All of the current coal conversion and utilization processes require valves for throttling fluids containing solid particles and other harsh contaminants derived from coal at either high temperature or high pressure, or both. Experience to date in pilot-size facilities has clearly demonstrated that valves, in general, have not been reliable in this service. Failures can be categorized as: loss of sealing capability; erosion/corrosion of valve bodies and trim; breakage of valve trim causing loss of control; or packing of solids into passages and cavities causing loss of motion, thus loss of control. The techniques now being used for keeping pilot plants operating are not practical for large-scale demonstration and/or commercial plants. Valves used in coal conversion and utilization processes fall into three types: throttling, blocking, and specialty valves. Throttling-type valves control the flow rate of the media passing through by continuous movement of the valve trim. Blocking valves are basically on-off (i.e., either fully opened or fully closed) valves and must seal in the off (or closed) position. Specialty valves include pressure relief, check (i.e., one-way flow), and other specialty applications. Morgantown Energy Technology Center (METC) has been designated the lead center for the development and testing of components required for coal conversion and utilization applications. METC has been active in the development and testing of valves, coal extruders, gas cleanup systems and other related equipment. Based on information collected, the conclusion was reached that METC should initiate a development, testing, and evaluation program for Valves for Solids Throttling Applications in Coal Conversion and Utilization Applications. The rationale for this program is summarized. (LTN)