The MD Series of rotary feeder valves is a material metering valve that immediately contributes tangible operating efficiency advantages, and long-term production and maintenance savings. The MD Series of rotary feeders is constructed with an 8-vane rotary valve that ensures proper pressure sealing at the inlet and outlet flange. The optimal seal produced by an MD Series rotary feeder can reduce compressed air loss by up to 28 CFM/year; a savings of up to $3,600/year based on an industry annual, average cost of $1,200 per 10 CFM of compressed air, according to the manufacturer. The MD Series housings are CNC-machined to precise tolerances; eliminating axial shaft movement, seal leakage, and shortened bearing life. The Valves MD Series rotary feeders are available in cast iron, or cast 304 or 316 stainless steel, in sizes ranging from 4- to 16-inch. Rotor configurations include: closed-end, metering, shallow-pocket, Teflon®-coated, and adjustable-tip. Adjustable rotor tips are available in EPDM, hardened steel, stainless steel, bronze or polyurethane. Interior surface coating options include: hard chrome, tungsten, and Teflon®.