Pomac liquid ring pump
Pumps for air‑loaded fluids
The SP‑LR self‑priming liquid ring pump is engineered for hygienic processes, reliably handling liquids with high air or gas content—ideal for CIP‑return in food, dairy, and beverage applications. All product‑contact parts are stainless steel and EHEDG‑compliant. The open impeller and optimized O‑ring design ensure superior cleanability. Multiple mechanical seal options, surface finishes, and motor executions—including ATEX—allow precise adaptation to demanding hygienic pumping tasks.
Core capabilities of liquid ring pumps
Engineered for hygienic performance with self‑priming capability, modular design, EHEDG‑approved seals, and reliable operation in demanding CIP‑return processes.
Self-priming
Efficiently handles air‑ or gas‑laden liquids, ensuring reliable CIP‑return performance for hygienic processes.
Unique modular design
Modular pump design with multiple mechanical seal types and O‑ring materials for perfect process fit and reliable hygienic performance.
Shaft seals comply with EHEDG standards
Hygienic shaft‑seal options meet strict EHEDG standards, offering safe, clean operation with single internal or quench‑equipped mechanical seal designs.
CIP-return application
Designed for efficient CIP‑return flow in hygienic plants, ensuring smooth recovery of cleaning liquids across food, dairy, and beverage systems.
Excellent cleanability
Open impeller enables optimal cleaning of the shaft and seal chamber; O - ring design minimizes liquid contact while improving cleanability.
Fully stainless-steel product-contact surfaces
Standard 1.4404 stainless steel; optional upgrades available for even higher chemical resistance.
Robust, adjustable and hygienic drive setup
Close coupled stainless steel encased motor with adjustable feet and balanced stub shaft.
Options
Mechanical seals
Multiple seal types and materials allow precise adaptation to process needs while maintaining full hygienic compliance.
O-ring material choices
A wide selection of O‑ring materials ensures compatibility with various media and temperatures for safe, reliable hygienic operation.
Optimized surface finish
Surface roughness below 0.8 μm, optionally 0.5 μm, supports superior cleanability and meets strict hygienic processing requirements.
Construction options
- Close coupled stainless steel encased motor
- Adjustable stainless steel feet
- Bearing housing execution
Available in ATEX and noise reduced versions
Suitable for explosive atmospheres and noise sensitive areas.
Material options for wetted parts
- Standard: stainless steel 1.4404
- Optional: 1.4435 or Hastelloy C22 (2.4602)
Overview Performance and dimensions
Pomac liquid ring pumps performance curves
Pomac liquid ring pumps dimensions
Technical Data
| Type | c2 | p3 | P[kW] | a [mm] | b [mm] | c [mm] | e [mm] | f [mm] | g [mm] | h [mm] | i [mm] |
|---|---|---|---|---|---|---|---|---|---|---|---|
| SP-LR 186-1 | 2" | 2" | 2,2 | 32 | 390 | 234 | 32 | 200 | 80 | 102 | 134 |
| SP-LR 186-1 | 2" | 2" | 3 | 32 | 390 | 234 | 32 | 200 | 80 | 102 | 134 |
| SP-LR 186-2 | 2" | 2" | 3 | 32 | 390 | 234 | 32 | 200 | 80 | 102 | 146 |
| SP-LR 186-2 | 2" | 2" | 4 | 32 | 390 | 234 | 32 | 200 | 80 | 102 | 146 |
| SP-LR 186-2 | 2" | 2" | 5,5 | 32 | 452 | 234 | 32 | 250 | 80 | 102 | 166 |
| SP-LR 232-1 | 2,5" | 2,5" | 7,5 | 32 | 452 | 241 | 42 | 250 | 94 | 131 | 168 |
| SP-LR 232-2 | 2,5" | 2,5" | 7,5 | 32 | 452 | 241 | 42 | 250 | 94 | 131 | 168 |
| SP-LR 232-2 | 2,5" | 2,5" | 11 | 128 | 447 | 318 | 42 | 320 | 94 | 131 | 196 |
Industries
Pompe e impianti per l'industria alimentare e delle bevande
LEWA supporta produttori e imprese di costruzione di impianti nelle industrie alimentari e delle bevande con pompe e sistemi per l'omogeneizzazione e dispersione, oltre che per altre operazioni di lavorazione nel settore alimentare. Lavoriamo con voi per definire tutte le operazioni di processo fondamentali, come trasferimento, dosaggio, miscelazione, riscaldamento e raffreddamento, in modo che possiate per trasformare le vostre materie prime ad un costo conveniente.
More Details
Brochure LEWA Food & Beverage Industry (EN-North America)
Maximize your food and beverage production with advanced industrial flow technologies and
dedicated expert support.
6 MB
| pdf |
15.03.2026
Brochure LEWA Food & Beverage Industry (EN-Rest of World)
Maximize your food and beverage production with advanced industrial flow technologies and
dedicated expert support.
6 MB
| pdf |
15.03.2026
