ISEM ball segment valve

Hosokawa Micron has developed the unique Hosokawa ISEM ball segment valve as an in- and outlet valve for mixers and vacuum dryers. This valve is gas, dust and liquid tight, has no flow resistance when opened and is easy to clean and access. The full bore passage, the housing without static pockets and the sealing designs make it the best valve for applications where reliability of the valve sealing is a key issue.

ISEM ball segment valve

The ISEM valve has proven its reliability under difficult conditions and is a very popular valve for process installations using vacuum or pressure in combination with solvents or toxic materials. The ISEM valve has also been adopted by other machine manufacturers as an addition to their own mixers, dryers and reactors.

  • Charge and discharge valve for mixers, (vacuum) dryers, sterilisation systems, reactors, storage silos and piping for e.g. poisonous, corrosive and flammable products and processes.
  • Pre-dosing valves in packing systems, coarse metering of product flows.
  • Barrier valve in process installations.
  • Flip-flop valves for powder dosing in pressurized systems. 

Types of products

  • Dry powders
  • Wet powders & filter cakes 
  • Pastes
  • Liquids
  • Full-bore product opening.
  • Heavy duty design, long operating life time.
  • No static pockets and dead zones where product can store, minimal clearances towards rotating parts possible.
  • Seal access without taking apart the valve.
  • Closable in dynamic product column.
  • Dimensions: available from 75 to ~800 mm, ANSI and DIN.
  • Design pressure: full vacuum to 6 bar(a).
  • Design temperature -20°C / 200°C (higher temperatures on request).
  • Design: ATEX zone 20-22  and 1-2 (powders and gasses).
Type Length [mm] Width [mm] Height [mm] Fullbore
DN 75 200   200 80
DN 125 665 442 205 132
DN 150 676 467 225 160
DN 200 709 578 290 210
DN 250 742 643 325 260
DN 300 917 790 405 310
DN 350 943 845 430 358
DN 400 978 938 470 405


Other designs

On request:
  • Actuator: manual, ISEM lever type, pneumatic / electrical actuators / high torque actuators provided with e.g. position governor.
  • Shape: sanitary design, easy cleaning, droplet shape, angled, double acting single drive, double acting twin drive, single body or welded design, "easy-removable" hinged design, customized designs possible!
  • Heating / cooling: heated/cooled valve housing and or ball segment.
  • Cleaning: manual, CIP, SIP, WIP.
  • Sealing modules: modular sealing system, process sealing static or dynamic (inflatable/retractable) for maximum lifetime and sealing properties.
  • Shaft sealing: lip-seals / o-ring / double sealing with inert gas barrier / leakage detection.
  • Materials of construction: available stainless steel types like AISI 304/316 (L/Ti), alloys etc.
  • Sealing materials: common available elastomers like viton, silicone, EPDM, FFKM and also PTFE, other FDA approved materials etc.

Manual operation is available for ISEM valves up to DN 250

  • All valves are also available with ANSI flanges
  • Over DN 400 on request

Several different versions are available either in welded or cast execution:

  • Spherical
  • Cylindrical
  • Conical

Test units are available.

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Related Applications

Hosokawa Micron B.V. designs and manufactures mixing, drying and agglomeration equipment and systems for the powder and bulk processing industry.

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