ACS Valves' MD Series of rotary feeder valves are material metering valves. The MD Series of rotary feeders is constructed with an 8-vane rotary valve and an outboard bearing design for high-temperature applications up to 750 F. The MD Series rotary feeders are available in cast iron, or cast 304 or 316 stainless steel, in seven valve sizes from 4-inch to 16-inch. Rotor configurations include: closed-end, metering, shallow-pocket, Teflon-coated, and adjustable-tip.