Centrifugal pumps with vortex impeller – RC series
Salvatore Robuschi RC centrifugal pumps are single-stage vortex pumps designed toreduce spare parts and warehousing costs. All pumps in this series have a single seal housing for all types of seals (single, tandem, cartridge, “back to back” or packed, according to API 682) and bearings designed according to ISO 5199.
They provide gentle pumping of media with viscosity up to 1000 cPs with solids content, including long and filamentous ones – including mixtures of up to 50% air or gas and liquids such as: chemical and crystalline suspensions, viscous and dense liquids with a high concentration of fibrous suspensions, municipal and industrial wastewater, sludge in the textile industry, refineries, general industrial services, pulp and paper industry, food, sugar, power plants and steel industry.
FAST FACTS
FEATURES AND BENEFITS
Salvatore Robuschi RC centrifugal pumps are single-stage vortex pumps designed toreduce spare parts and warehousing costs. All pumps in this series have a single seal housing for all types of seals (single, tandem, cartridge, “back to back” or packed, according to API 682) and bearings designed according to ISO 5199.
They provide gentle pumping of media with viscosity up to 1000 cPs with solids content, including long and filamentous ones – including mixtures of up to 50% air or gas and liquids such as: chemical and crystalline suspensions, viscous and dense liquids with a high concentration of fibrous suspensions, municipal and industrial wastewater, sludge in the textile industry, refineries, general industrial services, pulp and paper industry, food, sugar, power plants and steel industry.
| Pump capacity: | up to 800 m3/h |
| Lifting height: | up to 60 m |
| Maximum working pressure: | 10 bar |
| Temperature: | up to 180 °C – depending on the pumped medium |
| Viscosity: | up to 1000 cPs |
| Discharge nozzle: | from DN 32 to DN 250 |
| Impeller type: | Vortex with free passage up to 180 mm |
| Materials: | Grey Cast Iron GJL250 or AISI 316 Optionally: AISI 304, AISI 904, Duplex, Superduplex, Hastelloy B or C) |
| Industry | Application example |
| Food industry | Transfer of liquids with solids such as fruits, vegetables, sediments, stones, grass, etc. |
| Water treatment | Pumping liquids with suspensions and fibers, such as biological sludge, flocculent sludge, clarification waste. |
| Chemical industry | For crystallizers, transfer, washing and recovery of solids or high viscosity substances. |
| Textile and tanning industry | For chemical baths with suspensions and filamentous liquids. |
RC pumps are single-stage pumps with a special recessed impeller located in the rear of the housing. Thanks to this design, most of the liquid passes through the pump body without direct contact with the impeller. This ensures that all crystals, delicate solids (e.g. peas, corn, beans, olives, seeds, granules), suspensions (e.g. mud, sand), etc. can be transported without any damage. Long and stringy solids pass through the pump without causing blockages. The Vortex impeller is capable of pumping mixtures of up to 50% air or gas. In addition, this series of pumps can be used for pumping media with viscosity up to 1000 cPs.
RC series centrifugal pumps are designed with a modular construction to reduce spare parts and storage costs. Many devices use common spare parts. In addition, all Salvatore Robuschi vortex series have one seal housing for all seal types. When replacing a few elements, the pumps can be equipped with single, tandem, cartridge, back to back or packing seals. Seals can be equipped with a PLAN according to API 682 (e.g. PLAN 11, PLAN 52, PLAN 53, PLAN 54).

The impeller of a centrifugal pump is driven by a motor (most often electric) via a shaft. The pump head, along with the coupling and motor, constitutes the pump unit. In centrifugal pumps, gears are not used, and the rotational speed of the motor is transmitted directly. Most commonly, two- and four-pole motors are used (rotational speeds of approximately 2900 and 1450 rpm, respectively), and less frequently, six- and eight-pole motors are used (approximately 900 and 700 rpm).
A very important element of the pump is the seal at the point where the drive shaft enters the body. This seal is designed to prevent the pumped liquid from leaking out of the pump, maintain pressure inside the pump, and prevent air from entering the pump. Among the seals for centrifugal pumps, we can distinguish gland packing packings, single mechanical seals, and double mechanical seals. We also distinguish a special type of pump – sealless (hermetic) pumps.
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RCM Monoblock version with standard B5 electric motor.
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RCL Version with independent support with bearings in oil bath and mounting flange for coupling with flanged motor. This version is available for motor sizes up to IEC 160. |
RCB Shaft version: pump with independent bearings lubricated with oil or grease, coupling (short or spacer), base and motor.
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RCV Vertical version with intermediate sleeves. |
RCC Cantilever vertical type. |
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A cylindrical chamber built according to EN-12756 can be equipped with any type of mechanical seal.
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Single mechanical seal
The most popular mechanical seals for use with non-contaminated liquids (no solids). The pumped liquid lubricates the sealing surface and dissipates heat. |
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Double back-to-back seal
A back-to-back double seal is a solution with a pressurized chamber. The external barrier fluid, supplied at a pressure approximately 0.5 – 1 bar higher than the pressure of the pumped medium, separates the product from the atmosphere. |
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Double tandem mechanical seal
This type of seal has two pairs of face seals facing in the same direction. The use of this seal allows for a gradual reduction of pressure from the pump chamber or the use of a flushing medium and monitoring of the main mechanical seal of the product. The external service liquid reservoir serves to separate the pumped product from the atmosphere. |
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Cartridge seal
A cartridge seal resembles a standard seal, but the stationary part of the cartridge seal is built into the housing, and the rotating part is mounted in a sleeve sealed with an O-ring. The cartridge seal housing is a mounting element in the pump, which eliminates the need to install a seal cover. |
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packing seal
Packing seal is a special cord wound around the shaft separating the space between the pump body and the drive. It does not provide 100% tightness due to the need for continuous lubrication and cooling of the cords. |
| Pump capacity: | up to 800 m3/h |
| Lifting height: | up to 60 m |
| Maximum working pressure: | 10 bar |
| Temperature: | up to 180 °C – depending on the pumped medium |
| Viscosity: | up to 1000 cPs |
| Discharge nozzle: | from DN 32 to DN 250 |
| Impeller type: | Vortex with free passage up to 180 mm |
| Materials: | Grey Cast Iron GJL250 or AISI 316 Optionally: AISI 304, AISI 904, Duplex, Superduplex, Hastelloy B or C) |