovery turbines type ROWA -RT but also booster pumps type ROWA -HPB. Pelton Turbine Type ROWA -RT Pelton Turbine, single or double nozzle application Capacity: up to m³/h (4,400 gpm) Pressure: up to 100 bar (1,450 psi) 5 Pump Type ROWA -HPB Single stage centrifugal pump end-suction type with radial impellers and single flow entry, horizontal or vertical pump arrangements possible Pump Size DN 80 to DN 400 (ANSI 3-16 ) Capacity: up to m³/h (18,000 gpm) Discharge pressure: up to 100 bar (1,450 psi) Suction pressure : up to 80 bar (1,160 psi) Features Material of construction in DUPLEX or SUPER DUPLEX stainless steel Pull-out process design for easy access to wear parts Cartridge mechanical seal Radial thrust compensation by double volute casing to reduce shaft deflection and bearings loads Wear rings in compound material to achieve small clearances but reliable operation Layyah & Khor Fakkan, UAE m³/day Sur, OMAN Jeddah, KSA m³/day Tianjin, CHINA m³/day m³/day 7

5 8 DÜCHTING PUMPEN - Company Profile DÜCHTING PUMPEN is a privately owned German company with more than 70 years of experience in the field of advanced centrifugal pumps for use in desalination and process industries. Our motto Quality Through Experience forms the basis of our sophisticated product range. The capabilities of our company in the construction, manufacturing, testing and commissioning of our products is highly respected in the industries we serve. Our reputation is based on a sustainable company policy, focusing on efficiency, reliability, innovation and thorough customer after-sales service which is provided by partners in the countries where our products are installed. In order to meet the current demand for highly efficient and reliable products in seawater desalination, DÜCHTING PUMPEN offers optimized high-pressure pumps and energy recovery turbine units. To minimize total energy costs in high pressure seawater desalination plants, we are at your service during both design and operation. Having supplied high-pressure pump units for Seawater Reverse Osmosis from its commercial start, DÜCHTING PUMPEN can look back on a large number of references. DÜCHTING PUMPEN Maschinenfabrik GmbH & Co. KG Wilhelm Düchting Str Witten, Germany Web: Phone: Fax: info@duechting.com