Alfa Laval LKH Self-Priming Pumps
The LKH Prime from Alfa Laval is an efficient, versatile, and hygienic self-priming pump. Its design was based on the market-leading LKH family and shares many of the same features. Add in that it can easily and efficiently pump fluids with entrained air, and you have a CIP power house.
The LKH Prime uses advanced design and air screw technology to meet the most stringent requirements commonly found in food, dairy, beverage, home and personal care. These industries insist that pump be versatile and able to perform in the toughest applications.
The LKH Prime is EHEDG and 3-A approved while remaining a cost-effective option for applications where air will be entrained.
Models
- LKH Prime
- LKH Prime UltraPure
LKH Prime is available in size 10, 20, and 40, and additional sizes may become available at a later date.
Alfa Laval is a leading global supplier of products and solutions within the key technology areas of heat transfer, separation, and fluid handling.
Application
The LKH Prime is a highly efficient self-priming pump, which meets 3-A Sanitary Standards. The ability to evacuate air from the suction pipe—combined with a low noise level and high pumping efficiency—makes the LKH Prime ideal for tank emptying and CIP return applications; and, with verified effective CIP cleanability, LKH Prime can be used as a product pump as well.
Operating principle
On applications where the pumped media contains a mixture of air and liquid in the suction line, air-screw rotation causes the formation of a continuous liquid ring within the canister. Due to the eccentric position of the canister relative to the air-screw, an air chamber forms between the liquid ring and the air-screw, which separates into air pockets between the air-screw vanes.
The continuous rotation of the air-screw forces air pockets through the canister into the suction stage of the impeller; they are then pumped out via the discharge. Liquid is returned from the discharge via the re-circulation pipe into the canister to ensure the liquid ring is maintained at all times. When there is no air present, the canister and recirculation loop have no function and are fully filled with liquid. The liquid passes through the canister into the suction stage of the impeller, allowing the pump to act as a traditional centrifugal pump.
Standard design
Based on the LKH, the LKH Prime is designed to be cleaned in place. Unlike conventional self-priming pumps the LKH Prime has an impeller which can be trimmed for any application.
Shaft seals
The LKH Prime is equipped with either an external single or a double mechanical shaft seal. Both have stationary seal rings made from stainless steel AISI 329 with sealing surface in silicon carbide and rotating seal rings in carbon as standard.
Energy efficient
Using the combination of advanced air-screw technology, optimized impeller, and casing geometry, Alfa Laval LKH Prime exceeds industry expectations for quiet, efficient operation, reduced energy consumption, and CO2 footprint. Alfa Laval LKH Prime is engineered to meet the most stringent standards and hygienic requirements.
Premium Pump Platform
A further addition to the market leading Alfa Laval LKH pump platform, Alfa Laval LKH Prime is characterized by superior performance, high quality and reliability for improved operational productivity.
Meets Global Standards
Quiet in operation, Alfa Laval LKH Prime is engineered to meet the most stringent standards and hygienic requirements.
Easy to Maintain
The pump is easy and cost effective to service and maintain. By sharing common parts with other Alfa Laval LKH range pumps, Alfa Laval LKH Prime offers low cost of ownership and increased uptime, backed up by the security that comes from Alfa Laval’s global service network.
Construction
Alfa Laval LKH Prime is a self-priming pump based on air-screw technology. It offers excellent operational efficiency, reducing energy consumption. The pump achieves capacities of up to 308 gpm and pressures of up to 56 psig. The pump shares many common components with the Alfa Laval LKH pump range including the impeller, which can be trimmed to optimize pump performance according to its application. Dedicated components include the airscrew, casing, re-circulation pipe and cover.
