Our duplex strainers (duplex filters) enable the continuous filtration of liquids, viscous and gaseous media – without interrupting operation. Production takes place in close cooperation with Industriefabrik Schneider GmbH, which stands for the highest quality and flexible special solutions in filter construction. As a fittings factory, we not only supply the appropriate filters, but also the associated fittings – including modification, automation and accessories. This means you receive an optimally coordinated complete system from a single source.
Customized design for every application and every medium.
Matching fittings and accessories supplied and modified on request.
Switchable filter unit for continuous filtration.
Heating jacket, quick-release fastener, differential pressure monitoring, automation and more.
Production according to DGRL, AD2000, EN 1090 – with complete documentation.
Quick filter change, easy cleaning and long service life.
Hygienic versions, CIP/SIP-capable, for water, syrup, juices, milk and process media.
Filtration of aggressive or viscous media, high temperature and pressure requirements, special materials.
Condensate, process media – uninterrupted operation thanks to switchover function.
Protection of pumps, storage tanks and treatment systems, continuous filtration.
Filtration of crude oil, gas, condensate, protection of compressors and pipelines.
Robust filters for demanding operating conditions and high pressures.
| Feature | Values / Options | Notes / Standards |
| Materials | Stainless steel (1.4571/316Ti, 1.4404/316L), steel, special materials | Selection per medium, temperature, standard |
| Nominal sizes (DN) | DN 50 to DN 300 (butterfly valves), DN 50 to DN 150 (ball valves) | Flanges according to DIN EN 1092-1, ANSI B16.5 |
| Nominal pressures (PN) | PN 6 / 10 / 16 / 25 / 40 (standard); PN 6 / 10 / 16 / 40 (ball valves) | DIN EN 1092-1, AD2000 |
| ANSI Class | Class 150 / 300 (other classes on request) | ASME B16.5 |
| Temperature range | -10 °C to +50 °C (standard); higher temperatures on request | Stainless steel: high temperatures possible |
| Filter inserts | Fine sieve, coarse sieve, various mesh sizes (0.05-10 mm), pleated or smooth | Replaceable, individually manufactured |
| Changeover | Manual (4 butterfly valves or 2 ball valves), automated (pneumatic actuator) | Switchable without interrupting operation |
| Options | Heating jacket, quick-release fastener, differential pressure indicator, feet, inspection openings, magnetic rod | Extensive range of accessories |
| Approvals | PED 2014/68/EU, AD2000 HP0, EN 1090, DIN ISO 3834-3, CE 0045, Module A2/G | Certificates see Quality & Standards |
For viscous or temperature-sensitive media.
For quick maintenance and cleaning.
For monitoring the filter status.
Various mesh sizes, materials and designs.
For the separation of magnetic particles.
For maintenance and cleaning during operation.
Pneumatic or electric actuators for the switching function.
Clamp, milk pipe, thread, butt weld ends.
For safe installation and handling.
Double switchover filters enable uninterrupted operation by combining two filter chambers with a switchover function. While one chamber is being cleaned or serviced, the other remains in use – so the process is always protected and filtration is guaranteed at all times.
As a valve manufacturer, we supply double duplex filters as individual components or as a complete system – modified, automated or with matching valves on request.
Our duplex strainers are manufactured to the highest quality standards – in cooperation with Industriefabrik Schneider GmbH.
We have all the relevant certificates and approvals:
For liquids, viscous media and gases – from water and chemicals to oils and foodstuffs.
Nominal sizes from DN 50 to DN 300 (butterfly valves), DN 50 to DN 150 (ball valves), nominal pressures up to PN 40 (depending on version).
Yes, we offer manual and automated switching functions (pneumatic/electric).
Yes, we manufacture according to your specifications – e.g. flange, clamp, milk pipe, thread or butt weld ends.
We accompany you through all project phases, from the initial inquiry to consultation and design through to production, delivery and acceptance.
You can also find detailed technical information, special solutions and practical examples on our partner pages:
