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Series 3A/3AH Resilient Seated Butterfly Valve
Brand: Bray International, IncBray's Series 3A/3AH resilient seated butterfly valve features a double flanged design that is well-suited for dead-end service. International compatibility is a major design advantage of Bray's modular valve product lines.
The same valve is compatible with most world flange standards – ASME Class 125/150, BS 10 Tables D and E, BS 4504 NP 10/16, AS 2129 and JIS10.
Additionally, Series 3A and 3AH valves are designed to comply with ISO 5752-Table 2 (EN558 Table 13) face-to-face and ISO 5211 actuator mounting flanges resulting in one valve design that can be used in a variety of world markets.
Features- Stem Retaining Assembly
- The stem is retained in the body by means of a unique Stainless Steel Spirolox® retaining ring, a thrust washer and two C-rings, manufactured from brass as standard, stainless steel upon request. The retaining ring may be easily removed with a standard hand tool. The stem retaining assembly prevents unintentional removal of the stem during field service
- Stem
- Precision double "D" disc to stem connection drives the disc without the need of screws or pins
- Stem Seal
- Double "U" cup seal design is self-adjusting and gives positive sealing in both directions and prevents external substances from entering the stem bore
- Disc
- Spherically machined and hand polished to provide a bubble-tight shutoff, minimum torque, and longer seat life
- Extended Neck
- Extended neck length allows for 2" (50 mm) of piping insulation and is easily accessible for mounting actuators
- Primary & Secondary Seals
- These seals prevent line media from coming in contact with the stem or body. Primary Seal is achieved by an interference fit of the molded seat flat with the disc hub. Secondary Seal is created because the stem diameter is greater than the diameter of the seat stem hole
- Seat
- Bray's tongue and groove seat design lowers torque and provides complete isolation of flowing media from the body. The seat also features a molded O-ring which eliminates the use of flange gaskets
- Stem Bushing
- Non-corrosive, heavy duty acetal bushing absorbs actuator side thrusts
Specifications
Brand
Size Range
- 2” - 20” (DN 50 - 500)
Temperature Range
- -20° F to 400° F (-29° C to 204° C)
Maximum Allowable Operating Pressure
- Series 3A: 175 psi (12 bar)
- Series 3AH: 250 psi (16 bar)
Shutoff Rating
- Bidirectional Bubble-tight
Body Style
- Double Flanged
Flange Drilling
- ASME B16.1 Class 125, ASME B16.5 Class 150, EN 1092 PN 10, PN 16
Certifications
- ABS, Bureau Veritas, China Classification Society (CCS), DNV, SIL
Face-to-Face
- API 609 Category B short patern, EN 558 Series 13
Testing Standard
- MSS SP-61, API 598, EN 12266-1
Disc Materials
- Nylon 11 Coated Ductile Iron, Aluminum Bronze, Stainless Steel
Seat Materials
- Bonded EPDM, Bonded BUNA-N, Bonded FKM
Stem Materials
- Stainless Steel, Monel K500
Body Materials
- Cast Iron, Ductile Iron, Carbon Steel
- Wastewater
- Seawater
- Water, Other Liquids and Gases