Open channel impeller centrifugal pumps – RE series
Salvatore Robuschi RE pumps are multi-channel centrifugal pumps with an open channel impeller. Pumping solids suspensions, high viscosity liquids, low NPSHa values and high efficiency in difficult conditions – these pumps guarantee excellent suction performance even in the presence of dissolved gases and air. 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.
RE series vortex pumps can be used for slightly contaminated liquids in sewage treatment plants, fertilizers, viscous liquids in the food or chemical industry, general industry, sugar, paper, steel, in refineries and power plants.
FEATURES AND BENEFITS
FAST FACTS
Salvatore Robuschi RE pumps are multi-channel centrifugal pumps with an open channel impeller. Pumping solids suspensions, high viscosity liquids, low NPSHa values and high efficiency in difficult conditions – these pumps guarantee excellent suction performance even in the presence of dissolved gases and air. 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.
RE series vortex pumps can be used for slightly contaminated liquids in sewage treatment plants, fertilizers, viscous liquids in the food or chemical industry, general industry, sugar, paper, steel, in refineries and power plants.
| Pump capacity: | up to 500 m3/h |
| Lifting height: | up to 50 m |
| Maximum working pressure: | 10 bar |
| Temperature: | up to 220 °C – depending on the pumped medium |
| Discharge nozzle: | from DN 80 to DN 125 |
| Impeller type: | open channel |
| Pump materialss: | AISI 316 stainless steel, GJL250 cast iron Optional: Superduplex, AISI 904L |
| Industry | Application example |
| Food and sugar industry | Sticky and viscous liquids |
| Wastewater treatment | Wastewater suspensions with solid particles |
| Paper industry | Pulp transfer up to 8% |
| Chemical industry | Slightly contaminated media |
Salvatore Robuschi RE are multi-channel centrifugal pumps with open impeller, equipped with bearings compliant with EN ISO 5199. Pumping of solid suspensions, high viscosity liquids, low NPSH values and high efficiency are the main features of this series, which can achieve excellent performance even in critical conditions. Seria ta może zagwarantować excellent performance even with liquids with a high content of dissolved gases and air.
The geometry of the blades has been designed to optimize the internal speed of the impeller, improving pump performance even in the case of viscous liquids and solid transfer.
RE series centrifugal pumps have a modular design that allows for reduced spare parts and storage costs. These pumps are designed in accordance with ISO 2858/5199 standards, making them interchangeable with other machines manufactured to these standards. All Salvatore Robuschi vortex series have one sealing housing for all types of seals – they 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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REM |
REL |
REB |
Monoblock version with standard B5 electric motor. |
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. |
Shaft version: pump with independent oil or grease lubricated bearings, coupling (short or spacer), base and motor. |
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 500 m3/h |
| Lifting height: | up to 50 m |
| Maximum working pressure: | 10 bar |
| Temperature: | up to 220 °C – depending on the pumped medium |
| Discharge nozzle: | from DN 80 to DN 125 |
| Impeller type: | open channel |
| Pump materialss: | AISI 316 stainless steel, GJL250 cast iron Optional: Superduplex, AISI 904L |