Bray's Series 22/23 lined butterfly valve features a state-of-the-art design that provides excellent shutoff protection (bubble-tight shutoff) and high Cv values with exceptionally long service life. The Series 22/23 resilient seated butterfly valve is available in a variety of materials including PTFE, PFA, Stainless Steel, UHMWPE and special alloys to fit a wide range of customer requirements.
PTFE Lined Butterfly Valve
Series 22/23
Size Range
NPS 2 to 24 / DN 50 to 600
Temperature Range
0°F to 392°F (-18°C to 200°C)
Maximum Allowable Operating Pressure
150 psi (10 Bar)
Specifications
PTFE Lined Butterfly Valve - Series 22/23
Size Range
NPS 2 to 24 / DN 50 to 600
Body Materials
Ductile Iron, Carbon Steel, Stainless Steel
Temperature Range
0°F to 392°F (-18°C to 200°C)
Stem Materials
17-4 PH Stainless Steel
Maximum Allowable Operating Pressure
150 psi (10 Bar)
Seat Materials
PTFE, Conductive PTFE, UHMWPE
Shutoff Rating
Bidirectional Bubble-tight
Disc Materials
Stainless Steel, PTFE/SS, PFA/SS, UHMWPE/SS, UHMWPE/DI, Hastelloy®, Titanium
Body Style
Wafer, Lug
Flange Drilling
ASME B16.1 Class 125, ASME B16.5 Class 150, EN 1092 PN 10, 16
Testing Standard
MSS SP-61, API 598, EN 12266-1
Seat Energizer Material
Silicone | FKM
Certifications
ABS, ATEX, Bureau Veritas, DNV, PED, PE(S)R, SIL
Face to Face
MSS SP-67, API 609 Category A, EN 558 Series 20
Features & Benefits
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A. Top Stem Bushing
A top stem bushing, retained by a stainless steel ring, is provided to absorb actuator side thrusts and is acetal as standard or PTFE as an option.
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B. Upper Stem Seal
The upper stem seal serves to keep any environmental contaminants from entering the stem bore.
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C. Body
Bodies are two piece wafer or lug style and are polyester coated. All bodies meet full ASME Class 150 pressure ratings for hydrostatic requirements.
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D. Bearings
PTFE impregnated steel bearings provided for precision alignment of the upper and lower stem.
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E. Primary Seal
The primary seal is achieved by an interference fit between the extra wide disc hubs and contoured seat.
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F. Seat Design
The seat design reduces seating/unseating torque and, at the same time, reduces wear on the contacting parts. Curvatures machined into the inner seat area minimize contact forces between the disc and seat as the disc approaches, or opens from, the closed position. This unique seat geometry permits lower torques and reduces seat wear.
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G. Seat Energizer
A resilient seat energizer extends completely around the seat, including the disc hub. This provides uniform force sufficient for bubble-tight shut off.
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H. Neck
An extended neck design in all valve sizes allows for 2" (50 mm) of piping insulation and provides easy access for mounting actuators.
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I. Flange Locating Holes
Locating holes in the wafer version provide quick and precise alignment during valve installation eliminating disc interference with adjacent pipe internal diameter.
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J. Blowout Proof Stem
A shoulder is machined into the upper stem. The stem and the disc are pressed together during assembly to become one part, thus the design is a positive stem-to-disc drive connection.
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K. Disc
The lined disc has 1/8" (3 mm) minimum thickness of pure, virgin PTFE or PFA encapsulated over Stainless Steel.