"Applicable Scope The products are used for controlling the medium to open and close in fuel oil piping, lubricating, water piping and steam piping at temperatures 120℃ or less. Manufactured in accordance to JIS F7400 Flanges as per JIS B2220 Materials of major parts 1 - Body - Cast Iron - FC20 2 - Seat - Bronze - BC6 3 - Disc - Bronze - BC6 4 - Stem - Brass - C3771BD" http://www.qdshd-marine.com/