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


  • 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

Material number list – SISTO-16TWA

12 products
NameNominal pressureNominal size InletWeightMaterial numberPrice
S-16TWA 1.4409 SISTOMaXX DN100 PN1626.1 KilogramM232A059
S-16TWA 1.4409 SISTOMaXX DN125 PN1644 KilogramM232A060
S-16TWA 1.4409 SISTOMaXX DN15 PN161.9 KilogramM232A051
S-16TWA 1.4409 SISTOMaXX DN150 PN1682 KilogramM232A061
S-16TWA 1.4409 SISTOMaXX DN20 PN162.6 KilogramM232A052


TitleFormatSizeLast change
icon download-pdfOperating Manual (0570.821_EN)pdf4.056/17/2020

Technical Data

  • FunctionShut off/control flow
  • Connection typeFlange
  • Design concept DriveWith handwheel
  • Casing material1821, 2754
  • Nominal pressurePN 16
  • Max. nominal sizeDN 200
  • Min. nominal sizeDN 15
  • Max. allowed fluid temperature90 °C
  • Min. allowed fluid temperature-10 °C

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