Series 40/41 ASME Class 150 Series 42/43 ASME Class 300 Series 44/45 ASME Class 600 Series 4A/4B ASME Class 150/300 EN 1092 PN 10, 16, 25, 40, 63, 100
Seat Materials
RTFE with Resilient Energizer, PTFE with Resilient Energizer Fire Safe: RTFE and Inconel® with Resilient Energizer
Shutoff Rating
Zero Leakage
Disc Materials
Stainless Steel, Nickel Aluminum Bronze
Body Style
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
API 609
Fugitive Emissions Standard
ISO 15848-1, API 641
applications
High Pressure, High Temperature, Critical Service
Features & Benefits
High Pressure, High Temperature, Zero Leakage Butterfly Valves
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.
A. Stem Design
High-strength, one-piece stem design is standardized for interchangeability of Bray actuators.
B. Blowout-Proof Stem
The stem retention design does not rely on actuation components to prevent
stem blowout.
C. Adjustable Stem Packing:
Easy access allows
simple quarter-turn field adjustments without actuator
removal.
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.
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.
F. Disc
The disc is engineered to maximize flow and minimize resistance for optimal flow rates.
G. Internal Over-travel Stop
Designed to minimize possible seat damage — extending the service life of the seat.
H. Bidirectional Resilient Seat
Provides bidirectional zero-leakage sealing while isolating the energizer from line media.
I. Full-faced Seat Retainer
Cap screws located outside sealing area are protected from corrosion
while allowing simple seat replacement.
J. Body
Extended neck allows access to stem packing adjustments and actuator mounting when valve is fully insulated.
K. Dead-end Service
Lug and double-flanged bodies are full rated for bidirectional dead-end service.
