Aerodyne offers the Vacu-Valve® for reliable discharge of powders from drying chambers and cyclone dust collectors. These trickle valve systems require no power supply, controls, or lubrication. Anhydro Inc., a global manufacturer of spray drying equipment, has been utilizing the Vacu-Valve for over 30 years. Stewart Gibson, Anhydro’s process engineer, claims that the Vacu-Valve’s simplicity is one of the main reasons why they switched to and continue to use this trickle valve system, as opposed to a rotary airlock system. Gibson says, “The Vacu-Valve is a simple powder release valve that prevents ingress of air into the system, which is just what we needed.” The Vacu-Valve is a fraction of the cost of the rotary valve it typically replaces. Gibson also says he continues to use the Vacu-Valve because of the “reduced maintenance and high reliability” it offers; claiming that with no moving parts or controls, it just works.