Double Block and Bleed Ball Valves

6DB Series: 3/8" to 15,000 psi (1034 bar)


Parker Autoclave Engineers high pressure double block and bleed valve is capable of operating to15,000 psi (1034 bar) and is available in 3/8" size. Standard ball valves are furnished in 316 SS with specials materials available.


  • One piece, trunnion mounted stem design.

  • Full port flow path minimizes pressure drop.

  • Carbon filled PEEK seats for excellent chemical, heat and wear resistance.

  • Vee stem vent valve.

  • Manufactured from cold worked stainless steel.

  • Viton O-rings for operation from 0°F (-17.8°C ) to 400°F (204°C).

  • Optional O-rings available for high-temperature service.

  • Optional wetted materials available.

  • Quarter turn from open to close with positive stop.


Parker Autoclave's high pressure Double Block & Bleed Ball Valves are designed using our revolutionary one-piece Ball and Stem that is trunnion-mounted eliminating the possibility of "stem-turnout" common with other valves designed for similar service. The valve is designed with one body housing three valves, eliminating many fitting leak points while reducing the weight of the total system as compared to traditionally plumbed instrumentation.

Double Block and Bleed Ball Valves