This dual cylinder valve was designed especially for industrial uses. It increases the cylinder’s flexibility by permitting DOT cylinders up to 100 lbs. propane capacity to be used interchangeably or simultaneously for either liquid or vapor withdrawal.


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)
3129U External Hydrostatic Relief Valves Brass 1/2" M. NPT 1 1/8" 3129-40P 3129-10* 450 PSIG
3129P External Hydrostatic Relief Valves Brass 1/2" M. NPT 1 1/8" 3129-40P 3129-10* 300 PSIG
3129L External Hydrostatic Relief Valves Brass 1/2" M. NPT 1 1/8" 3129-40P 3129-10* 400 PSIG
3129K External “Pop-Action” Supplementary Pressure Relief Valves for Small ASME Containers and DOT Cylinders Brass 1/2" M. NPT 1 1/8” 3129-40P 3129-10* 375 PSIG
3129J External Hydrostatic Relief Valves Brass 1/2" M. NPT 1 1/8" 3129-40P 3129-10* 350 PSIG
3129H External Hydrostatic Relief Valves Brass 1/2" M. NPT 1 1/8" 3129-40P 3129-10* 275 PSIG
3129G External “Pop-Action” Supplementary Pressure Relief Valves for Small ASME Containers and DOT Cylinders Brass 1/2" M. NPT 1 1/8” 3129-40P 3129-10* 250 PSIG