Alfa Laval Pump

Compact
and reliable design

ALP pumps are characterised by a compact design consisting of few components reducing the complexity of the pump using less spares and easing the handling. Furthermore, screws of hardened material enable tight internal tolerances which will ensure stable pump capacity over time.

Alfa Laval ALP pump range

Alfa Laval ALP three-screw pumps are developed for lowest operating cost and highest reliability with specific focus on the marine industry. ALP is the obvious choise for handling of fuel and lubricating oils.

Typical marine and industrial low pressure applications are:
Supply and circulation of fuel, ranging from gas oil to heavy fuel oils
Transfer of fuel oil on board ships, in power stations and oil facilities
Oil circulation in hydraulic systems
Lubricating oil circulation for cooling and separation
Circulation of lubricating oil for diesel engines, gearboxes, etc.

Compact and reliable design

Designed for low/lowest cost of ownership

A superior and fully tested shaft seal design optimizes the lubrication of the seal faces and improves air evacuation. The seal chamber is built to efficiently prevent building up of residue. This combined with the use of a high quality ball bearing, positioned outside the product zone reduces the risk of thermal impacts and avoids exposure to the pumped liquid. Maintenance requirements are reduced to a minimum.

User-friendly design

Very simplified disassembly and assembly of the pump enable easy and quick inspection, maintenance and service.

Magnetic drive version

The ALP pump range is also available in a magnetic drive version. The magnetic coupled design eliminates the risk of any leakage and a seal-less design reduces maintenance to a minimum.

Polger Authorized Alfa Laval Distributor

Polger is an authorized distributor of Alfa Laval equipment and systems for the marine industry. We provide reliable solutions for fuel and oil handling, water treatment, heat transfer and onboard installations.

How it works

Podstawową zasadą działania pompy śrubowej ALP jest to, że obracające się śruby izolują ciecz i transportują ją. Transport odbywa się zatem poprzez osiowe przemieszczenie zamkniętych przestrzeni.

Operating principle

Three-screw pumps are rotary positive displacement pumps. By the meshing of the three rotating screws and the enclosing pump casing, the displacement effect is created. The screws are radially supported by the sliding contact in the casing, which requires lubrication by the pumped liquid. The axial support of the main screw is carried out by a ball bearing.

The pump is equipped with an internal relief valve which will limit the differential pressure and protect the pump from excessive pressure. On the Alfa Laval ALP pumps the valve setting will be fixed at a specific opening pressure to avoid any risk of wrong pressure setting after installation.