Bray Series-30,31 Resilient Seated Butterfly Valve

Manufacturer: Bray

The series 30/31 resilient seated butterfly valve's high strength through-stem design allows easy disassembly and reduced disc to stem failure.

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Features Applications Model Document

The stem is retained in the body by means of a unique Stainless Steel Spirolox® retaining ring, a thrust washer and two C-rings, manufactured from brass as standard, stainless steel upon request.
Non-corrosive, heavy duty acetal bushing absorbs actuator side thrust.
Double "U" cup seal design is self-adjusting and gives positive sealing in both directions.
Extended neck length allows for 2" of piping insulation and is easily accessible for mounting actuators.
Casting is spherically machined and hand polished to provide a bubble-tight shut off, minimum torque, and longer seat life.
One-piece wafer or lug style. Polyester coating for excellent corrosion resistance. Nylon 11 coating is available as an option. 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.
Precision double "D" disc to stem connection drives the disc without the need for screws or pins.
Bray's tongue and groove seat design lowers torque and provides complete isolation of flowing media from the body. The seat also features a molded O-ring which eliminates the use of flange gaskets.

Potable Water, Wastewater, Seawater, HVAC

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