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FDS

Positive Displacement Pump

Dual Purpose Twin Screw Pump

By developing this exceptional pump, we intended to set new standards in double-screw technology.

We started by rethinking the technical and functional principles of this highly sophisticated type of pump from the ground up. We continued by thoroughly analyzing each and every component, refining the design until we had perfected its every aspect and every functionality.

We have eliminated the previously known deficiencies of this technology and optimized key aspects such as smooth running, temperature stability, maintenance and repair. Consequently, we can offer you a unique product that has been refined down to the most minute detail.

The Fristam FDS combines all the advantages of double-screw technology with our company’s traditionally high quality standards. It is suitable for a wide range of applications and offers maximum flexibility.

This very special positive displacement pump is ideal for the most viscous products. At the same time, it is capable of reaching higher speeds of up to 3,600 RPM. Consequently, it can transport significant amounts of any low-viscosity medium, for example water or detergent solution. This renders the use of an additional pump for cleaning processes obsolete. The Fristam FDS can handle extreme viscosities as well as the highest loads effortlessly and easily copes with high differential pressures without overheating.

Its axial transportation principle results in very low pulsation even in the highest pressure ranges. In addition, the FDS ensures superior hygiene as its mechanical seals are positioned in fully flushed areas with constant pressure conditions. Because there are no cavities, there is no residue when flushing the pump in CIP. Our latest pump is not only fully hygienic, but can also be sterilized.

Thanks to its compact size and specially designed bearings the Fristam FDS can be mounted horizontally as well as vertically. Inspection and maintenance have never been as simple as this: seals and conveying elements can be exchanged easily and quickly. The use of high-quality materials combined with Fristam’s usual solid workmanship ensures superior reliability.

Mechanical Seals

The FDS’ mechanical seals are fully immersed in the flowing medium. Their smart layout ensures improved protection from leakages with both single- and double-acting seals. The semi-cartridge principle, in combination with the clever design of the pump casing in three segments, make mounting and replacing seals simpler than ever. If needed, they can be removed and loaded through the front with just a few quick and easy steps.

Sophisticated Casing

The three-piece pump casing of the Fristam FDS consists of an intermediate flange, the screw casing and the pump cover. This layout allows previously unimaginable flexibility when it comes to connection types and individual adaptation to system requirements. Furthermore, it is specifically configured for easy access and maintenance. The FDS offers maximum efficiency with extremely tight internal clearances.

Maximum Flexibility

With its wide range of feed screws featuring various pitches, the Fristam FDS offers maximum flexibility. This pump is suitable for a great range of applications and capable of meeting the most diverse requirements as well as the highest standards. Furthermore, its well thought-through design opens up previously unimagined freedom with many possibilites for mounting as well as easy access and maintenance.

Especially Solid Shaft

When constructing the shaft, we specifically focused on adding strength in the area of its critical diameter. This ensures maximum rigidity even under the most difficult conditions and results in an especially smooth run, along with lower operating temperatures also under elevated pressure. Ultimately, it expands the FDS’ lifespan significantly.

Sophisticated Gearbox

When designing the gearbox, we put a special emphasis on creating a smart yet hands-on layout. Access to the synchromesh gear is facilitated through a cover that can be removed easily with just a few turns of a screw. The pump can be kept in its position, and even moving the drive becomes unnecessary. Thanks to its specially designed bearings, the FDS offers previously unimagined simplicity with regard to all gear-related maintenance procedures.

FDS Model Specifications

Max. discharge pressure [bar (PSI)]

20 (290)

Maximum flow rate [m3 /h (gpm)]

20 (88)

Max. rotation speed [RPM]

3,600

Connection [mm (in)]

15 – 50
(.5 – 2)

Max Viscosity

1,000,000 cps

Rotation

Reversible

Temperatures

Up to 150°C (302°F) standard, 220°C (428°F) optional

Mounting

Horizontal (standard), vertical and sideways optional

Mechanical seals

Single and double (flushed or pressurized)

Feed screws

6

Max. particle size standard/ extended [mm (in)]

18/26
(0.7/1.0)

Options

High-pressure, ATEX, heated jacket, special surface
treatments, electropolishing, rectangular inlet, custom
adaptations to specific products, processes and systems

Max. discharge pressure [bar (PSI)]

25 (363)

Maximum flow rate [m3 /h (gpm)]

40 (176)

Max. rotation speed [RPM]

3,600

Connection [mm (in)]

40 – 80
(1.5 – 3)

Max Viscosity

1,000,000 cps

Rotation

Reversible

Temperatures

Up to 150°C (302°F) standard, 220°C (428°F) optional

Mounting

Horizontal (standard), vertical and sideways optional

Mechanical seals

Single and double (flushed or pressurized)

Feed screws

8

Max. particle size standard/ extended [mm (in)]

26/36
(1.0/1.4)

Options

High-pressure, ATEX, heated jacket, special surface
treatments, electropolishing, rectangular inlet, custom
adaptations to specific products, processes and systems

Max. discharge pressure [bar (PSI)]

25 (363)

Maximum flow rate [m3 /h (gpm)]

100 (440)

Max. rotation speed [RPM]

3,600

Connection [mm (in)]

65 – 100
(2.5 – 4)

Max Viscosity

1,000,000 cps

Rotation

Reversible

Temperatures

Up to 150°C (302°F) standard, 220°C (428°F) optional

Mounting

Horizontal (standard), vertical and sideways optional

Mechanical seals

Single and double (flushed or pressurized)

Feed screws

9

Max. particle size standard/ extended [mm (in)]

32/48
(1.3/1.9)

Options

High-pressure, ATEX, heated jacket, special surface
treatments, electropolishing, rectangular inlet, custom
adaptations to specific products, processes and systems

Max. discharge pressure [bar (PSI)]

25 (363)

Maximum flow rate [m3 /h (gpm)]

180 (793)

Max. rotation speed [RPM]

3,000

Connection [mm (in)]

80 – 150
(3 – 6)

Max Viscosity

1,000,000 cps

Rotation

Reversible

Temperatures

Up to 150°C (302°F) standard, 220°C (428°F) optional

Mounting

Horizontal (standard), vertical and sideways optional

Mechanical seals

Single and double (flushed or pressurized)

Feed screws

8

Max. particle size standard/ extended [mm (in)]

41/57
(1.6/2.2)

Options

High-pressure, ATEX, heated jacket, special surface
treatments, electropolishing, rectangular inlet, custom
adaptations to specific products, processes and systems

Media

Fruit Cocktail Unloading and Transfer
Tomato Paste Unloading and Transfer
Fristam PD Pumps Family
FDS maintenance Video
media image 4

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