The GEMU 550 pneumatically operated 2/2 way angle seat globe valve has a low maintenance piston actuator and PTFE seat providing reliable operation.
The valve spindle is sealed by a self-adjusting gland packing providing low maintenance and reliable valve spindle sealing even after a long service life. The wiper ring fitted in front of the gland packing protects the seal against contamination and damage.

  • Suitable for inert and corrosive liquid and gaseous media
  • Substantially reduced installation dimensions when using the body with male threads which can be installed using union nuts
  • Materials of all medium wetted parts can be selected to suit relevant applications
  • Higher media temperatures/with bellows on request
  • Stainless steel actuator for simple cleanability, corrosive atmospheres
  • Various types of valve body connections
  • Good flow capability
  • Extensive range of accessories
  • Low weight
  • The valve is easy to clean
  • Standard packing suitable for vacuum


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Type 550
Nominal Size 10 mm15 mm20 mm25 mm32 mm40 mm50 mm6 mm65 mm8 mm80 mm
Body Configuration 2/2-way body
Connection Butt Weld Spigots ASME BPE Butt Weld Spigots DIN Butt Weld Spigots EN ISO 1127 Clamps ASME BPE for pipe ASME BPE, length EN 558-1, series 1 Threaded Sockets DIN ISO 228 Threaded Sockets NPT
Valve Body Material 1.4408 Cast stainless steel 1.4435 (316 L) Forged body 1.4435 (ASTM A 351 CF3M) Investment casting (Material equivalency 316L) ASTM A 351 CF3M Investment casting (Material equivalency 316L)
Seat Seal PTFE
Control Function Double acting Normally closed Normally open
Actuator Size
Actuator 0 piston Ø28 mm Actuator 1 piston Ø42 mm Actuator 2 piston Ø60 mm Actuator 2 piston Ø60 mm Actuator 3 piston Ø80 mm Actuator 3 piston Ø80 mm Actuator 4 piston Ø100 mm Actuator 5 piston Ø130 mm
Flow Direction Over the plug Under the plug
Spring Set Standard
Special Versions1
Special venting (Specially for the food industry) Surfaces electropolished Vibration ground finish - as standard
Max. Ambient Temperature 60 ºC

Working Medium

Working Medium Corrosive, inert, gaseous and liquid media which have no negative impact on the physical and chemical properties of the body and seal material.
Max. Perm. Temperature of Working Medium 180 ºC
Max. Permissible Viscosity 600 mm²/s

Control Medium

Control Medium Inert Gases
Max. Perm. Temperature of Control Medium 80 ºC
Filling Volume Actuator size 0: 0.006 NI Actuator size 1: 0.025 NI Actuator size 2: 0.084 Nl Actuator size 3: 0.245 NI Actuator size 4: 0.437 NI Actuator size 5: 0.798 NI
  • 1 Special venting can only be supplied ex works.