Masoneilan 33000 Series Triple Offset Butterfly Valves

GE’s Masoneilan 33000 Series Triple Offset Butterfly Valve incorporates new performance enhancing operational features, allowing for a more simplified manufacturing process. The result is exclusive patented range of superior performance zero leakage bi-directional triple offset butterfly valves, suitable for extreme pressure/temperature applications.

Product Features

  • Fully Rated: A design focused on circular conical sealing technology means a better seal with max CV, that performs at 100% for longer performance. Many other designs use elliptical seals, which create greater drag, reducing CV and increasing wear.
  • Zero Leakage: Our patented seat and seal technology makes for a more reliable valve. Better by design, there is only one theoretical leak path; properly maintained and operated, a Masoneilan 33000 Series valve means leak-free operation.
  • Less Downtime: When the time comes to carry out essential maintenance, the Masoneilan 33000 Series design pays massive dividends. Components can be quickly inspected, removed and replaced, saving you valuable plant downtime.


  • Flow Direction: Bi-directional (Preferred direction: Shaft upstream, i.e., flow to close; Reverse direction optional, i.e., Shaft downstream or flow to open)
  • Seat Ring Seal Type: Laminated material
  • Seat Leakage: Class IV (Standard) per IEC 60534-4 &ANSI/FCI 70-2; Class V & VI (Optional) per IEC 60534-4 &ANSI/FCI 70-2
  • Cv Ratio: 50/1
  • Inherent Flow Characteristic: Equal percentage
Return to Masoneilan Valve Sales, Service and Distribution