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Series 30/31

Resilient Seated Butterfly Valve

Specifications

Size Range

NPS 2 to 20 / DN 50 to 500
NPS 14 to 20 / DN 350 to 500

Temperature Range

-20°F to 400°F (-29°C to 204°C)

Maximum Allowable Operating Pressure

175 psi (12 Bar)
150 psi (10 Bar)

Shutoff Rating

Bidirectional Bubble-tight

Body Style

Wafer, Lug

Body Materials

Cast Iron, Ductile Iron, Carbon Steel, Aluminum

Stem Materials

Stainless Steel, Monel K500

Seat Materials

BUNA-N, EPDM, FKM, Polyurethane

Disc Materials

Nylon 11 Coated Ductile Iron, Aluminum Bronze, Stainless Steel, Hastelloy®, Halar® Coated Ductile Iron

Flange Drilling

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

Certifications

ABS, ATEX, Bureau Veritas, CRN, DNV, FDA 21 CFR 177.1550, NSF 61/372, PED, PE(S)R

Applications

Potable Water, Wastewater, Seawater, HVAC

Features & Benefits

The Bray Series 30 Wafer and Series 31 Lug style resilient seated butterfly valves feature a one-piece body with a high-strength through stem design utilizing an internal disc to stem connection.

The Series 30/31 is engineered to provide bidirectional bubble-tight shutoff and isolation of the line media from the stem or valve body.
Available with a wide selection of high-quality resilient seat & disc materials for a variety of applications, our Series 30/31 butterfly valves are easily automated for on-off or modulating service.