International Processing Trade Fair for Powder, Bulk Solids, Fluids and Liquids

26 - 28 September 2023 // Nuremberg, Germany

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Exhibitors & Products POWTECH 2023
Zoom Image LOGO_BOLZ Conical Screw Vacuum Dryer, - Mixer & - Cooker

BOLZ Conical Screw Vacuum Dryer, - Mixer & - Cooker

LOGO_BOLZ Conical Screw Vacuum Dryer, - Mixer & - Cooker

BOLZ Conical Screw Vacuum Dryer, - Mixer & - Cooker

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Series MF 010 - MF 1200

The BOLZ-SUMMIX conical screw dryer is a vacuum contact dryer. Due to its contained closed system and indirect heating of the product it is particularly suited for drying hazardous and toxic products to a very low final moisture content. As a result of its unique, very gentle mixing character, even mechanically sensitive products are not destroyed. The product quality after the drying process is reproducible and as good as that of the initial product, whereas the driving forces required are very low.

The achievable, high endvacuum ensures low drying temperatures which is a clear advantage when drying temperature-sensitive products. It also ensures good heat transfer rates and short drying times, while at the same time requiring only little energy. The short drying times and the high containment level of the fully closed system make the conical dryer the best choice in instances where environmental and/ or product requirements are strict and remarkably high.

Special properties for the customer’s benefit:

  • Fully closed contained system
  • Very high containment level, almost 100% solids and solvent recovery
  • Operator safe, product and environment friendly
  • Wide product flexibility as well suited for multi-product/ multi-process application
  • High process flexibility in the range of drying, mixing, homogenizing, re-wetting etc.
  • Very gentle product handling
  • Optimized CIP facilities with complete liquid drain and verified CIP reproducibility
  • Short drying times given by a minimize screw-to-wall clearance
  • Improve of the product quality and reduction of the drying time by use of a heated mixing screw
  • Almost 100% product discharge by gravity
  • Filling volume 10-100% of working capacity
  • Low drive power compared to other systems
  • Reliable drive systems with proven sealing system
  • Safe and ATEX compliant
  • Clean room installation in the feed area or the dryer discharge area is possible
  • Various options and design details

Conical Screw Mixer

Series SF 010 – SF 3000

The BOLZ-SUMMIX conical screw mixer works according to the proven principle of a rotating mixing screw being guided along the wall of the conical vessel at constant close distance by means of an orbital arm. The product flow maintains an intense yet gentle mixing and product displacement. Suited for demanding bulk solids of the pharmaceutical, chemical and food industries, it ensures a unique and gentle mixing process.

Special properties for the customer’s benefit:

  • Small drive power without mechanical or thermal product demolition by wear/attrition
  • High mixing result and effciency, perfect blending and good mixing time
  • Unique suitability for a wide range of industrial products with various character like density, particle size and shape, proportions etc. without risk of segregation
  • Maximum flexibility with just partial load from 10 to 100%
  • Well suited for multi-product application and frequently changing product volume
  • Central, unrestricted and residue-free product discharge with a homogeneous product flow
  • Good cleanabilty with a complete and residue free drain of cleaning fluids

Conical Screw Cooker

Series DF 050 - DF 600

Mixing, stirring, cooking and sterilising are basic operations in food production and processing. The BOLZ-SUMMIX cookers with their conical construction and rotating mixing screw, have proven particularly useful for processing natural products such as coffee beans, cocoa nibs, gluten or nuts such as chestnuts. Various processes can be realised such as a heat treatment process by direct steam injection and heated jacket with continuous mixing, injection/absorption of process liquid, cooking and sterilising as well as extraction of components.

Special properties for the customer’s benefit:

  • Short process time with gentle and effective product mixing and intensive heat transfer
  • Injection of steam via a ring channel
  • Vacuum and pressure rated equipment
  • Total drain of solid and liquid in a short time
  • Flexible hence suited for a wide range of products, process and heat treatment
  • Quick adding of required process liquids

BOLZ Conical Screw Vacuum Dryer, - Mixer & - Cooker is assigned to following product groups:


The products and/or services can be used in the following branches of industry.

POWTECH offers concrete solutions for packaging-intensive industries. Industry guide


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