The Bray Tri Lok® valve is a high-performance triple offset butterfly valve designed for extreme service applications. Its cam-like triple offset geometry eliminates rubbing between seat and seal ring, reducing wear and extending service life, while the torque-seated metal-to-metal seal ensures reliable bi-directional zero leakage shutoff.
Unique Features: splined disc/stem connection prevents misalignment, supports axial movement, and maintains seal integrity.
Performance: handles temperatures from -320°F to 842°F (-196°C to 450°C) with ASME Class 150–900 pressure ratings.
Applications: bulk liquid storage, LNG, power generation, refining, chemical processing, cryogenic service, pulp & paper, shipbuilding, geothermal steam, and water & wastewater.
Materials: available in carbon steel, stainless steel, and high alloys including Inconel®, Hastelloy®, and XM-19.
With its compact, weight-saving design, Tri Lok offers an efficient alternative to larger valve types, delivering safety, reliability, and long-term performance for critical industries worldwide.
Non-Rubbing Triple Offset Design Extends Cycle Life and Enhances Safety
Bray Tri Lok®: Proven Isolation Valves for High-Pressure and High-Temperature Service
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Features & Benefits
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A. Field-Replaceable Seat & Seal System
The fully field-replaceable seat & seal extends overall life, minimizes downtime, and reduces the need for costly off-site repairs or total replacement.
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B. Enhanced Seat Hardness
Eliminates risk of seat/seal galling, offering superior performance, durability, and abrasion resistance compared to other materials.
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C. Metal-to-Metal Sealing
Tri Lok’s non-rubbing, metal-to-metal sealing system is inherently firesafe and fire-tested, while meeting zero-leakage requirements for many critical applications.
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D. Seal Ring
Offers a flexible design and wide range of materials to provide torque-loaded sealing with zero-leakage. (Optional solid seal ring available.)
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E. Splined Disc-to-Stem Connection
The strong and reliable connection allows for axial movement of the stem independent of the disc, to protect the disc/stem connection from temperature fluctuations and pressure effects. This connection prevents typical misalignment problems of rigidly attached discs and stems, minimizes hysteresis, eliminates external connections & associated hardware, and allows for easy assembly & disassembly.
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F. Adjustable Stem Packing
Fully-adjustable, field-replaceable stem seal system is certified to international fugitive emission standards.
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G. Robust Blowout-Proof Stem
One-piece stem features blowout prevention ring located outside of the pressure boundary, as well as redundant blowout prevention mechanisms fully conforming to API 609 and safety requirements.
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H. Indexed Stem
Provides positive visual indication of disc/seal ring position after installation.
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I. Elongated Stem Bearings
Hardened bearings provide maximum stem support.
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J. Increased Body Wall Thickness
In accordance with API 600, provides greater corrosion allowance.
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K. SIL 3 Capable
The Tri Lok valve is SIL 3 capable, while also offered as one of Bray’s many automated packages that meet various SIL requirements.
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Bray's state-of-the-art cleanroom facilities deliver ISO Class 6 to ISO Class 9 precision cleaning around the globe where valves are cleaned, inspected, bagged & tagged to meet the most stringent global standards, ensuring contamination-free valves.
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