Category: Industry Trends

Standard design

The MR Liquid-Ring Pump consists of pump casing, casing cover

and impeller made of acid-resistant, duplex-grade steel; EPDM,

FPM or NBR elastomers; stainless steel cap nuts, legs, leg

brackets, and adapter; and, stainless steel shroud with noise

absorbing interior lining protecting the motor. All models have an

external mechanical single seal.

A proportion of the centrifuged liquid is retained around the

periphery and re-circulates, forming a liquid ring that is used to

maintain the prime.

Working principle

The Alfa Laval MR Pump uses the principles of centrifugal force to

operate. However, instead of directing fluid into a ring- or volute

type casing around the periphery, the MR Liquid-Ring Pumps

transfer the fluid into channels on either side of the impeller, in the

front plate and back plate of the pump.

These side channels increase in volume as the impeller passes

the suction port, creating a vacuum and drawing in the liquid. This

volume is then automatically reduced at the discharge port,

creating pressure and forcing the liquid out, thereby providing the

pumping action.

Introduction

The Alfa Laval MR is a well proven liquid-ring pump specifically

developed for effective pumping of liquids with entrained air. The

construction of the MR makes it perfectly suited for use as a return

pump in CIP systems.

Applications

The Alfa Laval MR pump is specifically designed for pumping

liquids that contain air or gas and is most commonly used for CIP

return applications across the food, dairy, beverage and

pharmaceutical industries.

The MR pump is available in three sizes to handle capacities up

to 80 m3/h and differential pressures up to 5 bar at 50Hz.

Benefits

• Ideal for CIP return applications: well-proven design suited to

handle liquids with entrained air.

• Easy to operate: excellent suction capability ensures limited

impact on performance from changing fluid characteristics.

• Long service life: heavy-duty design used in CIP systems for

decades.

Benefits

• Energy efficient: superior efficiency resulting in reduced energy

consumption and CO2 footprint.

• Hygienic: designed according to the most stringent hygienic

design standards and with verified effective CIP cleanability.

• Wide performance envelope: reduce need for parallel and

serial pump installations and ensure pump operating with high

efficiency.

• High inlet pressure: designed for inlet pressures up to 16 bar

and can therefore be used in systems with higher pressure

rating.

Standard design

All media contacting steel components like pump casing,

impeller, impeller nut and backplate are in W. 1.4404 (AISI 316L).

A stainless steel shroud protects the motor and four adjustable

stainless steel legs support the complete unit.

A compression coupling securely attaches the stub shaft to the

motor shaft with precision alignment, and the semi-open impeller

with a special vane design ensures efficient and gentle handling

of the product as it moves through the pump.

As standard, the LKHI pump is equipped with an internal single

mechanical shaft seal but is also available with a flushed shaft

seal. The secondary seal of the flushed seal is a long-lasting lip

seal. The front-loading shaft seal makes maintenance fast, easy

and inexpensive. It takes just a few minutes to replace the shaft

seal. In addition, the balanced design minimizes the risk of seal

opening during unforeseen pressure shock.

Introduction

The Alfa Laval LKHI Centrifugal Pump for 16 bar Inlet Pressure is a

is a premium pump for use in hygienic applications with inlet

pressures up to 16 bar. To increase process productivity, it is

distinguished by high efficiency, gentle product treatment,

chemical resistance, and a wide range of flow rates, pressures

and options.

Precision-engineered, the LKHI pump delivers greater energy

efficiency than similar premium pumps. Its optimized design,

premium motor, tight tolerances and advanced impeller design

minimize recirculation and reduce energy consumption.

Applications

Designed for inlet pressures up to 16 bar and for Cleaning-in

Place (CIP), the Alfa Laval LKHI is ideal for higher pressure

hygienic applications within the dairy, food, beverage and

personal care industries that require gentle product treatment

and reliable operation.

The LKHI pump is available in nine sizes to handle capacities up

to 240 m3/h and provide differential pressures up to 8 bar at 50

Hz.

Working principle

On applications where the pumped media contains a mixture of

air and liquid in the suction line, airscrew rotation causes the

formation of a continuous liquid ring within the canister. Due to the

eccentric position of the canister relative to the airscrew, an air

chamber forms between the liquid ring and the airscrew, which

separates into air pockets between the air-screw vanes.

The continuous rotation of the airscrew forces air pockets through

the canister into the suction stage of the impeller which are then

pumped out via the discharge.

Liquid is returned from the discharge via the recirculation 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.

Benefits

• Energy efficient: superior efficiency resulting in reduced energy

consumption and CO2 footprint.

• Hygienic: designed according to the most stringent hygienic

design standards and with verified effective CIP cleanability.

• Maximized uptime and reduced maintenance costs: robust

mechanical design and ease of maintenance with modular

front-loading seals.

• Conforms to the provisions of ATEX directive: can be used in

potentially explosive environments.

Standard design

All media contacting steel components like pump casing,

impeller, impeller nut and backplate are in W. 1.4404 (AISI 316L).

A stainless steel shroud protects the explosion proof motor and

four adjustable stainless steel legs support the complete unit.

