The GEMU 677 HPW 2/2 way diaphragm valve has a low maintenance bonnet with an economically designed handwheel and an integral optical position indicator. All medium wetted parts are made of PFA (body) and PTFE (diaphragm).

  • Suitable for inert and corrosive liquid and gaseous media, particularly high purity media
  • All medium wetted parts and the housing are made of high quality plastic materials
    • Valve body: PFA-lnliner/PVDF-Outliner (carbon-filled)
    • Diaphragm material: PTFE/EPDM
  • Bonnet: PP glass fiber reinforced
  • Assembled, tested and packaged under class 100 cleanroom conditions
  • Good Kv / Cv value
  • Minimal deadleg
  • Optional flow direction, will seal in either flow direction up to full working pressure
  • Due to its design (diaphragm valve, i.e. soft flow deviation) also particularly suitable for polishing agents and slurries
  • Optional mounting position
  • Optional accessories
    • Electrical position indicator
    • Locking device


Type 677 HPW
Nominal Size 2" pipe DN 50
Body Configuration Straight through
Connection Imperial butt weld spigots
Valve Body Material PFA-lnliner/PVDF-Outliner (carbon filled)
Diaphragm Material PTFE/EPDM
Control Function Manually Operated Manually operated (lockable)
Options Mounting thread for position indicator
High Purity Design High Purity
Ambient Temperature Max. 60 ºCMax. 140 ºF

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 diaphragm material.
Working Temperature1 Max. 90 ºCMax. 194 ºF
  • 1 Higher temperatures upon request depending on working pressure.