Product Features

SISTO-C tank bottom valves allow complete draining. They are typically welded onto the tank bottom at its lowest point. SISTO offers various design options for welding the valve into the tank.

Variants for welding onto the tank wall, e.g. for sample taking, are also available.

  • As Y-pattern design
  • With flush connection
  • As multiport-valve


Usability up to 20 bar / 290 psi and our unique sealing system with a spiral support are only some advantages of the SISTO diaphragm valves.



Type series booklets, operating instructions, declarations of conformity and other documents can be found in the download area.