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.
Series 30/31
Size Range
NPS 2 to 20 / DN 50 to 500
NPS 14 to 20 / DN 350 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)
150 psi (10 Bar)
Specifications
Resilient Seated Butterfly Valve - Series 30/31
Size Range
NPS 2 to 20 / DN 50 to 500
NPS 14 to 20 / DN 350 to 500
NPS 14 to 20 / DN 350 to 500
Body Materials
Cast Iron, Ductile Iron, Carbon Steel, Aluminum
Temperature Range
-20°F to 400°F (-29°C to 204°C)
Stem Materials
Stainless Steel, Monel K500
Maximum Allowable Operating Pressure
175 psi (12 Bar)
150 psi (10 Bar)
150 psi (10 Bar)
Seat Materials
BUNA-N, EPDM, FKM, Polyurethane
Shutoff Rating
Bidirectional Bubble-tight
Disc Materials
Nylon 11 Coated Ductile Iron, Aluminum Bronze, Stainless Steel, Hastelloy®, Halar® Coated Ductile Iron
Body Style
Wafer, Lug
Design Standard
MSS SP-67, API 609, Category A
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
Certifications
ABS, ATEX, Bureau Veritas, CRN, DNV, FDA 21 CFR 177.1550, NSF 61/372, PED, PE(S)R
Face to Face
MSS SP-67, API 609, Category A, EN 558
Applications
Potable Water, Wastewater, Seawater, HVAC
Features & Benefits
