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HLR Rotary Lobe Pump

  • Overview
  • Features & Benefits
  • Specifications
  • Other Info


The HLR pump is a rotary lobe pump designed in compliance with EHEDG specifications for plants and processes that meet the strictest hygienic standards. Due to their low rotational speeds, lobe pumps are characterised by a gentle pumping action and low shear rate of the product, thereby causing the least damage possible. The HLR series rotary lobe pump is designed for the transfer of all types of liquids (from 1 to 1,000,000 cP) and liquids with solid particles (curd, biologic cultivations, etc.). The HLR series is the ideal choice for applications in the food-processing, cosmetic and pharmaceutical industries.

Design and Features

  • Vertical support
  • Bare-shaft construction
  • Self-drainable pump
  • Tri-lobe rotors
  • Hygienic design of the attachment of the lobes
  • Sanitary mechanical seal, internal assembly
  • The seal is removed without disassembling of the pump casing
  • Easy cleaning and maintenance
  • Standard connection: clamp
  • Pump certified according to EHEDG standards


  • Investment casting casing and lobes: AISI 316L
  • Ball 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 seal: SiC/SiC, TuC/SiC
  • Flushed or balanced mechanical seal
  • Gaskets: FPM or FFPM
  • Bi-wing lobes. Relief valve or external by-pass
  • Heating jacket
  • Ra ≤ 0.5 μm surface finish for pharmaceutical applications
  • Horizontal assembly (no EHEDG certificate)
  • Various types of drives and protections (gear motor with frequency converter, etc.)
  • Assembly on a 304 stainless steel baseplate, sanitary design
  • Trolley and control panel
  • Connections: Clamp DIN 32676, DIN 11864-1, DIN 11864-2, etc
  • Material certificates (3.1), roughness certificate
  • The pump can be ATEX certified
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