"Applicable Scope The products are used for controlling the medium to open and close; prevent refluence in fuel oil piping, lubricating oil piping, water piping ,air piping, gas piping and steam piping at temperatures 205℃ or less. Manufactured in accordance to JIS F7400 Flanges as per JIS B2220-16k Materials of major parts 1 - Body - Cast Iron - FC20 2 - Seat - Bronze - BC6 3 - Disc - Bronze - BC6 4 - Stem - Brass - C3771BD"