The GEMU 415 pneumatically operated 2/2 way butterfly valve has a low maintenance plastic piston actuator and is available with “normally closed” and “double acting” control functions.

  • Suitable for inert and corrosive liquid and gaseous media
  • Insensitive to viscous media
  • Various seal materials available to suit the working medium
  • Low weight
  • Optional accessories
    • GEMU 1225 electrical position indicator with 2 potentialfree, adjustable limit switches (additional module, can be retrofitted)
    • Stroke limiter
    • Optical position indicator


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Type 415
Nominal Size 15 mm20 mm25 mm32 mm40 mm50 mm
Body Configuration Straight through
Connection Butt Weld Spigots to ASME BPE Threaded Sockets DIN ISO 228
Valve Body Material Brass (Butterfly disc brass), MS St. steel investment casting (Butterfly disc st. steel), 1.4581
Seal Material EPDM FPM PSI, Silicone rubber
Control Function Double acting Normally closed Normally open
Actuator Size
Actuator Ø 50 Actuator Ø 70

Working Medium

Working Medium Inert, corrosive, liquid, viscous and gaseous media which have no negative impact on the physical and chemical properties of the body, disc and seal materials.
Max. Perm. Pressure of Working Medium 10 bar
Max. Perm. Temperature of Working Medium 100 ºC
Max. Ambient Temperature 60 ºC

Control Medium

Control Medium Inert Gases
Max. Control Pressure 6 bar
Max. Perm. Temperature of Control Medium 60 ºC
Filling Volume 0.05 NI (for Actuator Ø 50) 0.2 NI (for Actuator Ø 70)