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SISTO-C Diaphragm valve
Diaphragm valve


Diaphragm valve with butt weld ends or clamps; straight-way, Y or T pattern, or as a multi-port valve; shut-off and sealing to atmosphere by completely enclosed diaphragm. No dead volumes, suitable for sterilisation, SIP/CIP-compliant design, position indicator. All moving parts are separated from the fluid by the diaphragm. Maintenance-free.
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Main Applications

  • Chemical industry
  • Homogenisation
  • Food industry and beverage industry
  • Pharmaceutical industry
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Technical Data

  • Nominal pressurePN 16
  • Max. nominal sizeDN 100
  • Max. allowed fluid temperature160 °C


  • Reliable sealing ensured by one single sealing element (the diaphragm) which provides hermetic sealing to atmosphere and absolutely tight shut-off. The specially enclosed diaphragm ensures long service life and high operating reliability.
  • Special design: All moving parts are separated from the fluid by the diaphragm.
  • Compact valve design with integrated actuator requires minimal space.

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TitleFormatSizeLast change
Sterile processes catalogue (8652.10_EN)PDF7.784/19/2021
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ATEX Declaration (8630.8512_EN)pdf0.515/24/2019
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TitleFormatSizeLast change
Type series booklet SISTO-C (8644.1_EN)PDF2.094/20/2021

Technical Data

  • FunctionShut off/control flow
  • Connection typeClamped connection, Butt weld ends
  • Design concept DriveWith handwheel, With pneumatic actuator
  • Casing materialX1NICRMOCU25-20-5, X2CRNIMO18-14-3, NIMO16CR16TI, NICR21MO14W
  • Nominal pressurePN 16
  • Max. nominal sizeDN 100
  • Min. nominal sizeDN 6
  • Max. allowed fluid temperature160 °C
  • Min. allowed fluid temperature-20 °C