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Series 3A/3AH

Resilient Seated Butterfly Valve


Size Range

NPS 2 to 20 / DN 50 to 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

Body Materials

Cast Iron, Ductile Iron, Carbon Steel

Stem Materials

Stainless Steel, Monel K500

Seat Materials

Bonded EPDM, Bonded BUNA-N, Bonded FKM

Disc Materials

Nylon 11 Coated Ductile Iron, Aluminum Bronze, Stainless Steel

Flange Drilling

ASME B16.1 Class 125, ASME B16.5 Class 150, EN 1092 PN 10, 16


ABS, ATEX, Bureau Veritas, China Classification Society (CCS), DNV, PED, PE(S)R, SIL


Wastewater, Seawater, Water, other liquids and gases

Features & Benefits

Bray’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.