A power plant in Ohio was having problems with over pressurization when feeding limestone into a furnace via pneumatic conveying. The plant operators wanted to put a slip stream with the cyclone at the facility to control the stream. The plant manager recently contacted Aerodyne to see if we could offer some assistance. After further information was gathered, it was concluded that the best solution to the plant's issue would be to attach a Vacu-Valve to its current cyclone. This material handling valve requires no power supply, lubrication, or controls. After months of use, the plant operators are happy with the low-maintenance and cost-effective vacu-valves they have in place at the facility.