78 Graphite Rupture Disks Graphite Rupture Disks RT2 / RT2T Type Features • The RT2 disk is suitable for gas, liquid or vapour service • Available in nominal sizes from 1” (25 mm) thru 12” (300 mm) • Fits into a reusable disk holder • The ZOOK RT2 type Graphite bursting disk is equivalent to most other manufacturers replacement element type graphite disks, i.e. EHG2, G2, Series 2, E2, and in most cases will fit into their holders (Consult ZOOK first) • The RT2 disk can handle an operating pressure of up to 90% of the minimum rated burst pressure of the disk • Standard burst tolerances are +/- 10% for 5 psig (0.34 barg) and above, and +/- 0.75 psig (0.05 barg) for below 5 psig (0.34 barg) • The RT2 disk can withstand full vacuum if rated at 25 psig (1.72 barg) and above. For disks rated below 25 psig (1.72 barg), a reverse pressure support (RPS) must be fitted into the disk holder. (Note: The RPS is a fixed type vacuum support and will reduce the free flow area of the disk on burst) • For additional corrosion resistance and wider temperature range special fluoropolymer sintered RT2T disk is available. (Minimum pressure may vary) • Burst detection available for most applications by fitting RDI detector in place of holder outlet side gasket • The RT2 disks will be manufactured, where applicable, in accordance to the latest pressure equipment directive (PED) 2014/68/EU (Category IV) and EN-ISO-4126-2 and are CE Marked. Burst test certificates will be supplied with the disks (Third party witness testing is also available if required) • Standard holder materials available: Graphite, Stainless Steel and FS (fluoropolymer coated stainless steel) Specifications Specifications Notes: *Assembly heights exclude flange gaskets p Max pressure based on max design Pressure/Temperature of companion flanging selected g Contact ZOOK • 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 Disk Size Assembly Heights* MNFA Outside NPS DN Actual ID Metal Holder Graphite Holder Graphite & Metal Holder w/o Vacuum Support Metal Holder w/ Vacuum Support Graphite Holder w/ Vacuum Support ASME B16.5 Class DIN & ISO ISO ONLY 150 PN6 PN10 PN16 PN20 in mm mm in mm in mm in mm in2 mm2 in2 mm2 in2 mm2 in mm in mm in mm in mm in mm 1 25 25 1 25.4 0.84 21.3 1.16 29.4 0.76 490 0.46 297 0.46 299 2.50 63.5 2.52 64.0 2.80 71.1 2.80 71.1 2.50 63.5 1-½ 38 40 1.5 38.1 0.96 24.3 1.26 32.0 1.94 1,251 1.08 693 1.10 712 3.25 82.5 3.39 86.1 3.62 91.9 3.62 91.9 3.25 82.5 2 50 50 2 50.8 1.03 26.1 1.33 33.7 3.04 1,961 2.15 1,385 1.88 1,218 4.00 101.6 3.78 96.0 4.21 106.9 4.21 106.9 4.00 101.6 2-½ 64 65 2.5 63.5 1.26 32.0 1.50 38.1 5.13 3,309 2.81 1,816 2.97 1,920 4.75 120.6 4.59 116.5 5.00 127.0 5.00 127.0 4.75 120.6 3 76 80 3 76.2 1.33 33.7 1.68 42.6 7.79 5,025 4.28 2,759 3.74 2,415 5.25 133.3 5.20 132.0 5.59 141.9 5.59 141.9 5.25 133.3 4 102 100 4 101.6 1.47 37.3 1.92 48.7 12.17 7,851 8.17 5,272 7.80 5,037 6.75 171.4 5.98 151.8 6.38 162.0 6.38 162.0 6.75 171.4 6 152 150 6 152.4 1.63 41.4 2.53 64.2 27.39 17,670 17.11 11,036 17.64 11,385 8.63 219.2 8.15 207.0 8.58 217.9 8.58 217.9 8.63 219.2 8 203 200 8 203.2 2.02 51.3 3.35 85.0 48.69 31,412 26.75 17,259 27.6 17,806 10.88 276.3 10.31 261.8 10.75 273.0 10.75 273.0 10.88 276.3 10 254 250 10 254.0 2.27 57.6 4.23 107.4 76.08 49,083 51.84 33,442 38.33 24,730 13.25 336.5 12.48 316.9 12.91 327.9 12.91 327.9 13.25 336.5 12 305 300 12 304.8 2.72 69.0 5.07 128.7 109.56 70,683 58.91 38,007 60.80 39,225 16.00 406.4 14.69 373.1 14.88 377.9 14.88 377.9 16.00 406.4
