LKH Centrifugal Pump Series
The LKH is Alfa Laval's workhorse sanitary centrifugal pump — 14 sizes covering everything from a CIP return line to a high-capacity process transfer. Every size shares the same hygienic 316L wetted construction and configures across seals, elastomers, motors, and special executions. Match your current motor below, then build the exact model.
Replacing an Existing Pump?
Enter your current motor's horsepower to see the sizes that take that motor. Sizing a new application by flow and head? A CSI application engineer matches against the manufacturer's curves — send us the duty.
LKH Sizes
| Speed | Ports | Orderable builds | Configure | ||
|---|---|---|---|---|---|
| LKH-5 | 1–3 | 3,500 RPM | 1.5" | 44 | Configure |
| LKH-10 | 2–5 | 3,500 RPM | 1.5"–2" | 44 | Configure |
| LKH-15 | 3–7.5 | 3,500 RPM | 2" | 44 | Configure |
| LKH-20 | 5–10 | 3,500 RPM | 2"–2.5" | 44 | Configure |
| LKH-25 | 7.5–15 | 3,500 RPM | 2.5" | 44 | Configure |
| LKH-35 | 10–25 | 3,500 RPM | 2.5"–3" | 44 | Configure |
| LKH-40 | 15–40 | 3,500 RPM | 3" | 44 | Configure |
| LKH-45 | 20–50 | 3,500 RPM | 3"–4" | 44 | Configure |
| LKH-50 | 25–60 | 3,500 RPM | 4" | 44 | Configure |
| LKH-60 | 40–75 | 3,500 RPM | 4" | 44 | Configure |
| LKH-70 | 50–100 | 3,500 RPM | 4"–6" | 44 | Configure |
| LKH-75 | 60–125 | 3,500 RPM | 6" | 44 | Configure |
| LKH-80 | 75–150 | 3,500 RPM | 6" | 44 | Configure |
| LKH-90 | 100–200 | 3,500 RPM | 6" | 44 | Configure |
- LKH-5Configure
- Motor
- 1–3 HP
- Speed
- 3,500 RPM
- Ports
- 1.5"
- Orderable builds
- 44
- LKH-10Configure
- Motor
- 2–5 HP
- Speed
- 3,500 RPM
- Ports
- 1.5"–2"
- Orderable builds
- 44
- LKH-15Configure
- Motor
- 3–7.5 HP
- Speed
- 3,500 RPM
- Ports
- 2"
- Orderable builds
- 44
- LKH-20Configure
- Motor
- 5–10 HP
- Speed
- 3,500 RPM
- Ports
- 2"–2.5"
- Orderable builds
- 44
- LKH-25Configure
- Motor
- 7.5–15 HP
- Speed
- 3,500 RPM
- Ports
- 2.5"
- Orderable builds
- 44
- LKH-35Configure
- Motor
- 10–25 HP
- Speed
- 3,500 RPM
- Ports
- 2.5"–3"
- Orderable builds
- 44
- LKH-40Configure
- Motor
- 15–40 HP
- Speed
- 3,500 RPM
- Ports
- 3"
- Orderable builds
- 44
- LKH-45Configure
- Motor
- 20–50 HP
- Speed
- 3,500 RPM
- Ports
- 3"–4"
- Orderable builds
- 44
- LKH-50Configure
- Motor
- 25–60 HP
- Speed
- 3,500 RPM
- Ports
- 4"
- Orderable builds
- 44
- LKH-60Configure
- Motor
- 40–75 HP
- Speed
- 3,500 RPM
- Ports
- 4"
- Orderable builds
- 44
- LKH-70Configure
- Motor
- 50–100 HP
- Speed
- 3,500 RPM
- Ports
- 4"–6"
- Orderable builds
- 44
- LKH-75Configure
- Motor
- 60–125 HP
- Speed
- 3,500 RPM
- Ports
- 6"
- Orderable builds
- 44
- LKH-80Configure
- Motor
- 75–150 HP
- Speed
- 3,500 RPM
- Ports
- 6"
- Orderable builds
- 44
- LKH-90Configure
- Motor
- 100–200 HP
- Speed
- 3,500 RPM
- Ports
- 6"
- Orderable builds
- 44
Technical Specifications
Shared across the series — a specific size and build is confirmed on its datasheet and in the configurator.
- Capacity (mfr. published)
- Up to 2,200 GPM (500 m³/h)
- Head (mfr. published)
- Up to 370 ft (160 m)
- Max inlet pressure
- 87 psi (LKH-5) · 145 psi (LKH-10–90)
- Temperature range
- 14°F – 284°F (EPDM)
- Wetted materials
- 316L stainless steel
- Other steel parts
- 304 stainless steel
- Surface finish
- ≤ 32 Ra · 3-A approved
- Shaft seals
- External single, single-flushed, or double mechanical
- Seal faces
- Carbon / SiC, AISI 329 hardware
- Elastomers
- EPDM, FPM (Viton), NBR, or PTFE
- Connections
- Tri-Clamp, weld, or DIN / SMS
- Noise level
- 60 – 85 dB(A)
Industries & Applications
Industries served
Typical applications
- Sanitary product transfer and processing
- CIP / COP supply and return
- Filling and packaging line feed
- Pressure boosting and circulation
- Gentle handling of shear-sensitive product
LKH Resources & Downloads
49 datasheets, performance curves, manuals, spare-parts lists, certificates, videos, and guides — covering every size and execution in the series.
- How to read a centrifugal pump curveArticleRead
- Which sanitary pumps are most common in high-purity applications?ArticleRead
- How return pumps are used during clean-in-placeArticleRead
- What is pump cavitation, and how do I avoid it?ArticleRead
- Newtonian vs. non-Newtonian fluid dynamics in processingArticleRead
- Top 5 things to know: how to size a pump properlyArticleRead
LKH FAQ
If you're replacing a pump, enter your current motor's horsepower in the filter above to find the sizes that take that motor. For a new application, send your flow, head, fluid, and temperature to a CSI engineer, who sizes against the manufacturer's performance curves and returns the exact model with a quote.
Standard covers general hygienic process duty; Prime self-primes for tank emptying and air-entraining lines; UltraPure is a documented, certified build for biopharma and WFI systems; Multi-Stage stacks impellers for high head; Evap is tuned for low-NPSHr boiling duty; and the high-pressure LKHPF is reinforced for elevated system pressures. You choose the execution when you configure a size.
The LKH runs 316L wetted construction with a ≤ 32 Ra hygienic finish and is available in 3-A and EHEDG-compliant builds. Exact certification depends on the seal, elastomer, and connection you choose, so confirm the final configuration with our team.
Yes. The LKH's hygienic design drains and cleans well, and it's widely used both to circulate CIP solution and as a process pump that's cleaned in place. For combined product-transfer and high-velocity CIP in a single unit, ask us about twin-screw alternatives.
Single, single-flushed, and double mechanical shaft seals, with EPDM, FPM (Viton), NBR, or PTFE elastomers to match your product and CIP chemistry. The configurator walks through the options for the size you pick.
CSI stocks common baseline builds that usually ship in 1–2 days; other catalog builds are made to order — contact us and we'll confirm availability with the quote.
Need Help Sizing Your Pump?
Tell us about your application — duty point, fluid, temperature, solids, and how the system runs all factor in — and a CSI pump engineer will work out the right model, performance curve, and quote, often the same day.