Reliable production of intermediates

Top performance and efficiency

BHS-Sonthofen has decades of experience and comprehensive process engineering know-how in the manufacture of plastic intermediates. Our rotary pressure filters (type RPF) and indexing belt filters (type BF) offer you high throughput rates and process reliability over the long term. The total operating costs are very low, despite achieving exceptional product quality.

Benefits at a glance:

  • High production output
  • Consistently high quality
  • High system availability and reliability
  • Low total operating costs

High product quality and availability

One of the world's largest rotary pressure filters of type RPF X 20 with 9m² filter area

High product quality and availability

Whether you are processing polyamides, terephthalic acid (PTA), aramids, polymers, bisphenol or other plastic intermediate products: Continuously operating high-performance filters deliver high product quality due to the excellent washout quality they provide. The filters have a long service life, are built for robust use and ensure economical plant operation thanks to the low maintenance and energy costs they incur. Operating temperatures of up to 160 °C with the rotary pressure filter and filter surfaces of up to 100 square meters with the indexing belt filter go a long way toward ensuring efficient production.

World leader in the production of PTA

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World leader in the production of PTA

BHS-Sonthofen leads the market in this field. A large share of the global production of terephthalic acid, better known as PTA (purified terephthalic acid), passes through BHS filters. Our high-performance filters are used for this purpose across the world.

Our filters in use

Rotary pressure filter (RPF)

A single rotation of the drum entails a number of different process steps, demonstrating the many facets of filtration.

Indexing belt filter (BF)

This type of vacuum filter is particularly gentle on sediments.


Tests give certainty

Which technology is the right one for your process? Don’t leave anything to chance. Based on your specifications, we carry out testing and identify the best solution for you in our filtration laboratory.



14.06.-18.06.2021 | Frankfurt am Main (Germany)
Hall 5, Booth C34

Satisfied customers worldwide


Find a sales representative

Find your personal contact person on site. We are there for you worldwide.

Find a sales representative

Find your personal contact person on site. We are there for you worldwide.