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

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