The rotary valves are constructed in 3 designs, HD HDL and ND. According to customer requirements the rotary valves are provided with a frame, an injector and other appliance (security switch, turningmoitoring).

HD 1200 with frame and injector
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According to thwir design the rotary valves may be used for the following purposes::.
- HD rotary valves are metallically sealing locks for the use within pneumatic high pressure conveyors.
- HDL rotary valves for the use as feeding and discharging locks within the dryer or seperator area.
- ND rotary valves for the air and pressure tight closing underneath cyclones or filters.
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