An open-end rotor is available for dust collection and pneumatic conveying applications. It minimizes leakage typically experienced with lighter materials including flour, limestone and other dry bulk materials. They are available with six to 12 vanes, and can be designed to address National Fire Protection Association (NFPA) compliance requirements.
Flex-tip rotors are not NFPA-compliant but are available to address hard-to-move fibrous products including sawdust, plastic pellets, plastic flake and wood pellets. The tips of these rotors bend out of the way to maintain a tight seal as material passes through them.
Helical rotors address other hard-to-move products. They slice through bulk wood chips and wood dust, ensuring jams are prevented.
Radius pocket rotors are available for food-grade and sanitary applications. These rotors feature U-shaped pockets, which are easier to clean and are resistant to compaction of sticky materials.
Scraper rotors are also available for sticky granulated chemicals and food materials. These rotors feature two scraper rotor tips positioned 180° apart and held to closer tolerances than the other blades of the rotor. These tips aid in cleaning the interior housing and endplates reducing cleaning and maintenance time.
Staggered pocket rotors are available for metering applications where a consistent feed rate and a smoother flow of materials is desired. These rotors feature short breaks between points where material flows. Standard sizes feature offset pockets on a staggered rotor. They convey free-flowing materials at a highly controlled rate and are available for smaller valves of 8 in or less.