S30Pneumatic Wafer Butterfly Valve

S30Electric Wafer Butterfly Valve

Bray Series 30 Wafer and Series 31 Lug Type Lined Butterfly Valves feature a one-piece body construction with a high-strength through-stem design and internal disc-to-stem connection.
The Series 30/31 provides bidirectional bubble-tight shutoff and isolation between the pipeline media and the stem or body.
Our Series 30/31 butterfly valves are easily automated for on/off or modulating service and are available with a variety of high-quality elastomer seat and disc materials for various applications. 

National BRAY Wafer Butterfly Valve

Bray S30/31 series valves feature a high-strength one-piece stem design, driving the disc through a precisely machined flat connection between the disc and stem. This design offers a high Cv value, easy disassembly without damaging the disc or stem, and the stem is secured in the body with a patented retaining ring. These valves offer many unique advantages: long service life, safety and reliability, easy maintenance, and parts that are interchangeable with other Bray components.

Size Range: 2 inch - 20 inch (DN50mm - 500mm)

Body Structure: S30 Wafer S31 Lug

Temperature Range: -29 to 204 degrees Celsius

Pressure Rating: Bidirectional bubble-tight shutoff up to 175psi (12bar)

Body (CWP) 250psi (17.2bar)

Body Materials: Gray iron, ductile iron, carbon steel, aluminum

Disc Materials: Nylon 11 coated ductile iron, aluminum bronze, stainless steel, Hastelloy, Halar coated ductile iron

Stem Materials: Stainless steel, Monel K500

Seat Materials: NBR EPDM FKM PTFE