A. Structure of accordion covering: (1)plus material: nylon cloth or protective cloth (2)support: pvc sheet (3)connecting plate: resin plate, iron plate B. Resistence: endure high temperatures, oil and cooling fluid The highest temperture: 4000 ' c The speed can up to 200m/min C. Mounting: it can be mounted in either way, intemally or externally or vertically or horizontally. D. Design parameters for accordion covering: Standard