The McCannalok™ high performance butterfly valve (also known as a double offset butterfly valve) features an innovative design that offers rugged reliability and extremely easy maintenance in the field. Independent and internal tests prove the
Series McCannalok valve's superior service life capability, with zero leakage shutoff.
The McCannalok™ valve’s unique, patented design received Chemical Processing’s Vaaler
Award for Best Product shortly after it was introduced. The simple, innovative design offers rugged reliability and extremely easy maintenance in the field.
Independent and internal tests have proven superior service life capability with zero leakage shutoff
through over 100,000 cycles. Series 40 Bray/McCannalok™ valves can be automated inexpensively with any of Bray’s pneumatic and electric actuators. The McCannalok™ high performance valve delivers the highest quality and highest value available for
your requirements. After a test of over 100,000 cycles at 720 psi (49.6 Bar), the seat remained in excellent condition, continuing to provide a bi-directional zero leakage seal. Even after more than 878,000 cycles at 2 psi (0.1 Bar), the McCannalok™ high
performance valve still sealed zero leakage in both directions.
High Pressure, High Temperature, Zero Leakage Butterfly Valves
Designed for High-Pressure, High-Temperature, and Critical Service Industrial Needs
More Details
Features & Benefits
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A. Stem Design
High-strength, one-piece stem design is standardized for interchangeability of Bray actuators.
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B. Blowout-Proof Stem
The stem retention design does not rely on actuation components to prevent stem blowout.
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C. Adjustable Stem Packing
Easy access allows simple quarter-turn field adjustments without actuator removal.
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D. Stem Seal System
PTFE packing rings with carbon fiber anti-extrusion ring provides constant compression for a positive seal around the stem. Options are available for high temperature, high cycle and firesafe applications.
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E. Stem Bearings
Top and bottom bearings securely support the stem, provide excellent corrosion resistance, and minimize deflection from high temperatures and mechanical loading forces.
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F. Disc
The disc is engineered to maximize flow and minimize resistance for optimal flow rates.
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G. Internal Over-travel Stop
Designed to minimize possible seat damage — extending the service life of the seat.
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H. Bidirectional Resilient Seat
Provides bidirectional zero-leakage sealing while isolating the energizer from line media.
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I. Full-faced Seat Retainer
Cap screws located outside sealing area are protected from corrosion while allowing simple seat replacement.
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J. Body
Extended neck allows access to stem packing adjustments and actuator mounting when valve is fully insulated.
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K. Dead-end Service
Lug and double-flanged bodies are full rated for bidirectional dead-end service.
Series 40/41/4A
Up to 285 psi (19.6 bar)
Valve Sizes (NPS)
| Model | Body Style | Resilient Seated | Firesafe | Metal Seated |
|---|---|---|---|---|
| 40 | Wafer | 2 to 66 | 2 to 48 | 2½ to 36 |
| 41 | Lug | 2 to 66 | 2 to 48 | 2½ to 36 |
| 4A | Double Flanged | 2 to 54 | 2 to 48 | 2½ to 36 |
Valve Sizes (DN)
| Model | Body Style | Resilient Seated | Firesafe | Metal Seated |
|---|---|---|---|---|
| 40 | Wafer | 50 to 1500 | 50 to 1200 | 65 to 900 |
| 41 | Lug | 50 to 1500 | 50 to 1200 | 65 to 900 |
| 4A | Double Flanged | 50 to 1400 | 50 to 1200 | 65 to 900 |
Series 42/43/4B
Up to 740 psi (51 bar)
Valve Sizes (NPS)
| Model | Body Style | Resilient Seated | Firesafe | Metal Seated |
|---|---|---|---|---|
| 42 | Wafer | 2 to 36 | 2 to 36 | 2½ to 30 |
| 43 | Lug | 2 to 54 | 2 to 36 | 2½ to 30 |
| 4B | Double Flanged | 3 to 42 | 2 to 36 | 2½ to 30 |
Valve Sizes (DN)
| Model | Body Style | Resilient Seated | Firesafe | Metal Seated |
|---|---|---|---|---|
| 42 | Wafer | 50 to 900 | 50 to 900 | 65 to 750 |
| 43 | Lug | 50 to 1400 | 50 to 900 | 65 to 750 |
| 4B | Double Flanged | 80 to 900 | 50 to 900 | 65 to 750 |
Series 44/45
Up to 1440 psi (100 bar)
Valve Sizes (NPS)
| Model | Body Style | Resilient Seated | Firesafe | Metal Seated |
|---|---|---|---|---|
| 44 | Wafer | 3 to 24 | 3 to 24 | 3 to 12 |
| 45 | Lug | 3 to 36 | 3 to 36 | 4 to 12 |
Valve Sizes (DN)
| Model | Body Style | Resilient Seated | Firesafe | Metal Seated |
|---|---|---|---|---|
| 44 | Wafer | 80 to 600 | 80 to 600 | 80 to 300 |
| 45 | Lug | 80 to 900 | 80 to 900 | 100 to 300 |
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