Alfa Laval Alfa Laval LKH
Alfa Laval LKH hygienic centrifugal pumps, in 13 sizes (LKH-5 … LKH-90), with flow rates up to 500 m³/h and differential pressures up to 11 bar at 50 Hz, for dairy, food, beverages and personal care.
The LKH is Alfa Laval's hygienic centrifugal pump, designed for cleaning in place (CIP). The manufacturer's leaflet indicates it for the dairy, food, beverage and personal care industries, where the product must be treated gently. The steel parts in contact with the product (casing, impeller, nut, back plate) are in W. 1.4404 (AISI 316L), the impeller is semi-open, and the standard seal is a single mechanical seal, with flushed or double variants.
The pump is specified by size (LKH-5, -10, -15, -20, -25, -35, -40, -45, -50, -60, -70, -85, -90), connections, impeller diameter, motor size, voltage and frequency, flow rate, pressure and temperature, the density and viscosity of the product, and options. With a request for quotation, send these data or a photo of the pump nameplate; we confirm the code and availability in the quotation.
Models and codes
| Code | Note |
|---|---|
| LKH-5 | the first size in the range; maximum inlet pressure 6 bar (600 kPa). |
| LKH-10 … LKH-60 | maximum inlet pressure 10 bar (1000 kPa); with the double mechanical seal, barrier water up to 5 bar. |
| LKH-70 | maximum inlet pressure 10 bar at 50 Hz and 5 bar at 60 Hz; with the double seal, barrier water up to 3 bar. |
| LKH-85 | maximum inlet pressure 5 bar (500 kPa); with the double seal, barrier water up to 3 bar; the connection of the flushed or double seal is Ø6 mm (¼ inch). |
| LKH-90 | maximum inlet pressure 5 bar (500 kPa); with the double seal, barrier water up to 3 bar. |
Key specifications
| Sizes in the range | 13 (LKH-5 … LKH-90) |
|---|---|
| Maximum flow rate | up to 500 m³/h |
| Maximum differential pressure at 50 Hz | up to 11 bar |
| Materials in contact with the product | steel W. 1.4404 (AISI 316L); EPDM elastomers; stationary sealing face of silicon carbide, rotating face of carbon |
| Temperature range (EPDM) | -10 … +140 °C |
| IEC motor with feet and flange | 0.75 – 110 (50 Hz and 60 Hz); IP 55, insulation class F kW |
| Motor speed, 2 poles | 900 – 4000 (0.75–45 kW); 900 – 3600 (55–110 kW) min⁻¹ |
| Motor speed, 4 poles, 0.75–75 kW | 900 – 2200 min⁻¹ |
| Flushed seal: water pressure at inlet | maximum 1 bar |
| Water consumption for flushed or double seal | 0.25 – 0.5 l/min |
| Flushing medium temperature | maximum 70 °C |
| Available connections | ISO 2037 clamp, ISO union (IDF), DIN/ISO, SMS, (BS)RJT, DS, DIN/DIN; ASME BPE clamp on LKH-85 and LKH-90 |
The Alfa Laval LKH product leaflet (200013268-3-EN-GB) has metadata created on 26.03.2026 and is published on the manufacturer's official document server; the LKH pump appears in the range of centrifugal pumps shown on the Alfa Laval website (checked on 06.11.2026).
Frequently asked questions
How do I choose the size of an LKH pump?
The manufacturer's leaflet has a diagram of head versus flow rate for all 13 sizes, at 50 Hz and 3000 min⁻¹. It helps us to know the flow rate, pressure, temperature, density and viscosity of the product; we confirm the size and motor in the quotation.
What types of seal are there?
The standard is a single mechanical seal; the leaflet also mentions the flushed single seal and the double mechanical seal. The front-loaded seal, with the spring and washers on the atmospheric side, is replaced in a few minutes, according to the leaflet.
What data do I send for a quotation?
The size or a photo of the pump nameplate, the connection type, the motor power and voltage, the flow rate, pressure and temperature, the pumped product and the options required. When ordering, the lead time is usually 1–4 weeks; we confirm availability and the exact lead time in the quotation.
Other Alfa Laval series
The page uses the LKH product leaflet (5 pages); dimensions per motor type, the other variants of the LKH range, connection dimensions for each size and detailed curves are confirmed to you by code, from the manufacturer's documentation.
Updated: 2026-11-12