Bray Series-31U Resilient Seated Butterfly Valve

Manufacturer: Bray

Bray Controls offers our high quality, high pressure resilient-seated butterfly valves to meet the requirements of today's industrial/marine markets. This valve is specifically designed for onshore and offshore fire protection where the applicable certification is D.O.T. 54 (UK Department of Trade). The series 31U is designed to withstand high line velocities and pressure.

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Features Applications Model

All Bray manual gear operators, electric and pneumatic actuators mount directly to the S31U, with no brackets required.
Non-corrosive heavy duty acetal bushing absorbs actuator side thrust.
Patented stem retaining ring and C-rings prevent unintentional removal of the stem during field service.
Bray's bonded tongue and groove resilient seat design offers lower torque than many valves on the market today and provides complete isolation of flowing media from all valve components (excluding the disc) by a totally encasing design. .
Primary Seal is achieved by an interference fit of the molded seat flat with the disc hub. Secondary Seal is created because the stem diameter is greater than the diameter of the seat stem hole.
Extended neck length allows for piping insulation and is easily accessible for mounting operators.
One piece lugged style flange configuration, with a choice of Polyester Coated Ductile Iron/Carbon Steel or uncoated Nickel Aluminum Bronze.
High Strength upper and lower stem incorporate a close tolerance double 'D' disk drive connection.
Casting is spherically machined and hand polished to provide bubble-tight shutoff with minimum torque and an extended seat life.

High Pressure Industrial and Marine Dead-End service, On-Shore and Off-Shore Fire Protection