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SISTO-16TWA Diaphragm valve
Diaphragm valve


Diaphragm valve to DIN/EN with flanged ends, for drinking water installations to DIN 1988, DIN-DVGW-approved for water acc. to test W 270, in compliance with the latest German Environment Agency guideline; shut-off and sealing to atmosphere by completely enclosed and spiral-supported SISTOMaXX diaphragm; 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

  • Pressure boosting
  • Fire-fighting systems
  • Domestic water supply
  • Air-conditioning systems
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Technical Data

  • Nominal pressurePN 16
  • Max. nominal sizeDN 200
  • Max. allowed fluid temperature90 °C

Material number list – SISTO-16TWA

12 products
NameNominal pressureNominal size InletWeightMaterial numberPrice
SISTO-16TWA 1.4409-SISTOMaXX DN10026.1 KilogramM232A059
upon request
SISTO-16TWA 1.4409-SISTOMaXX DN12544 KilogramM232A060
upon request
SISTO-16TWA 1.4409-SISTOMaXX DN151.9 KilogramM232A051
upon request
SISTO-16TWA 1.4409-SISTOMaXX DN15082 KilogramM232A061
upon request
SISTO-16TWA 1.4409-SISTOMaXX DN202.6 KilogramM232A052
upon request


  • 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.
  • Increased functional reliability of the diaphragm thanks to balanced diaphragm suspension
  • Maintenance-free as all moving parts are separated from the fluid by the diaphragm.


  • S43A_20384585099-1_1

Technical Data

  • FunctionShut off/control flow
  • Connection typeFlange
  • Design concept DriveWith handwheel
  • Casing materialEN-GJL-250, GX2CRNIMO19-11-2
  • Nominal pressurePN 16
  • Max. nominal sizeDN 200
  • Min. nominal sizeDN 15
  • Max. allowed fluid temperature90 °C
  • Min. allowed fluid temperature-10 °C


TitleFormatSizeLast change
ISO 45001 certificate (8630.8559_EN)PDF0.137/7/2021
ISO 14001 certificate (8630.8558_EN)PDF0.157/7/2021
ISO 9001 certificate (8630.8560_EN)PDF0.157/7/2021
TitleFormatSizeLast change
Declaration of conformity (8630.8507_EN)PDF0.158/5/2021
TitleFormatSizeLast change
Operating Manual (0570.821_EN)PDF3.437/17/2021
TitleFormatSizeLast change
Type series booklet SISTO-16TWA (8635.33_EN)PDF0.654/19/2021

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