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Series 30/31
Resilient Seated Butterfly Valve
Specifications
Size Range | NPS 2 to 20 / DN 50 to 500 |
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Temperature Range | -20°F to 400°F (-29°C to 204°C) |
Maximum Allowable Operating Pressure | 175 psi (12 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.