Pump Sizing
To correctly size a pump, some essential information is required. Provision of the information listed below enables our customer support personnel to determine the optimum pump selection:
- Fluid to be pumped
- Viscosity
- SG/Density
- Pumping temperature — minimum, normal, and maximum
- CIP temperature(s) — minimum, normal, and maximum
Materials
| Product Wetted Steel Parts | 316L |
| Other Steel Parts | 304 |
| Finish | Polished ≤ 32 Ra |
| Product Wetted Seals | EPDM, FPM (Viton), NBR (Buna or Rubber) |
Technical Data
| Max Inlet Pressure | 72.5 psi |
| Temperature Range | 14°F – 284°F (EPDM) |
| Water Pressure Inlet (Seal Flush) | Max 72.5 psi |
| Water Consumption (Seal Flush) | 4 – 8 gph |
| Pumping Product Motor Speed (No Air) | 900 – 3600 rpm |
| Air Evacuation Motor Speed | 2800 – 3600 rpm |
Product Resources
See all resources by Alfa LavalLiterature
Blog Posts
Spare Parts
- LKH Prime Shaft Seal Parts
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Part LKH Prime 20 LKH Prime 40 Diagram Key Tool, Complete 9612137101 9612137101 - Seal Housing 9612133904 9612133904 40a Screw for Seal Housing 9611990203 9611990203 41 Tube 9612358916 9612358917 42 Drive Ring, Single Shaft Seal 9614206001 961406001 10 - LKH Prime Service Kits
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Seal Type C/SIC or SIC/SIC EPDM NBR FPM Single, LKH Prime 20 C/SIC 9611927175 9611927176 9611927177 Single, LKH Prime 40 C/SIC 9611927210 9611927211 9611927212 Single, LKH Prime 20 SIC/SIC 9611927178 9611927179 9611927180 Single, LKH Prime 40 SIC/SIC 9611927213 9611927214 9611927215 Double, LKH Prime 20 C/SIC 9611927181 9611927182 9611927183 Double, LKH Prime 40 C/SIC 9611927216 9611927217 9611927218 Double, LKH Prime 20 SIC/SIC 9611927184 9611927185 9611927186 Double, LKH Prime 40 SIC/SIC 9611927219 9611927220 9611927221 - LKH Prime Seal Kits
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Seal Type C/SIC or SIC/SIC EPDM NBR
FPM Single C/SIC 9612129609 9612129610 9612129611 Single SIC/SIC 9612129639 9612129640 9612129635 Double Mechanical C/SIC 9612129613 9612129614 9612129615 Double Mechanical SIC/SIC 9612129636 9612129637 9612129638 - LKH Prime Motor Dependent Parts
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Part 3-5 Hp 7.5-10 Hp 15-20 Hp 25-30 Hp 40-60 Hp Diagram Key Compression Ring with Thread 9612133602 9612133606 9612133603 9612133603 9612133604 5a Compression Ring w/o Thread 9612133702 9612133706 9612133703 9612133703 9612133704 5b Screw 9611993196 9611993197 9611993198 9611993198 9611993198 6 Washer 9611993199 9611993199 9611993199 9611993199 9611993199 6a Shaft LKH Prime 20 9615230407 9615230408 9615230409 N/A N/A 7 Shaft LKH Prime 40 N/A
N/A 9615422901 9615422901 9615423101 7 Stud Bolt 9615230301 9615230301 9615230301 N/A N/A 7a Connex Pin 9611990622 9611990622 9611990622 9611990622 9611990622 8 Adaptor 9612342901 9612343001 9612343101 9612343102 9612342602 16 Screw for Adaptor 9611994412 9611994413 961199444 9611994414 9611994415 17 Washer for Adaptor 9611994417 9611994417 9611994417 9611994417 9611994418 19 Safety Guard Set 9614077405 9614077412 9614077409 9614077409 9614077409 22 Leg Bracket 481661 481663 481665 481669 9634056195 70 - LKH Prime Wet End Spare Parts
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Part LKH Prime 20 30-20 HP
LKH Prime 40 15-60 HP
Diagram Key Pump Casing, Mech. Ra ≤ 32, Tri-Clamp 9615262002 9615262004 29 Pump Casing, Mech. Ra ≤ 20, Tri-Clamp 9615262006 9615262008 29 Front Cover, Mech. Ra ≤ 32, Tri-Clamp 9615262102 9615262104 60 Front Cover, Mech. Ra ≤ 20, Tri-Clamp 9615262106 9615262108 60 O-Ring, EPDM 9615217301 9615441501 59 O-Ring, NBR 9615217303 9615441503 59 O-Ring, FPM 9615217302 9615441502 59 Recirculation Pipe, Mech. Ra ≤ 32 9615202004 9615202003 56 Recirculation Pipe, Mech. Ra ≤ 20 9615202005 9615202004 56 O-Ring, EPDM 9615261501 9615261501 55 O-Ring, NBR 9615261503 9615261503 55 O-Ring, FPM 9615261502 9615261502 55 Clamp Set 9611311057 9611311058 57 Air Screw, Mech. Ra ≤ 32 9615216504 9615216703 58 Air Screw, Mech. Ra ≤ 20 9615216507 9615216704 58 Cap Nut 9611992592 9611992593 24 Spring Washer 9611991888 9611991887 24a Bolt 9611992168 9611992169 28 O-Ring, EPDM 9611992141 9611992171 26 O-Ring, NBR 9611992143 9611992173 26 O-Ring, FPM 9611992142 9611992172 26 Impeller, Mech. Ra ≤ 32 9612131418 9612131816 37 Impeller, Mech. Ra ≤ 20 9612131406 9612131806 37 O-Ring, EPDM 9611992145 9611992145 38 O-Ring, NBR 9611992147 9611992147 38 O-Ring, FPM 9611992146 9611992146 38 Back Plate, Mech. Ra ≤ 32 9612138421 9612138422 25 Back Plate, Mech. Ra ≤ 20 9612138435 9612138438 25 Nut 9611990353 9611990353 20 Washer 9611992559 9611992559 21
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