Cast steel gate valve are designed and manufactured to provide maximum service life and dependability. All gate valves are full ported and meet the design requirements of API STD API600& API6D, BS1414 & BS EN 1984 and generally conform to ASME B16.34. valves are available in a complete range of body/bonnet materials and trim. Materials: Std body/bonnet materials include nine grades of carbon, low alloy and stainless steels. For special applications they can be supplied in other grades of alloy and stainless steel. There+óGé¼Gäós a full range of trim materials to match any service. Optional packing and gasket materials are available for a full range of service conditions. DN50 to DN900, Class 150lbs to 1500lbs