Designed especially for the protection of piping and shut-off valves where there is a possibility of trapping liquid LP-Gas or anhydrous ammonia. They may be installed in pipelines and hoses located between shut-off valves or in the side boss of RegO shut-off valves.


SKU Product Name Valve Body Material Container Connection (in.) Wrench Hex Section Accessories Protective Cap Accessories-Pipeaway Adapter Or Threads Start To Discharge Setting (PSIG)
SS8021U** External Hydrostatic Relief Valves Stainless Steel 1/4" M. NPT 11/16” 8001-55 1/4" NPSM Thrds 450 PSIG
SS8021P** External Hydrostatic Relief Valves Stainless Steel 1/4" M. NPT 11/16” 8001-55 1/4" NPSM Thrds 300 PSIG
SS8021N** External Hydrostatic Relief Valves Stainless Steel 1/4" M. NPT 11/16” 8001-55 1/4" NPSM Thrds 265
SS8021L** External Hydrostatic Relief Valves Stainless Steel 1/4" M. NPT 11/16” 8001-55 1/4" NPSM Thrds 400 PSIG
SS8021K** External Hydrostatic Relief Valves Stainless Steel 1/4" M. NPT 11/16” 8001-55 1/4" NPSM Thrds 375 PSIG
SS8021K External Hydrostatic Relief Valves Stainless Steel 11/16” 8001-55 ¼” NPSM Thrds 375
SS8021J** External Hydrostatic Relief Valves Stainless Steel 1/4" M. NPT 11/16” 8001-55 1/4" NPSM Thrds 350 PSIG
SS8021H** External Hydrostatic Relief Valves Stainless Steel 1/4" M. NPT 11/16” 8001-55 1/4" NPSM Thrds 275 PSIG
SS8021G** External Hydrostatic Relief Valves Stainless Steel 1/4" M. NPT 11/16” 8001-55 1/4" NPSM Thrds 250