68 Graphite Rupture Disks Graphite Rupture Disks Mono Type Safety Relief Valve Protection Options Disk Size MNFA Thickness* (Flange Group 1) NPS DN Actual ID Full Bore Vacuum Support Style ASME Cl 150 PN6 / 10 / 16 / 20 JIS 5K / 10K / 16K Ring Bar Cross Plate Standard Disk Insulated Unit in mm mm in mm in2 mm2 in2 mm2 in2 mm2 in2 mm2 in2 mm2 in mm in mm ½ 13 15 0.62 15.7 0.30 193 N/A N/A N/A N/A N/A N/A N/A N/A 0.625 16 - - ¾ 19 20 0.82 20.8 0.53 341 N/A N/A N/A N/A N/A N/A N/A N/A 0.625 16 - - 1 25 25 1 25.4 0.78 503 0.44 283 0.60 387 0.47 303 0.32 206 0.875 22.3 2.125 54 1-½ 38 40 1.50 38.1 1.76 1,135 N/A N/A 1.34 864 1.05 677 0.72 464 0.875 22.3 2.125 54 2 50 50 2 50.8 3.14 2,025 N/A N/A 2.39 1,541 1.86 1,200 1.30 838 0.875 22.3 2.125 54 2-½ 64 65 2.50 63.5 4.78 3,083 N/A N/A 3.65 2,354 2.94 1,896 2.04 1,316 0.875 22.3 2.125 54 3 76 80 3 76.2 7.06 4,554 N/A N/A 5.56 3,587 4.31 2,780 2.95 1,903 0.875 22.3 2.125 54 4 102 100 4 101.6 12.56 8,103 N/A N/A 10.56 6,812 8.81 5,683 5.47 3,529 0.875 22.3 2.125 54 5 127 125 5 127.0 19.63 12,664 N/A N/A 15.88 10,245 12.70 8,193 8.39 5,412 0.875 22.3 2.125 54 6 152 150 6 152.4 28.27 18,238 N/A N/A 22.27 14,367 17.27 11,141 12.05 7,774 0.875 22.3 2.125 54 8 203 200 8 203.2 50.02 32,270 N/A N/A 40.26 25,974 31.82 20,528 21.14 13,638 1.125 28.6 2.625 66.7 10 254 250 10 254.0 78.53 50,664 N/A N/A 63.53 40,987 50.78 32,761 32.66 21,070 1.5 38.1 3.375 85.7 12 305 300 12 304.8 113.09 72,961 N/A N/A 89.09 57,477 69.09 44,574 47.24 30,477 2 50.8 4.375 111.2 14 356 350 13.25 336.5 137.88 88,954 N/A N/A 108.06 69,715 83.31 53,748 58.07 37,464 2.25 57.2 4.875 123.8 16 406 400 15.25 387.3 182.65 117,838 N/A N/A 144.52 93,238 112.65 72,677 84.49 54,509 2.5 63.5 5.375 136.6 18 457 450 17.25 438.1 233.70 150,773 N/A N/A 181.95 117,386 153.70 99,161 104.31 67,296 2.75 69.8 5.875 149.3 20 508 500 19.25 488.9 291.03 187,760 N/A N/A 233.28 150,502 184.53 119,051 122.49 79,025 3 76.2 6.375 162 24 610 600 23.25 590.5 424.55 273,902 N/A N/A 354.80 228,902 294.05 189,709 190.61 122,973 3 76.2 6.375 162 Notes: *Standard disk thickness does not include gaskets. Insulated unit thickness includes all gaskets • Disks w/pressure ratings of 25 psig (1.72 barg) and above will support full vacuum w/o additional support • Maximum pressure rating of ASME B16.5 Class 150 flanges is 290 psig (19.99 barg) @ 100°F (38°C). The maximum pressure rating is lower at higher temperatures. Reference ASME/ANSI B16.5 • All pressures shown are based on an ambient temperature of 72°F (22°C) • Not all minimum/maximum pressure and temperature combinations are available. Please contact ZOOK for more information • Unless otherwise noted, stated MNFA and Kr values apply to the rupture disk only and does not include the addition of external vacuum supports or insulated units Features • The best choice for low and intermediate burst ratings • Available in nominal sizes 1/2” (15 mm) thru 24” (600 mm) diameters • Designed to fit industry standard flanges ASME B16.5, ISO and JIS • Burst ratings 0.25 psig (0.02 barg) to 150 psig (10.34 barg) • 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 +700°F (–179°C to +371°C). Maximum temperature rating without insulation is 430°F (221°C) or 700°F (371°C) with insulation. 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 • Counterbore side of the disk contacts the process media • Vacuum supports are available for ratings below 25 psig (1.72 barg) • May be configured to withstand high back pressure generated in closed piping systems • Many standard Mono disks in common sizes and pressure ratings are available for RAPID Delivery. Contact ZOOK for more information Sizes in (mm): 1” (25), 1-1/2” (40), 2” (50), 3” (80), 4” (100), 6” (150), 8” (200) to fit ASME B16.5 Class 150 flanges Burst Pressures psig (barg): 10 (0.69), 15 (1.03), 20 (1.38), 25 (1.72), 30 (2.07), 40 (2.76), 50 (3.45), 75 (5.17), 100 (6.89), 125 (8.62), 150 (10.34) Note: RAPID Delivery Mono disks are supplied with adhesive tags • ASME (UD) and PED (CE) compliance available Features Specifications
