Butterfly

Sanitary Butterfly valves are quarter-turn, rotational motion valves that are used to stop, start and regulate flow. They are constructed of 304 or 316 stainless steel with a short, circular body, a round disc with EPDM, Silicone or Viton® seats, top and bottom shaft bearings, and a stuffing box. Sanitary Butterfly valves are available with butt weld and tri-clamp (tri-clover) ends. All wetted surfaces are finished to 32RA or better.

A wafer, or disk, which is approximately the same diameter as the inside diameter of the adjoining tube, rotates on a vertical axis. The valve is fully open when the handle is turned and the disc is rotated a quarter turn, allowing unrestricted flow. When the valve is closed, the handle is turned so the disc completely blocks the passageway. Sanitary Butterfly valves can also be opened incrementally to control flow.

At James Duva, Inc., our Sanitary Butterfly valves are operated with either a pull or trigger handle, but are also available with actuation.

Sanitary Butterfly valves are well-suited for handling large flows of liquid at relatively low pressures, as well as for slurries and liquids with large amounts of suspended solids.

Their weight, space, and cost are clear advantages over other types of valves, and maintenance is relatively easy due to the minimal number of moving parts. They are field serviceable, and repair kits are available if needed.

Sanitary Butterfly valves are manufactured for use in applications that require sterile or hygienic processing and are ideal for use where viscous liquids flow through the process line. Commonly used in dairy, food and beverage, pharmaceutical, medical, and chemical applications, all valve contact surfaces are polished to prevent impurities from settling and corrupting your medium.