DUPLEX FILTERS

Manual duplex filters for solid-liquid separation

cost efficient duplex filter
DD Duplex Filter (DF 20) und Duplex Filter (DF 40)

Robust filter solutions for industrial solid-liquid filtration applications

Our duplex filters reliably protect plate heat exchangers, pumps, piping systems, microfiltration systems, and end products – making a valuable contribution to environmental protection. They enable continuous filtration of a wide range of media: from cooling and process water to oils, emulsions, or waters contaminated with mussel larvae. With their robust design, reduced maintenance requirements, and versatile applications, they redefine solid-liquid separation – efficiently, safely, and economically. 

Request product

Download brochure now

Technical data of the
duplex filter 20

Flow rate

max. m³/h

Filter fineness

> µm

Operating pressure

0 to bar

Flanges

DN 25 to

Manual cleaning

Yes

Filter housing

Cast iron

Our duplex filters at a glance

 

Duplex Filter 20

WITH MANUAL SWITCHING

The Duplex Filter DF 20 enables solid-liquid filtration with manual switchingwithout interrupting operation. This industrial filter impresses with its compact inline design, easy cleaning, and is ideal for applications with limited space. 

Request duplex filter 20

DD Duplex Filter (DF 20)


DD Duplex Filter (DF 40)

Duplex Filter 40

AVAILABLE IN A VARIETY OF MATERIALS

The Duplex Filter DF 40 offers the same advantages as the DF 20, complemented by a greater variety of materials and individually adaptable flange connections. This makes this industrial water filter particularly suitable for customer-specific applications in demanding environments. 

Request Duplex Filter 40



Technical data of the
Duplex Filter 40

Flow rate

max. m³/h

Filter fineness

> µm

Operating pressure

max. 0 to bar

Flanges

DN 15 to

Manual cleaning

Yes

Filter housing

Steel, stainless steel, GRP, plastic



Advan­tages



The double filters offer an economical solution for demanding filtration tasks - without compromising on quality and performance. Thanks to their efficient design, the initial investment costs can be significantly reduced, allowing you to make the most of your budget and benefit from an overall cost-effective implementation.

The filter systems are specially designed for continuous industrial use and reliably withstand even high loads and aggressive media. This significantly extends the service life of the system - in many cases even doubling it. At the same time, you reduce your total operating costs by up to 30 % and cut the disposal costs for old systems in half.

Manual switching allows continuous filter cleaning during operation – without the need to stop production or for pressure loss.

Even the finest particles are reliably filtered out - for consistently high media purity and maximum availability of your system. This allows filtration to be flexibly adapted to different requirements and operation to be efficiently optimized.

Thanks to the wide range of materials - from steel and stainless steel to glass fiber reinforced plastic - the filter systems can be adapted precisely to different media and environments. Whether aggressive chemicals, seawater or neutral applications: You always get the right solution without having to forego the advantages of the tried and tested filter system.

The quickly replaceable filter bags with variable fineness from 1 to 300 µm allow filtration processes to be flexibly adapted. This ensures exceptionally clean results, reduces maintenance requirements and permanently lowers operating costs - ideal for demanding applications.

Key features of the separators

Key features of the duplex filters

Duplex filters for maximum operational reliability

Sectional view of the DD Duplex Filter (DF 20)

Differential pressure indicator for filter monitoring

The integrated differential pressure indicator continuously monitors the pressure difference between the inlet and outlet and indicates at an early stage when cleaning is required. This allows you to plan maintenance work in advance, avoid unexpected breakdowns and ensure long-term operation. Performance drops are detected in good time so that you can react quickly and reduce your maintenance costs in the long term.

Space-saving inline design (DF 20)

The DF 20 duplex filter impresses with its slimline inline design, which enables space-saving integration into existing piping systems. Thanks to its sophisticated design, the filter can be easily retrofitted - without the need for costly modifications to the system structure. This allows you to reliably safeguard your operation even in the event of maintenance or malfunctions, reduce unplanned downtime and cut downtime costs to a minimum.

Single filters for solid liquid separation
DD Single Filter EF 15 and Single Filter EF 30
Sectional view of DD Duplex Filter DF 40

Individually adaptable connections (DF 40)

The Duplex Filter DF 40 offers maximum flexibility: inlet and outlet flanges can be adapted to customer requirements. This simplifies integration into a wide range of system environments and reduces installation effort.

Die Separatoren in Aktion


The Duplex Filters in action



DD Duplex Filter (DF 40)
DD Duplex Filter (DF 20)
DD Duplex Filter (DF 40)
DD Duplex Filter (DF 40)
DD Duplex Filter (DF 40)
DD Duplex Filter (DF 40)



Structure of the Filterautomat

Robust construction of the duplex filters




Filter element

The filter basket of the duplex filter consists of a perforated plate, with an additional wire mesh incorporated depending on the filter fineness. This makes both higher and lower degrees of fineness down to 10 microns possible.

Filter element preforated plate

Shut-off valve

A shut-off valve is used to separate the dirty filter from the flow so that it can be cleaned. The second filter is in filtration mode during cleaning.





Downloads

Downloads

Manual filters brochure.pdf

3,16 MB

Form of tender DF 20.docx

0,02 MB

Form of tender DF 40.docx

0,02 MB

Questionnaire for filter projects.pdf

0,07 MB







Contact

CONTACT


Are you interested in our product?
Then contact us via contact form, post@dds-filter.com or +49 271 401 4123.
 We look forward to your inquiry!

Ich habe die Datenschutzerklärung zur Kenntnis genommen und erkläre mich damit einverstanden, dass die von mir angegebenen Daten elektronisch erhoben und gespeichert werden. Meine Daten werden dabei nur streng zweckgebunden zur Bearbeitung und Beantwortung meiner Anfrage benutzt. Mit dem Absenden des Kontaktformulars erkläre ich mich mit der Verarbeitung einverstanden.