Sisto diaphragm valve type 16


The Sisto diaphragm valve type 16 has been developed for a wide range of liquids and gases. It has a sealing weir and the unique sealing system "chambered diaphragm with spiral support".

Areas of application

  • Industrial / process technology
  • Power plant technology
  • Ore dressing

Typical media

  • Industrial water
  • Oils
  • Acids
  • Alkalis
  • Technical gases

Customer benefits

  1. Optimized long-term operation
    The spindle protection integrated in the position indicator prevents contamination from the outside.
  2. Reliable operability
    The spindle and all internal operating parts are not in contact with the medium.
  3. Smooth running
    The axial bearing minimizes the closing torques.
  4. Absolute tightness to the outside and in the passage
    The diaphragm seals hermetically to the outside, in the passage and the operating parts.
  5. Cleanliness of the flow medium
    The absence of dead space ensures cleanliness of the medium and prevents deposits.
  6. Fast position control
    Valve position via clear visual indication, easily recognizable even from a distance.
  7. High functional reliability
    Balanced diaphragm suspension increases the functional reliability of the diaphragm.
  8. Maximum service life and pressure operating limit
    The chambered and spiral-supported diaphragm maximizes the service life and pressure operating limit of the diaphragm.
  9. High corrosion resistance
    High quality linings provide safety and durability.

Product data Sisto-16

  • Nominal sizes: DN15-300
  • Pressure class/max. pressure: PN16/16 bar (from DN250 PN10/10 bar)
  • Temperature range: -10°C to +160°C
  • Type: straight through with weir
  • Overall length: EN558 R1 (ISO 5752/1)
  • Body material: cast iron (5.1301)
  • Linings: IIR (butyl), NRH (hard rubber)
  • Coatings: ECTFE (Halar); Polyamide (Rilsan)
  • Diaphragm design: chambered diaphragm with spiral support (from DN250 diaphragm with spiral support)
  • Diaphragm materials: EPDM; CSM; NBR; IIR; FKM; TFM/EPDM 2-part; TFM/PVDF/EPDM 3-part
  • Actuation: manual, pneumatic, electric