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Construction
The GEMU 512 pneumatically operated 2/2 way globe valve has a robust low maintenance aluminium piston actuator. 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
  • Suitable for individual applications due to choice of various actuator sizes and valve body materials
  • Customized design option as a control valve
  • Control medium connection can be rotated through 360°
  • Special versions for medium temperatures up to 300°C on request
  • Control valves with control cone available
Advantages
  • Extensive range of accessories such as
    • electrical position indicators
    • electro-pneumatic positioners/process controllers
    • stroke limiter

Specifications

Type 512
Nominal Size 100 mm15 mm20 mm25 mm32 mm40 mm50 mm65 mm80 mm
Body Configuration 2/2-way
Connection
Flanges ANSI class 125/150 RF Flanges EN 1092 / PN 16 / form B Flanges EN 1092 / PN 40 / form B Flanges EN 1092 / PN 16 / form B Flanges ANSI B 16.5, class 300 Flanges ANSI class 125/150 RF Flanges EN 1092 / PN 16 / form B Flanges EN 1092 / PN 40 / form B
Valve Body Material 1.4581 Cast stainless steel EN-GJL-250, GG 25 (Cast iron) GP 240 H, GS-C 25 (Cast steel) EN-GJL-250, GG 25 (Cast iron) GP 240 H, GS-C 25 (Cast steel) EN-GJL-250, GG 25 (Cast iron) GP 240 H, GS-C 25 (Cast steel) GP 240 H, GS-C 25 (Cast steel) 1.4408 Cast stainless steel 1.4581 Cast stainless steel EN-GJL-250, GG 25 (Cast iron) GP 240 H GS-C 25 (Cast steel)
Seat Seal PTFE
Control Function Double acting Normally closed Normally open
Actuator Size
Actuator 1 piston Ø 70 mm (Flow under the plug) Actuator 2 piston Ø 120 mm (Flow under 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 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 0.125 Nl (for Actuator Ø 70) 0.625 Nl (for Actuator Ø 120)

Note

N/A The versions described in this data sheet are those included in our standard range. Further versions for higher pressures and temperatures, other seal systems and other control functions (double acting) on request.