1,forged valve body 2,weight of single piece between 50kg to 5t 3, ... pressure cylinder Inc., LTD • Shanghai zhenhua heavy industry changxing precision casting co., LTD • Shanghai N - J co., LTD., • Shanghai steam ... center and less than 2 complaint cases . 2, material of steel type of 15#,20#,25#,30#.35#,40#,45#,46 ... 4, accept processing on giving materials. 5, excellent heat treatment. valve body