Valve material Selection Chart MATERIAL （阀门材料选择图表材料）.pdf

Valve material Selection Chart Note… This chart is meant to be used as a guide only and is based on average conditions. Since many factors should be considered, temperature, pressure, per cent of concentration, etc., much care should be taken before a final selection is made. MATERIAL SELECTION GUIDE The following chart was compiled as a guide for the selection of materials to be used in valve construction. This chart is meant to be used as a guide only and is based on average conditions. Since may factors should be considered; I.e, temperature, pressure, per cent of concentration, etc., much care should be taken before a final selection is made. No guarantee of service life is intended This chart was based on a temperature of 70 F. unless otherwise noted. The per cent of concentration was based on 100% unless otherwise noted. When chemicals are mixed it cannot be assumed that the same materials will give the same service conditions as listed on an individual basis. In some instances the same recommendation is given to two or more materials for the same service. Under these conditions the user may have preference based on past experience. The symbols used in the chart are as follows: A - Generally should give satisfactory service with no adverse effects. B - Generally a slight to moderate effect. Use only when nothing better is available. C - Generally a moderate to severe effect. Considered as unsuitable. X - Generally unsuitable under any condition. Blank space indicates sufficient information lacking. TO BE USED ONLY AS A GUIDE NOT A GUARANTEE OF SERVICE. METALS SEATS L E E