Rotary Valves

For dosing, sealing, feeding, discharging as well as measuring of bulk-solids. They are used for a broad range of bulk-solids like ashes, coal, cement, sewage-slurry, plastics, crystalline acids, methyl cellulose, carbon black or any other products in dusty or grainy condition.

Standard Rotary-Valves work on the principle of volumetric-transport. The bulk solids are falling from the Inlet section into the mostly star shaped chambers by force of gravity. While the rotor is turning, a determined volume of the bulk-solid is moved towards the outlet. Based upon the fixed geometry of the rotors chambers, the conveyed volume is well defined.

Our product-range provides various options, designs and materials. We offer a standard-product made from cast-iron, where all parameters which are not related to the housing can be configurated to match your bulk solids characteristics. Over and above we produce Rotary-Valves as a weld-construction, which are available in all customary materials. We provide plenty of options and extra equipment to perfectly serve all of your requirements, which arise from the conditions of your bulk-solid. As a result of our long-term development, we are able to provide standard Rotary-Valves for cement and rough materials  in welded-design in highest quality with short delivery times and at an exceedingly competitive price.

We offer highly specialised Rotary Valves for demanding fields of application as for example high-pressure- and high-temperature. Our self-cleaning-rotary-valves can be heated or cooled, depending on the application. As a process-optimized extra-equipment we offer amongst other various options like overfill-protection and leakage-air collectors.

The installation of a specifically hardened wear brush and sealing strips antagonizes abrasion and premature wear and minimizes  the maintenance effort. It makes perfect sense for many KÖLLEMANN Rotary-Valves to install specifically hardened wear-bush and sealing-strips. This variation of design is especially suitable for fields of application with highly abrasive bulk solids. Certainly in the power plant field it will create an enormous advantage, as the majority of coals do have a significant amount of stones and other abrasive elements.