a complete range of plate valve assemblies and internal components for air and process gas compressors, as well as refrigeration, marine and locomotive brake applications. Windston's product line includes slotted valve plates, damper plates, spring plates, and helical or leaf springs. Valve assemblies are manufactured to any specification, including damped and undamped designs, as well as combination valves. Windston's products can be 100% interchangeable with valves supplied by the custom - engineered for any application.