Main applications

  • Boiler feed systems
  • Building services
  • Fire fighting and sprinkler systems
  • Groundwaterlevel (mining/buildings)
  • Irrigation
  • Lake, Damwater extraction
  • Passenger ships and ferries
  • Pressure boosting, fire fighting systems
  • Rainwater utilization
  • Sea -& Riverwater Extraction
  • Swimming pools
  • Systems
  • Water
  • Water Extraction
  • Water supply
  • Water transport
  • Water works
  • Watertransport
  • Well

Technical data

T max 90 °C
DN max 200
PN max 16


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 KTW recommendations (use of elastomers in drinking water applications); shut-off and sealing to atmosphere by completely enclosed diaphragm; position indicator with integrated stem protection. All moving parts are separated from the fluid by the diaphragm. Maintenance-free.


SISTO-16TWA (drinking water up to 90 °C): drinking water, particularly drinking water installations to DIN 1988, water containing chlorine, seawater, etc. SISTO-16HWA (hot water up to 140 °C): all service water qualities. SISTO-16 DLU (compressed air up to 90 °C): compressed air with oil content, oils and technical gases

Further technical information about SISTO-16TWA

Overview of technical data

T -10 – 90 (°C)
DN 15 – 200
PN 16
Actuator options available ex works Electric actuator type MAT-E, Pneumatic actuator type MAT-P/PC
Body design Straight pattern body
Bonnet design Bonnet
Coating Yes
No dead volume" design Yes
Dimension standard EN 558-1/1
Handwheel movememt Rising
Lining No
Valve disc/plug material Soft seat
Threaded-end design Flange design
Body material (EN standard) 1.4409
Main applications Industry and process engineering, Water, Building services
Body material Cast iron
Body/bonnet seal element Supported and enclosed diaphragm