Dual rated to protect against two different pressures in opposite directions
Applications include protection of storage tanks against both excess vacuum and overpressure when single vessel entry is required
Sizes 1-1/2” (38 mm) thru 24” (610 mm) diameters
Designed to fit industry standard flanges ASME B16.5, ISO and JIS
Burst ratings 0.25 psig (0.02 barg) to 1000 psig (68.95 barg) or higher
0% manufacturing range
Operating pressures to 90% of the disk’s marked burst pressure. Contact ZOOK for operating ratio for burst pressures below 40 psig (2.76 barg)
Temperature ratings –290°F to +430°F (–179°C to +221°C). Contact ZOOK for higher temperature ratings. The specified temperature shall be at the disk location at the time when the disk is expected to rupture
Carbon steel armor standard, 316SS optional
Furnished complete with PTFE gaskets attached. Other gasket materials are available
Generally a minimum differential of 10 psi is required between burst ratings. Contact ZOOK for other burst rating combinations
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