General options
The strainer’s connections have to match the line – not the other way round. We manufacture with exactly the connection type your pipeline requires: flange to DIN or ANSI, butt-weld end, thread, dairy pipe union or clamp connection. This eliminates adapters and fitting pieces entirely.
DIN EN 1092-1
ANSI CL150 – CL300
DIN EN 12627
EN 558-1 or made to measure
Standard strainers force the plant into a compromise: if the connection type does not match, adapters, additional pairs of flanges or transition pieces are installed. Every additional joint means another potential leak point, more installation length and additional gaskets in the maintenance schedule.
Because we manufacture every strainer as a one-off, the connection becomes part of the design. You specify the nominal size, standard, pressure rating and – if required – the exact face-to-face length; we design the housing and connection together and test them as one unit.
The connection type determines how the strainer is fitted into the line – and how quickly it can be removed again for cleaning.
The standard. Sealing face form B1 to DIN, RF for ANSI. Weld neck flanges for higher pressure ratings. Face-to-face length to EN 558-1 series 1 or to your installation dimension.
For a permanent connection without a pair of flanges. Saves face-to-face length and sealing points – used mainly for large nominal sizes and in district heating lines.
The most compact solution for small nominal sizes. Also available as a combination: housing DN50 with 1 inch female-threaded nozzles.
Detachable union that can be released without tools, smooth internal contour. Also available as a weld-on end.
Clamp ring, Tri-Clamp or clamp flange. Opening and closing without tools, crevice-free seal for plants with frequent cleaning.
Couplings such as the Perrot system, process connections that differ from the housing nominal size, earthing lugs for flammable media or laterally offset nozzles.
| Connection type | Standard and design |
|---|---|
| Metric flange | DIN EN 1092-1 type 01 |
| US flange | ANSI CL150 – CL300, RF |
| Butt-weld ends | DIN EN 12627 · ANSI |
| Thread | Male thread · NPT threaded socket |
| Connection type | Standard and design |
|---|---|
| Dairy pipe union | DIN 11851 |
| Clamp connection | aseptic, crevice-free |
| Face-to-face length | EN 558-1 series 1 or made to measure |
| Sealing faces | Spigot/recess · tongue/groove on request |
When replacing an existing strainer, if the installation length and flange pattern are fixed and the line is not to be modified. Likewise in plants supplied internationally, where metric and ANSI standards meet. And wherever cleaning is frequent: clamp connections can be released without tools and leave no crevices in which residues can collect.
Yes. Before production starts, you receive the design drawing for approval – the drawing also shows the connection type, flange pattern and face-to-face length. Only once you have confirmed it does the order go into production. We incorporate any requested changes beforehand.
Of course. Drawings, specifications, parts lists or the data sheet of the previous strainer are the best basis. Our design engineers adopt your requirements and adapt them where manufacturing or the applicable code requires it – we agree any deviations with you in advance.
Yes. For example, we combine an ANSI flange at the inlet with a DIN flange at the outlet when the plant changes standard at that point.
As a rule, yes. Send us the installation dimension between the flanges – we design the strainer so that it fits without modifying the pipeline.
The standard is form B1 (raised face) to DIN EN 1092-1, for ANSI the RF version. Tongue/groove and other facing types are available on request.
Yes – the connection is made in the housing material, so also in duplex, Monel or Hastelloy.
Yes, this often even makes sense: a larger housing increases the screen area and lowers the pressure drop, while the connection follows the line – for example a DN300 housing with a DN100 process connection.
All topics at a glance: Strainer options
Tell us the nominal size, standard, pressure rating and the existing installation dimension – we design the strainer so that it fits without modifying the pipeline.
