... It is a flexible, resilient,homogeneous and compact packing .Used in pumps and valves for various kindsof chemicals (acid, alkali, oil ... petrochemical and foodstuff industries.Pressure: 2Mpa in centrifugal pumps, 10Mpa in piston pumps, 20Mpa in valves.Temperature :<280 centigradeLinear speed: ... 4M/S in centrifugal pumps, 2M/S in piston pumps, 2M/Sin valves.PH range :0~14Spec ...