Material description of main parts of a38y, a43h, a37h duplex spring flange safety valve

The materials of all parts of a38y, a43h and a37h safety valves are the same as those of A47H and a48y spring safety valves except the tee (made of WCB). This valve is applicable to equipment and pipelines with steam, water and other media with working temperature ≤ 350 ℃. As an overpressure protection device, the standard of connecting flange is jb/t79-94 series

Standard for double spring flange safety valve

Design Code: gb/t 12243

Structure length: gb/t 12221

Flange connection: jb/t 79

Test and inspection: gb/t 12242

Product identification: gb/t 12220

Supply specification: jb/t 7928