A compression coupling securely attaches the stub shaft to the

motor shaft with precision alignment, and the semi-open impeller

with a special vane design ensures efficient and gentle handling

of the product as it moves through the pump.

As standard, the LKHex pump is equipped with a single

mechanical shaft seal, but is also available with a double

mechanical shaft seal. The front-loading shaft seal, with the

spring and washers mounted on the atmospheric side, makes

maintenance fast, easy and inexpensive. It takes just a few

minutes to replace the shaft seal. In addition, the balanced design

minimizes the risk of seal opening during unforeseen pressure

shock.

Introduction

The Alfa Laval LKHex Centrifugal Pump is a premium pump for

use in hygienic applications which must meet the requirements of

the ATEX directive 2014/34/EU group II, category 2G,

temperature class T3 and T4. To increase process productivity, it

is distinguished by high efficiency, gentle product treatment,

chemical resistance, and a wide range of flow rates, pressures

and options.

Precision-engineered, the LKHex pump delivers greater energy

efficiency than similar pumps. Its optimized design, premium

motor, tight tolerances and advanced impeller design minimize

recirculation and reduce energy consumption.

Applications

The LKHex is engineered for use in potentially explosive

environments and conforms to the provisions of the ATEX

directive 2014/34/EU group II, category 2G, temperature class

T3 and T4. With verified effective CIP cleanability, it is ideal for

hygienic applications within the dairy, food, beverage and

personal care industries that require gentle product treatment

and reliable operation.

The Alfa Laval LKHex pump is available in 10 sizes to handle

capacities up to 250 m3/h and differential pressures up to 11 bar

at 50 Hz.

Standard design

All media contacting steel components like pump casing,

impeller, airscrew, front cover, recirculation pipe and backplate are

in W. 1.4404 (AISI 316L) with material traceability 3.1 according

to EN 10204. Product wetted elastomers are specified to USP

Class VI, 121°C, Chapter 88 and Chapter 87. A stainless steel

shroud protects the motor and four adjustable stainless steel legs

support the complete unit.

A compression coupling securely attaches the stub shaft to the

motor shaft with precision alignment, and the semi-open impeller

with a special vane design ensures efficient handling of the

product as it moves through the pump.

As standard, the LKH prime pump is equipped with a single

mechanical shaft seal but is also available with a double

mechanical shaft seal. The front-loading shaft seal, with the

spring and washers mounted on the atmospheric side, makes

maintenance fast, easy and inexpensive. It takes just a few

minutes to replace the shaft seal. In addition, the balanced design

minimizes the risk of seal opening during unforeseen pressure

shock.

Introduction

The Alfa Laval LKH Prime UltraPure Centrifugal Pump is

designed for use in high-purity applications where high efficiency,

exceptional cleanability, contamination safety, robust design and

low maintenance are of paramount importance.

Precision-engineered, the LKH Prime UltraPure delivers greater

energy efficiency than similar pumps. Its optimized design,

premium motor, tight tolerances and advanced impeller and

airscrew design minimize recirculation and reduce energy

consumption.

Applications

The Alfa Laval LKH Prime UltraPure is designed to meet the

stringent demands and regulations of high-purity applications

across the biotechnology and pharmaceutical industries that

require equipment with the highest material integrity. It is ideal for

tank emptying and CIP return applications; it has verified and

effective CIP cleanability. The LKH Prime UltraPure can also be

used as a product pump.

All pumps are delivered with a complete Alfa Laval Q-doc

package. Q-doc provides easier validation, proof of origin and

compliance for inspection purposes according to Good

Manufacturing Practice (GMP) and ASME BPE requirements.

The LKH Prime UltraPure pump is available in two sizes to handle

capacities up to 70 m3/h and differential pressures up to 4 bar at

50 Hz.

Benefits

• Energy efficient: superior efficiency resulting in reduced energy

consumption and CO2 footprint.

• Quiet: operates very quietly compared to other self-priming

pumps, thereby improving the working environment.

• Low contamination risk: comes with full material traceability

and USP Class VI elastomers to reduce risk of process

contamination from extractables.

• Smooth qualification, validation and process control: material

traceability, and pump supplied with the Alfa Laval Q-doc

package in line with Good Documentation Practices (GDP).

Introduction

The Alfa Laval LKH-110. LKH-110P and LKH-120P pumps are

highly efficient multistage centrifugal pumps for use in hygienic

applications. Precision-engineered and available with up to four

stages, these LKH Multistage Pumps deliver high energy

efficiency. Their optimized design, premium motor, tight

tolerances and advanced impeller design minimize recirculation

and reduce energy consumption.

Applications

Available in two-, three or four-stage models, the LKH Multistage

Pumps save space and energy by replacing up to three booster

pumps in a line. Used primarily in high-pressure applications with

low capacity, they withstand system pressures up to 40 bar and

deliver differential pressures up to 19 bar at 50 Hz. Designed for

Cleaning-in-Place (CIP), the pumps are suitable for, but not

limited to, many types of filtration applications across the food,

beverage, home-personal care, biotechnology and

pharmaceutical industries.