Autopress (AP)

For absolutely gas-tight and safe filtration

The BHS Autopress (type AP) efficiently separates even difficult-to-filter suspensions in batch production. Its mode of operation resembles that of a filter press, but the Autopress works absolutely gas tight and fully automatic, including cake discharge. The filter can be integrated with a fully tight and self-contained process (also GMP-compatible), thus also meeting requirements regarding sterility, explosion prevention, workplace safety or validation with ease.

The filter cake can be processed further, including washing, extraction, pressing, blowing out and drying. The thinness of the cake and a complete filtration process without any residues facilitate high throughput rates. As an additional benefit, the filter cake has a low residual moisture content. The BHS Autopress washes the cake efficiently, ensuring a pure product free of cross-contamination.

For each BHS Autopress of type AP, the design and actual filter surface are determined for each project in order to deliver an optimal filter solution for customers and their applications.

Process criteria:

Operating method intermittent
Operating pressure up to 10 bar (g)
Operating temperature up to 150°C
Solids content (suspension) up to 10% (wt.)
Cake thickness up to 15 mm
Particle size 0.5–50 μm
Filter performance – suspension up to 5 m³/m² h
Filter performance – dry solids
Active filter surface 0.2–5 m²
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Downloads

Technical data sheet “Autopress (AP)” (PDF / 80 KB)
Technical data sheet “Autopress (AP)”

Technical data on Autopress (AP)

Size: 80 KB
"Filtration technology" questionnaire (PDF / 27 KB)
"Filtration technology" questionnaire

Questionnaire to describe your filtration application, serves as a specification for drawing up a quotation or performing filtration tests.

Size: 27 KB

Advantages

  • Batch production
  • Several successive process steps
  • Self-contained, gas-tight production
  • Suitable for suspensions containing solvents
  • Excellent workplace hygiene and safety
  • Validated operation, suitable for pharmaceutical final products
  • Fully automatic operation

BHS filtration technical center

Link to tests at BHS technical center

Technical article

Thin-cake filtration technology to meet full containment for air-sensitive and toxic chemical and pharmaceutical production

PharmaChem
1/2 2016 (January/February)
February 2016
PDF (3.5 MB)
Thin-cake filtration technology to meet full containment for air-sensitive and toxic chemical and pharmaceutical production

In many chemical and pharmaceutical processes, solid-liquid separation, cake washing and drying steps directly impact the effectiveness of the production operation. Further complicating these operations is the nature of the process and especially if the process is air-sensitive or toxic. This article discusses the choice of thin-cake (2-25 mm) pressure separation technology for full containment, no residual heel and their benefits to optimizing the effectiveness of the production process. For full containment, the paper then continues with a discussion of clean-in-place operations to meet current Good Manufacturing Practices (cGMP) guidelines including riboflavin test, validations and ANSI/ISA S88 and IEC 61512-1 batch process control systems.

Size: 3.5 MB

Clean-in-place operations for thin-cake filtration technologies

PharmaChem
May 2005
May 2005
PDF (328 KB)
Clean-in-place operations for thin-cake filtration technologies

This article discusses the choice of thin-cake (2-25 mm) separation technologies and their benefits to optimizing the effectiveness of the production process. The paper continues with a discussion of clean-in-place operations to meet current Good Manufacturing Practices (cGMP) guidelines including riboflavin test and validations. ANSI/ISA S88 (and IEC 61512-1 in the international arena) batch process control system standards are also examined. Finally, factory and site acceptance testing is described.

Size: 328 KB

Evaluating thin-cake pressure filtration using the BHS Autopress technology

Chemical Processing Magazine
April 2002
April 2002
PDF (1.6 MB)
Evaluating thin-cake pressure filtration using the BHS Autopress technology

Thin-cake pressure filtration technology offers an alternative to agitated nutsche filters and centrifuges for solid-liquid separation,cake washing, and drying. Complicating this process is the number of competing technologies and options that can be employed to accomplish these steps. For example, most pharmaceutical processes will use either an agitated nutsche filter or a centrifuge for the separation and washing step. This article discusses the use of the thin-cake Autopress pressure filter as an alternative to agitated nutsche filters and centrifuges. The results are applicable to specialty chemical and other applications with similar process crystals and requirements.

Size: 1.6 MB
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