Product Overview
High-quality butterfly valve for handling demanding cryogenic media
Reliable Cryogenic Valve for Liquid Oxygen and Natural Gas Applications
Raising Performance Standards
McCannalok™ cryogenic high-performance butterfly valve provides industry-leading cryogenic sealing technology and performance, manufactured to the highest quality standards. This valve is designed to handle the most challenging media in today’s industrial environments, including liquid oxygen, liquid natural gas, and other cryogenic liquids.
Cryogenic Testing
Bray operates world-class cryogenic testing facilities in the United States, China, and India, dedicated to R&D validation and custom customer testing. Our Raymond Technology Center in Houston is operated by trained and experienced cryogenic valve specialists, offering various services through:
Safe testing of large valves via cryogenic logging
6,000-gallon liquid nitrogen tank
Mass spectrometer
Precision cleaning
Bray operates three precision cleaning facilities worldwide to meet customer oxygen cleaning requirements.
Technical Specifications
| Item | Parameters |
|---|---|
| Size Range | NPS 3 to 24 / DN 80 to 600 |
| Body Material | 316 Stainless Steel |
| Temperature Range | -320°F to +250°F (-196°C to +121°C) |
| Stem Material | XM-19 |
| Maximum Allowable Working Pressure | ASME Class 150, 300 EN 1092 PN 10, 16, 25, 40 |
| Seat Material | Polar® Seat |
| Shut-Off Rating | Zero Leakage (Ambient Temperature) BS 6364 (Cryogenic) ISO 28921 (Cryogenic) |
| Disc Material | 316 Stainless Steel |
| Body Type | Wafer, Lug |
| Flange Drilling | ASME B16.5, EN 1092 |
| Certifications | ABS, ATEX, Bureau Veritas, CCS, DNV, PED, PE(S)R |
| Face-to-Face Length | ASME B16.10, API 609, EN 558, ISO 5752 |
| Applications | Aerospace, Air Separation, Beverage Processing, Ethylene, Food Processing, Gas Liquefaction, Liquid Nitrogen, Liquid Oxygen, LNG Liquefaction, LNG Receiving Terminals, LNG Processing, Oil & Gas, Refrigeration, Steel Production |
Features and Benefits
A Stem Design
Standardized high-strength, one-piece stem design for interchangeability with Bray actuators.
B Blowout-Proof Stem
Stem locking design independent of actuator components to prevent stem ejection. Designed for safe operation under cryogenic conditions.
C Adjustable Stem Packing
Easy field quarter-turn adjustment without removing the actuator.
D Stem Packing System
PTFE packing rings compressed by the packing gland create a positive seal around the stem. Certified compatibility with liquid and gaseous oxygen facilities (third-party tested).
E Stem Bearings
Top and bottom bearings securely support the stem, providing excellent corrosion resistance and minimizing deflection from mechanical loads.
F Bolted Cover End
This connection prevents internal stress during valve cool-down. Extended neck protects stem packing from extreme temperatures and facilitates easy packing adjustment and actuator mounting.
G Full-Face Seat Retainer
Socket head screws located outside the flange gasket sealing area improve flange gasket sealing and facilitate easy seat replacement.
H Polar Seat
Jacket and energizer maintain consistent sealing performance during process thermal cycling and extend valve life by reducing seat wear. Provides sealing performance at cryogenic temperatures down to -320°F (-196°C).
I Built-In Travel Stop
Minimizes seat damage and extends seat service life.
J Disc
Disc design maximizes flow and reduces resistance for optimal Cv / Kv values.