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Brand: KSB
KSB RDLO Axially Split Volute Casing Pump
Description
Large axially split pump for raw, industrial and seawater
The KSB RDLO is an axially split volute casing pump for pure, raw and industrial water as well as seawater. KSB lists water works, irrigation and drainage pumping stations, power stations, industrial water supply, general petrochemical applications, marine and offshore engineering and seawater desalination. An NSF-61 version is available.
The casing has a double volute that compensates radial forces and a double-entry impeller that compensates axial forces, so the bearings see only a minimum load. KSB states a calculated bearing life L10 of at least 100,000 hours for all sizes.
Technical specifications
| Parameter | Specification |
|---|---|
| Manufacturer | KSB SE and Co. KGaA, Frankenthal, Germany |
| Type | RDLO, axially split, double-entry volute casing pump |
| Pump sizes | DN 350 to 700 (14 to 35 in) |
| Flow rate | Up to 10000 m3/h (79260 gpm); larger on request |
| Discharge head | Up to 290 m (984 ft); larger on request |
| Operating pressure | Up to 30 bar (435 psi) |
| Temperature | Up to 80 C (284 F); higher on request |
| Bearing life L10 | At least 100000 hours for all sizes |
| Casing | Grey cast iron, nodular cast iron or duplex cast steel |
| Impeller | CrNi steel, bronze or duplex cast steel |
| Shaft | Cr steel or duplex steel |
| Shaft protecting sleeve | Cr steel, bronze or duplex steel |
| Casing wear rings | Bronze or duplex |
| Impeller wear rings (optional) | Bronze or duplex |
| Approval option | NSF-61 version available |
Sealing and maintenance
The solid casing split flange is at least 80 mm thick on the upper and lower casing parts, which ensures reliable sealing between the casing halves. For service, the self-centering upper casing and preloaded rotor allow the cover and rotor assembly to be fitted without further adjustment, the cover bolts are fully removed from the casing, and the split flange can be cleaned thoroughly with the pump interior freely accessible. Solid bearing brackets bolted to the upper casing, a rigid shaft and the double volute give low vibration and long life of bearings, seals and coupling.
Selecting an RDLO pump
Give flow, head, water quality (chloride content for seawater, solids, temperature), the suction arrangement and the material set. For seawater, duplex or bronze options are the relevant ones from the material list; confirm the combination with the supplier. The leaflet says larger flows, heads and temperatures up to 284 F are available on request.
Documents and quotation
State the pump size range, drive speed and whether NSF-61 is required. Confirm the leaflet data (09.24) against current documentation.
The attached KSB leaflet is the manufacturer document for the RDLO and lists the technical data used above. Seven Star LLC, an independent supplier in Muscat, quotes KSB pumps against your duty data. Browse Pumps for related equipment, or compare with the KSB Omega axially split volute casing pump.
Datasheets & Documents
- Brochure KSB RDLO axially split volute casing pump leaflet (EN, KSB, 09.24) Download
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About brand
KSB is a German manufacturer of pumps and valves, founded in 1871 in Frankenthal by the engineer Johannes Klein together with Friedrich Schanzlin and Jakob Becker, whose initials form the company name. The group is still headquartered in Frankenthal, Rhineland-Palatinate, and is listed as KSB SE & Co. KGaA.
Seven Star LLC lists KSB pump families including Etanorm, Movitec, Multitec and Omega, and supplies KSB pumps and spare parts to operators and contractors in Oman and the GCC, matching each request to the manufacturer's documentation.
KSB company profile
| Founded | 1871, Frankenthal, Germany, by Johannes Klein, Friedrich Schanzlin and Jakob Becker |
|---|---|
| First product | Klein's boiler feed apparatus, installed at a Frankenthal brewery |
| Headquarters | Frankenthal, Rhineland-Palatinate, Germany |
| Legal form | KSB SE & Co. KGaA, listed on the Frankfurt stock exchange |
| Product families | Etanorm, Etabloc and Etaline standardised pumps, Movitec and Multitec multistage pumps, Omega split-case pumps, Amarex submersible pumps, BOA, ISORIA and AMRI valves, spare parts and service |
Milestones
- 1871: Klein, Schanzlin and Becker found the company in Frankenthal.
- 1887: The company becomes a public limited company; Johannes Klein chairs the board until 1905.
- 1930: KSB takes over its competitor AMAG.
- 1935: The Eta standardised pump series is launched.
KSB pump series we list
- Etanorm: horizontal single-stage volute casing pump with ratings and main dimensions to EN 733, back pull-out design, replaceable casing wear rings.
- Movitec: vertical multistage high-pressure pump in ring-section design, with suction and discharge nozzles of the same diameter in line.
- Multitec: multistage ring-section pump for horizontal or vertical mounting, built in materials from cast iron to duplex stainless steel.
KSB products we list
Ordering KSB pumps and parts: what we need
For a spare part, send the type series and size, the KSB order number and serial number from the nameplate, and the part number from the sectional drawing. For a new pump, give flow, head, liquid, temperature, suction conditions, material preference, and motor voltage and frequency. Mechanical seal code and impeller diameter matter on replacements, because one pump size is built in many variants.
Facts checked against KSB's own company history (ksb.com) and its 150-year press material, October 2026.
Browse KSB products by category: Pumps.
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Frequently Asked Questions
What kind of pump is the RDLO?
An axially split, double-entry volute casing pump with a double volute.
Which fluids does KSB list?
Pure, raw and industrial water and seawater.
What is the stated bearing life?
A calculated L10 of at least 100000 hours for all sizes.
What sizes are covered?
DN 350 to 700.
Is there a drinking water version?
An NSF-61 version is available.
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