High Pressure line valve for UHP gases with oleo-pneumatic actuator – D689S
Key advantages
  • Combined soft and metal seat design with low permeation rate.
  • Welded diaphragms provide a high leak tightness integrity
  • Tied diaphragm design which minimizes gas wetted volume to allow easy purging.
  • No moving components in the gas wetted area to not generate particles.
  • Secondary sealing to prevent the gas coming in contact with actuator in the case of diaphragm failure.
  • Threaded weep hole for leak test and pipe away connection (M4 thread), allows the connection to a leak detector.
  • Front and back panel valve fixation
ConnectionsWelded connection according to standards
Working pressure200 bar
Nominal flow rateCV = 0.5
Temperature range-40 to +65 °c
Body materialsSS AISI 316L (standard)
Leak rate1.10-8 m bar L/s
Seat orifice size6 Mm
Markingπ0029 (according to TPED),Valve part number, manufacturing date, nominal pressure and flow direction, Connections - seat material, 3 stars
Dimensional drawings
Downloadable catalogs, brochures
  • Puretec Catalog
    Last update: May 25, 2021
    Available in: en
  • Puretec overview
    Last update: Sep 07, 2021
    Available in: en
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