Refurb - Hull Rotary Disk® Vapor Valve

The Hull Rotary Disk Valve® is designed to combine the advantages of both the poppet and butterfly valves without the disadvantages. It sits between two flanged connections of the chamber and the condenser and is a hybrid improvement on butterfly and poppet type valves. When closed this valve isolates the chamber from the condenser. At a certain point in the lyophilization cycle, this valve opens exposing the lower temperature and pressure in the condenser to the chamber. This allows the process of sublimation to begin.


A Design So Innovative, It Earned a Patent: USP 5,330,157.

Please email to request more information and pricing on this Lyophilizer

Click the image to zoom in

  • HULL Rotary Disk® Vapor Valve

    HULL Rotary Disk® Vapor Valve

Get More Information
  • Static O-Ring face seal eliminates particulate generation
  • Requires much less maintenance time for seal replacement
  • Does not obstruct the vapor path
  • Is more compact; the actuator does not intrude into either lyophilizer vessel
  • Easy installation and maintenance
  • Interchangeable with most major brands of butterfly valves
  • Available in 20", 24", 30" and 36" vapor line sizes and right- or left-hand actuator location
  • Type 316L stainless steel and Polyether ether ketone (PEEK) polymer construction (industry standard), which withstands excessive pressures and steam sterilization
  • Body and Disk O-ring seals are white FDA-approved Silicone
  • Shaft seal is spring-loaded Teflon® cup seal and easily replaced without removing valve body. Average gasket seal replacement time, 15 minutes or less. No rigging or heavy lifting in order to remove valve body. NO EXCESSIVE DOWN TIME!
  • Completely sterilizable - all components are exposed to the cleaning/sterilization process
  • Flange locations holes to meet ANSI 150 lb. standard
  • Wide operation temperature range: -100˚F to +300˚F
  • Pressure rating of 50 psi differential
  • In-place replacement of shaft seal and disk O-Ring without removing valve from vapor line

Use An Isolation Valve Between the Chamber and External Condenser:

  • For vacuum integrity testing: isolate the vessels for individual rate-of-rise determinations
  • For barometric end-point detection during freeze drying (rate-of-rise)
  • For condenser isolation between multiple chamber loads (where condenser ice capacity greatly exceeds product water content)
  • For condenser isolation in case of refrigeration problems (all remaining refrigeration capacity is directed to the product shelves)
  • For reduced turn-around time between batches: unload chamber while defrosting condenser
  • For condenser isolation during steam defrost
  • For cleanroom isolation during condenser maintenance
  • For chamber isolation during inert gas backfill of vials before stoppering
"Not Applicable"