Pneumatic diaphragm valve DIASTAR Six

The perfect solution when it comes to an economical valve with compact dimensions and a long life cycle. This actuator has been optimised especially for elastomer diaphragms and 6 bar working pressure.  

Fail-safe-to-close (FC mode) 
In the non-operative state, the valve is closed with spring force. When the actuator is pressurised with the control medium (bottom connection), the valve opens. When the control medium escapes, the valve is closed via spring force.

Range: d20DN15 to d63DN50
Connections: unions, sockets, spigots, flanges, IR-spigots
Standards: ISO, ASTM, BS and JIS
Nominal pressure: up to 6 bar
Control medium: compressed air (oil-free)/ inert, non-aggressive gases, max 40 °C 
Max. control pressure: 6 bar for function FC
Accessory: bus-communication with respective pilot valve or valve-cluster

Materials: PVC-U, PVC-C, ABS, PP-H
Seal: EPDM


Fields of Application:

  • tightly-spaced installations
  • water treatment


  • broad range of applications
  • corrosion resistance
  • maximum safety
  • safe maintenance and minimal downtime
  • less inventory and faster retrofitting



PETERSS SIA, Dēļu iela 4, Rīga, LV-1004 Latvija,
Tel. +371 67 605 608, e-mail:
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