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Type 188

Pneumatically Operated Valve DN 8 - 20 mm (3/8" - 3/4")
Efficient plastic piston actuator


  • Control air connection 90° to flow direction for side by side or other installations saving space
  • Compact design, the outside diameter of the actuator is the same size as the bonnet flange
  • Actuator high resistance to heat transfer
  • Smooth exterior design ideal for wash downs
  • Control air connection 90° to flow direction
  • Encapsulated diaphragm
  • Optical indicator
  • CDSA sealing concept


  • Eliminated water hammer
  • Depending on the diaphragm material, for all neutral and aggressive, gaseous and liquid media
  • The flow can be in either direction
  • Hermetic sealing
  • Cavity free body
  • Without any corrosion


  • Available with a wide range of control equipment and accessories, also for retrofitting
  • Available on request higher temperature versions