Diaphragm valve SISTO-16TWA

with handwheelcontrolshut-off

Weir-type diaphragm valve to DIN/EN with flanged ends, straight-way pattern, for drinking water installations to DIN 1988, DIN-DVGW-approved for water acc. to test W 270, in compliance with the latest elastomers guideline of the German Environment Agency; shut-off and sealing to atmosphere by confined and supported SISTOMaXX diaphragm; position indicator with integrated stem protection. All moving parts are separated from the fluid by the diaphragm. Maintenance-free. Applications ■ Drinking water ■ - Service water ■ - Water containing chlorine ■ - Seawater Technical Data Function Shut off/control flow Connection type Flange Design concept Drive With handwheel Casing material EN-GJL-250, GX2CRNIMO19-11-2 Nominal pressure PN 16 Max. nominal size DN 200 Min. nominal size DN 15 Max. allowed fluid temperature 90 °C Min. allowed fluid temperature -10 °C Benefits Reliable sealing ensured by one single sealing element (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. High level of reliability as the thrust bearing minimises the closing torques required. High level of reliability as the valve hydraulics without dead volume. Both the SISTOMaXX diaphragm material and the body material 1.4409 meet the recommendations of the German Environment Agency (Elastomer Guideline) and DVGW Worksheet W270.