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Construction
The GEMU 554 pneumatically operated 2/2 way angle seat globe valve, which can also be used at relatively high temperatures, has a plastic pneumatic 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.

Features
  • Substantially reduced installation dimensions when using the body with male threads which can be installed using union nuts
  • When using actuated valves in sizes 0 and 1 the gland packing is not subjected to line pressure as the pressure is sealed by the valve seat when closed
  • Materials of all medium wetted parts can be selected to suit relevant applications
  • Control valves with control cone available
Advantages
  • Various types of valve body connections: Threaded sockets, threaded spigots, butt weld spigots
  • Good flow capability
  • Extensive range of accessories
  • Low weight

Specifications

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Type 554
Nominal Size 10 mm15 mm20 mm25 mm32 mm40 mm50 mm65 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 (ASTM A 351 CF3M) Investment casting (Material equivalency 316L) ASTM A 351 CF3M Investment casting (Material equivalency 316L) Rg 5 Cast bronze
Seat Seal PTFE
Control Function Double acting Normally closed Normally open
Actuator Size
Actuator 0 piston Ø 50 mm (Flow under the plug) Actuator 1 piston Ø 70 mm (Flow under the plug) Actuator 2 piston Ø 120 mm (Flow under the plug) Actuator 3 piston Ø 50 mm (Flow over the plug) Actuator 4 piston Ø 70 mm (Flow over the plug)
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 materials.
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 60 ºC
Filling Volume Actuators 0 and 3: 0.05 NI Actuators 1 and 4: 0.125 NI Actuators 2: 0.625 NI