Browse refrigeration valves and driers at F.W. Webb. A refrigeration drier is a crucial component that keeps the system free from water and contaminants; an expansion valve helps to relieve pressure from the system so it can function properly. Find filters, filter driers, service kits, and other high-quality parts for your refrigeration system from Sporlan, Source 1, and other trusted manufacturers. Explore the selection of valves and driers at F.W. Webb for replacement parts to keep a refrigeration system running in top order.