Product Overview
API 607 certified zero-leakage valve for high-pressure and high-temperature applications
Reliable Zero-Leakage Butterfly Valve for High-Pressure and High-Temperature Conditions
Bray McCannalok™ high-performance butterfly valve is designed for critical industrial applications requiring zero-leakage, high-pressure, and high-temperature performance. McCannalok™ valves feature Bray’s patented double-offset disc and stem design to minimize torque, reduce seat wear, and extend service life to over 100,000 cycles under extreme pressures.
Proven through independent and internal testing, McCannalok™ valves achieve bidirectional zero-leakage sealing in demanding media such as steam, hydrogen, sour gas (NACE), corrosive chemicals, seawater, and high-temperature gases. McCannalok™ valves feature a fire-safe API 607 design and are available in resilient-seated or metal-seated configurations, ensuring reliable shut-off for refineries, chemical plants, power plants, water treatment facilities, and critical process industries worldwide.
Available in wafer, lug, and double-flanged body styles with automation compatibility for Bray pneumatic and electric actuators, McCannalok™ combines precision engineering, proven reliability, and simplified field maintenance, making it the trusted solution for industries demanding safety, efficiency, and long-term performance.
Technical Specifications
| Item | Parameters |
|---|---|
| Size Range | NPS 2 to 66 / DN 50 to 1500 |
| Body Material | Carbon Steel, Stainless Steel, Nickel Aluminum Bronze |
| Stem Material | Stainless Steel |
| Maximum Allowable Working Pressure | 40/41 ASME Class 150 Series 42/43 ASME Class 300 Series 44/45 ASME Class 600 Series 4A/4B Series ASME Class 150/300 EN 1092 PN 10, 16, 25, 40, 63, 100 |
| Seat Material | RTFE with Elastic Energizer, PTFE with Elastic Energizer Fire-Safe: RTFE and Inconel® with Elastic Energizer |
| Shut-Off Rating | Zero Leakage |
| Disc Material | Stainless Steel, Nickel Aluminum Bronze |
| Body Type | Wafer, Lug, Double Flanged |
| Design Standard | ASME B16.34, ASME VIII, API 609 |
| Flange Drilling | ASME B16.5, EN 1092 |
| Testing Standard | API 598 |
| Certifications | ABS, API 607, ATEX, Bureau Veritas, CCS, DNV, ISO 10497, NSF 61/372, PED, PE(S)R, SIL |
| Face-to-Face Length | API 609 |
| Fugitive Emission Standard | ISO 15848-1, API 641 |
| Temperature Range | -62°F to 500°F (-52°C to 260°C) |
| Applications | High-Pressure, High-Temperature, Critical Applications |
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.
C Adjustable Stem Packing
Easy field quarter-turn adjustment without removing the actuator.
D Stem Packing System
PTFE packing rings with carbon fiber anti-extrusion ring provide continuous compression for reliable sealing around the stem. Multiple combinations available for high-temperature, high-cycle, and fire-safe applications.
E Stem Bearings
Top and bottom bearings securely support the stem, providing excellent corrosion resistance and minimizing deflection from high-temperature and mechanical loads.
F Disc
Disc is engineered to maximize flow and reduce resistance for optimum flow.
G Internal Over-Travel Stop
Designed to minimize potential seat damage and extend seat service life.
H Bidirectional Lined Seat
Provides bidirectional zero-leakage sealing while isolating the energizer from line media.
I Full-Face Seat Retainer
Prevents corrosion of socket head screws located outside the sealing area while facilitating easy seat replacement.
J Body
Extended neck allows stem packing adjustment and actuator mounting when the valve is fully insulated.
K End of Line Service
Lug and double-flanged body styles are suitable for full-rated bidirectional end-of-line service.