High Performance Butterfly Valve

McCannalok Cryogenic

Size Range
NPS 3 to 24 / DN 80 to 600
Temperature Range
-320°F to +250°F (-196°C to +121°C)
Maximum Allowable Operating Pressure
ASME Class 150, 300
EN 1092 PN 10, 16, 25, 40


High Performance Butterfly Valve - McCannalok Cryogenic

Size Range
NPS 3 to 24 / DN 80 to 600
Body Materials
316 Stainless Steel
Temperature Range
-320°F to +250°F (-196°C to +121°C)
Stem Materials
Maximum Allowable Operating Pressure
ASME Class 150, 300
EN 1092 PN 10, 16, 25, 40
Seat Materials
Polar® Seat
Shutoff Rating
Zero Leakage (at ambient temperatures)
BS 6364 (at cryogenic temperatures)
ISO 28921 (at cryogenic temperatures)
Disc Materials
316 Stainless Steel
Body Style
Wafer, Lug
Flange Drilling
ASME B16.5, EN 1092
ABS, ATEX, Bureau Veritas, CCS, DNV, PED, PE(S)R
Face to Face
ASME B16.10, API 609, EN 558, ISO 5752
Aerospace, Air Separation, Beverage Processing, Ethylene, Food Processing, Gas to Liquids, Liquid Nitrogen, Liquid Oxygen, LNG Liquefaction, LNG Receiving Terminals, LPG Handling, Petroleum, Refrigeration, Steel Production

Features & Benefits

Raising the Performance Bar

The McCannalok Cryogenic high performance butterfly valve provides industry leading cryogenic sealing technology and performance while being produced to the highest quality standards. The valve is designed to handle the most difficult medias in today’s industrial environments — liquid oxygen, liquid natural gas, and other cryogenic liquids.


McCannalok Cryogenic Features

  • The advanced Polar® Seat provides strength, flexibility, and unparalleled performance at cryogenic temperatures.
  • Industry leading leakage performance, with high cycle capability, at cryogenic temperatures.
  • Material compatibility with liquid and gaseous oxygen, certified by third party testing laboratory.
  • One-piece, high-strength, low temperature impact resistant stem.
  • Contoured disc to maximize flow.


Cryogenic Testing

Bray operates world class cryogenic testing facilities in the USA, China, and India dedicated for research & development validation and customer specific testing. Run by trained and experienced cryogenic valve specialists, our Raymond Technical Center in Houston utilizes:

  • Cryogenic test pit for safe testing of large valves.
  • 6,000 gallon liquid nitrogen tank.
  • Mass spectrometers.


Precision Cleaning

Bray operates three precision cleaning facilities around the world to meet customer's oxygen cleaning needs.


  • A. Stem Design

    High-strength, one-piece stem design is standardized for interchangeability of Bray actuators.

  • B. Blowout-proof Stem

    The stem retention design does not rely on actuation components to prevent stem blowout. Designed to provide safe operation for cryogenic conditions.

  • C. Adjustable Stem Packing

    Easy access allows simple quarter-turn field adjustments without actuator removal.

  • D. Stem Seal System

    PTFE packing rings, compresssed by the packing gland, provide a positive seal around the stem. Certified compatibility with liquid and gaseous oxygen service (tested by third party).

  • E. Stem Bearings

    Top and bottom bearings securely support the stem, provide excellent corrosion resistance, and minimize deflection from mechanical loading forces.

  • F. Bolted Bonnet

    Connection prevents internal stress during valve cool-down. Extended neck protects stem packing from extreme temperatures, and allows access for stem packing adjustments and actuator mounting.

  • G. Full-faced Seat Retainer

    Utilizes cap screws located outside the flange gasket sealing area — improving flange gasket sealing and allowing simple seat replacement.

  • H. Polar Seat

    Jacket and energizer maintain consistent sealing performance during process thermal cycling and extend valve cycle life by reducing seat wear. Provides sealing at temperatures as low as -320°F (-196°C).

  • I. Internal Travel Stop

    Minimizes possible seat damage and extends the service life of the seat.

  • J. Disc

    The disc is engineered to maximize flow and minimize resistance, for optimal Cv / Kv values.

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