Pumps Automation

Hygienic liquid ring pumps SP-LR

The SP-LR self-priming liquid ring pumps are specially designed for pumping liquids with a high air or gas content. An excellent example of this are CIP-Return applications in the food-, dairy-, beverage- and pharmaceutical industry.

Ultra clean

All liquid touching parts of the SP-LR pumps are compliant with the relevant standards. The open impellers are provided with pressure relief holes, which at the same time ensure an optimal cleaning of the shaft seal and the seal chamber. The impeller is ‘dry’ mounted to the shaft by means of  O-rings. The applied O-ring constructions are designed to minimise the liquid contact and at the same time to provide an optimal cleaning of the contact faces.

Depending on the application range, but always compliant with the hygienic standards, the SP-LR-line can be executed with several options:

  • Several mechanical seal types and materials
  • Many O-ring materials
  • Surface roughness < 0,8 micron, optional < 0,5 micron
Max. viscosity < 500 cP
Capacity < 50 m³/h
Pressure < 40 mlc
Impeller Radial
Materials Wetted parts: 1.4404
Connections 2" / DN50 to 2,5" / DN65

Couplings: DIN11851, DIN11864-1, SMS1145

Flanges: EN1092-1, DIN11864-2, ANSI

Tri-Clamps: ISO2852, DIN32676, DIN11864-3

Shaft sealing Single, double quench/flush, Inner and outer, EHEDG. according to DIN24960
Sealing materials carbonl/CrM, carbon/SiC, SiC/SiC, Tc/Tc
Elastomers EPDM, Viton, NBR, Teflon, KALREZ, e.g.
according to FDA
Surface roughness         Standard < 0,8 micron, optional < 0,5 micron
Motor options Standard: IEC, IE3, B3/B5, IP55, isolcl. F, PTC         
Optional: IE4, noise reduction


Internal EHEDG single mech. seal Internal EHEDG single mech. seal with Quench
Brochure SP-LR
Manual SP-LR