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Saf-tee™ relief devices can be used with HOKE sampling cylinders as an inexpensive safety device or as a pipe size adapter for connecting valves in the make-up of cylinder assemblies.

Two basic models are available to satisfy most pressure ranges. Spring relief models are recommended for applications where re-closure is required.

Rupture Disc models are supplied with a pre-bulged rupture disc which provides excellent resistance to a broad range of hold-down plug and rupture disc to prevent damage due to torque transmission during assembly. A safety screen minimizes fragment release through the plug vents. The maximum operating system pressure should be limited to 80% of the nominal rating of the rupture disc for static operating pressure and ambient temperature. It should be limited to 70% if pressure pulsations occur or used at elevated temperature. The burst tolerance is within the ASME code guidelines.
Safety Relief Devices
Unit of Measure
Items Safety Relief Devices
6712L4YD
Safety Relief Devices
Safety Relief Devices
6712L4YG
Safety Relief Devices
Safety Relief Devices
6712L4YE
Safety Relief Devices
Safety Relief Devices
6712L4YF
Safety Relief Devices
Safety Relief Devices
6712L4YH
Safety Relief Devices
Material N/A 316 Stainless Steel
Replacement Rupture Disc Kit 1 N/A SP6712K1 N/A SP6712K2 N/A SP6712K3 N/A SP6712K4 N/A SP6712K5
Inlet Size N/A 1/4" male NPT
Outlet Size N/A 1/4" female NPT
Operating Pressure N/A 1400 to 1600 psi N/A 1800 to 2000 psi N/A 2600 to 3000 psi N/A 3500 to 4100 psi N/A 5400 to 6200 psi
Operating Temperature Range N/A -20 to +250 ºF-29 to +121 ºC
  • 1 Replacement rupture disc kits include rupture disc, safety screen, slip ring, gasket and instruction sheet.