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SISTO-20 Diaphragm valve
Diaphragm valve


Diaphragm valve to DIN/EN with flanged ends; shut-off and sealing to atmosphere by completely enclosed spiral-supported diaphragm; body with or without lining, position indicator with integrated stem protection. All moving parts are separated from the fluid by the diaphragm. Maintenance-free.
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Main Applications

  • Chemical industry
  • Homogenisation
  • Industrial recirculation systems
  • Nuclear power stations
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Technical Data

  • Nominal pressure Hydr casingPN 16
  • Maximum nominal size TSGDN 200
  • Max allowed fluid temp TSG160 °C

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  • Reliable sealing to atmosphere and absolutely tight shut-off
  • The diaphragm provides absolutely tight shut-off as well as hermetic sealing to atmosphere and of all operating elements.
  • Maximum service life and pressure limit

Technical Data

  • Component functionShut off/control flow
  • Connection type InletInternal-thread connection, Flange, Butt weld ends, Socket weld ends
  • Design concept DriveWith electric actuator, With handwheel, With pneumatic actuator
  • Mtrl Hydraulic casingEN-GJS-400-18-LT, GX5CRNIMO19-11-2
  • Nominal pressure Hydr casingPN 16
  • Maximum nominal size TSGDN 200
  • Minimum nominal size TSGDN 15
  • Max allowed fluid temp TSG160 °C
  • Min allowed fluid temp TSG-20 °C

Sectional Drawings


TitleFormatSizeLast change
Declaration of conformity (8630.8507_EN)PDF0.152021/8/5
TitleFormatSizeLast change
ATEX-Declaration by the manufacturer (8630.8501_EN)PDF0.562021/4/19
TitleFormatSizeLast change
Operating Manual (0570.821_EN)PDF3.432021/7/17
TitleFormatSizeLast change
Type series booklet SISTO-20 (8643.1_EN)PDF2.482021/8/11
Type series booklet SISTO-20M (8638.12_EN)PDF0.262021/4/19