Bulk products dispenser

rotary

ATEX-certified rotary valves (also known as rotary dispensers) are applied as feeding dispensers for bulk products and airflow-reduction gates in dust extraction systems, central vacuum cleaning systems, pneumatic handling systems, and in similar applications. If certified for compliance with ATEX 95, the rotary valves are approved for use in Ex-zones and as standalone explosion isolation systems. Depending whether a rotary valve has an ATEX certificate or not and what the ATEX certification scope is, it can belong to one of three types which follow: Standard rotary valves which are strictly prohibited from use in Ex-zones or as explosion isolation systems; ATEX-certified rotary valves approved for Ex-zones, which are not a hazard of explosive atmosphere ignition if properly rated for the application. This type of rotary valves are strictly prohibited from use as explosion isolation systems; ATEX-certified rotary valves approved for operation in Ex-zones and as standalone explosion isolation systems (the rotary valve version is resistant to pressure and/or flame penetration). The two latter of the three types are often confused with one another when choosing a rotary valve for a specific application. For example, RFQs and technical specifications often state that rotary valves must be ATEX-certified for a specific Ex-zone, e.g. Zone 20 for the protected equipment interior and Zone 22 for the protected equipment exterior.