Rotary Lobe Pump SLR


The SLR pump is a positive displacement rotary lobe pump of a sanitary design suitable for use in the dairies, food-processing, beverage, cosmetics, pharmaceutical and fine chemicals industries. This rotary lobe pump is perfect for managing all kinds of fluid, of either low or high viscosity, as well as for filtering and bottling applications. Products containing fragile solids such as junket can be pumped without damage thanks to the specially designed lobes.

Operating principle

The SLR rotary lobe pumps basically consist of two lobe rotors which rotate synchronously inside a casing without touching each other. As the rotors rotate, the spaces between the lobes and the casing are successively filled with the product, which is transported to the discharge nozzle with a fixed amount of displacement. The pumped fluid forms a continuous stream thanks to the tolerances between the lobes and the pump casing, thus ensuring an efficient pumping.




Design and features

Horizontal support.
Bare-shaft construction.
Stainless steel casing and lobes.
Tri-lobe rotors.
Sanitary design of the attachment of the rotors.
Sanitary mechanical seals.
Easy cleaning and maintenance.
Standard connections: DIN 11851. 


Parts in contact with the product: AISI 316L
Bearing support: GG 25
Gaskets: EPDM according to FDA 177.2600
Mechanical seal: SiC/C/EPDM
Internal surface finish: Ra ≤ 0,8 µm
External surface finish: bright polish


Mechanical seals: SiC/SiC or TuC/SiC.
Cooled mechanical seal, pressurised double mechanical seal, lip seal or O-ring seal.
Gaskets in FPM and PTFE.
Relief valve on the front cover or external by-pass.
Bi-wing lobes.
Heating chamber.
Isolation can.
Vertical support.
Rectangular nozzle.
Various kinds of drives and protections (gearbox drive with optional frequency converter, pulley/mechanical drive speed selector).
Trolley and/or control panel.
Connections: clamp, SMS, RJT, etc.
ATEX version available.