McCannalok™ - Bray Series 4X

High Performance Butterfly Valve.
Zero-Leakage Valves with API 607 Certification for High-Pressure and High-Temperature Applications.

High-Performance Double Offset Butterfly Valves for Extreme Service Conditions
Reliable Zero-Leakage Butterfly Valves for High Pressure and Temperature Applications
The Bray McCannalok™ High-Performance Butterfly Valve is engineered for critical industrial applications requiring zero leakage, high pressure, and high temperature performance. Featuring Bray’s patented double offset disc and stem design, the McCannalok™ valve minimizes torque, reduces seat wear, and extends service life beyond 100,000 cycles under extreme pressure.

Proven in independent and internal testing, the McCannalok™ valve delivers bi-directional zero-leakage sealing in severe media such as steam, hydrogen, sour gas (NACE), corrosive chemicals, seawater, and high-temperature gases. With a firesafe API 607 design option and available resilient or metal-seated configurations, the McCannalok™ valve ensures dependable shutoff in refineries, chemical plants, power generation, water treatment, and critical process industries worldwide.

Available in wafer, lug, and double-flanged body styles, with automation-ready compatibility for Bray pneumatic and electric actuators, the McCannalok™ combines precision engineering, rugged reliability, and simplified field maintenance—making it the trusted solution for global industries seeking safety, efficiency, and long-term performance.