"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 B2220-5k Materials of major parts Body - Cast Steel - ZG230-450 Seat, Dis -Stainless Steel - 2cr13 Steam – Stainless Steel – 2cr13" http://www.qdshd-marine.com/