Type : Steam
Set Pressure : Steam - 0.5 ~ 15 Kg/Cm2
Spring Options : See Table
Temperature : 220 C
Size : 2 1/2" ~ 6"
Connection : Flange JIS 16K
Body : Ductile Iron
Trims : Stainless Steel
Yoshitake AL-4 is bigger size Safety Valve for Steam. It also has higher pressure setting. Used in the mainline to protect any increase in Pressure.
https://www.yoshitake-inc.com/prod/product?no=166