Product Overview
Lined seat butterfly valve for corrosive media applications
PTFE Lined Butterfly Valve, Corrosion Resistant, Long Service Life
Bray 22/23 series lined butterfly valves feature the most advanced design, providing excellent sealing protection (bubble-tight) along with high Cv values and extended service life. The 22/23 series lined butterfly valves offer a variety of material options including PTFE, PFA, Stainless Steel, UHMWPE, and special alloys to meet diverse customer needs.
Technical Specifications
| Item | Parameter |
|---|---|
| Size Range | NPS 2 to 24 / DN 50 to 600 |
| Body Material | Ductile Iron, Carbon Steel, Stainless Steel |
| Temperature Range | 0°F to 392°F (-18°C to 200°C) |
| Stem Material | 17-4 PH Stainless Steel |
| Maximum Allowable Operating Pressure | 150 psi (10 bar) |
| Seat Material | PTFE, Conductive PTFE, UHMWPE |
| Seat Class | Bidirectional Bubble-tight |
| Disc Material | Stainless Steel, PTFE/SS, PFA/SS, UHMWPE/SS, UHMWPE/DI, Hastelloy®, Titanium |
| Body Type | 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 Rubber | FKM |
| Certification | ABS, ATEX, Bureau Veritas, DNV, PED, PE(S)R, SIL |
| Face-to-Face | MSS SP-67, API 609 Category A, EN 558 20 Series |
Features and Benefits
A Top Stem Bushing
Provides a top stem bushing secured by a stainless steel ring to absorb actuator side thrust, available in standard acetal or PTFE material.
B Upper Stem Packing
Upper stem packing prevents any environmental contaminants from entering the stem bore.
C Body
The body is a two-piece wafer or lug design with polyester coating. All bodies meet the full hydrostatic requirements of ASME Class 150 pressure rating.
D Bearings
PTFE-impregnated steel bearings for precise alignment of upper and lower stems.
E Primary Seal
The primary seal is achieved through interference fit between the widened disc hub and the profiled disc.
F Seat Design
The seat design reduces opening/closing torque while also reducing wear on contacting components. The curved machining of the internal seat area minimizes contact force between the disc and seat as the disc approaches or leaves the closed position. This unique seat geometry supports lower torque and reduces seat wear.
G Seat Energizer
The resilient seat energizer fully surrounds the seat, including the disc hub. The uniform force provided achieves bubble-tight sealing.
H Neck
Extended neck design on all valve sizes allows for 2” (50 mm) pipe insulation and easy actuator installation.
I Flange Locating Holes
Locating holes in the wafer version allow for quick and accurate alignment during valve installation, preventing disc interference with the adjacent pipe inner diameter.
J Blowout-Proof Stem
The shoulder is machined into the upper stem. The stem and disc are pressed together during assembly to become one component, making this a positive drive connection from stem to disc.
K Disc
Lined disc minimum thickness of 1/8” (3 mm), made of solid PTFE or PFA encapsulated stainless steel.