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 re-usable 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 +/- ¾ psig (0.05 barg) for below 5 psig (0.34 barg) • For additional corrosion resistance and wider temperature range special fluoropolymer sintered RT2T disk is available. (Minimum pressure may vary) vacuum support and will reduce the free flow area of the disk on burst) • 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) • 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 Specifications Specifications Disk Size NPS DN Actual ID Assembly Heights* Metal Holder 1-½ 2 2-½ 3 4 6 8 10 12 Notes: *Assembly heights exclude flange gaskets p Max pressure based on max design Pressure/Temperature of companion flanging selected • 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 25 38 50 64 76 25 40 50 65 80 1 1.5 2 102 152 203 254 305 100 150 200 250 300 2.5 3 4 6 8 10 12 25.4 38.1 50.8 63.5 76.2 101.6 152.4 203.2 254.0 304.8 0.84 0.96 1.03 1.26 1.33 1.47 1.63 2.02 2.27 2.72 21.3 24.3 26.1 32.0 33.7 37.3 41.4 51.3 57.6 69.0 Graphite Holder 1.16 1.26 1.33 1.50 1.68 1.92 2.53 3.35 4.23 5.07 29.4 32.0 33.7 38.1 42.6 48.7 64.2 85.0 Graphite & Metal Holder w/o Vacuum Support in mm mm in mm in mm in mm in2 1 0.76 1.94 3.04 5.13 7.79 107.4 128.7 12.17 27.39 48.69 76.08 109.56 mm2 490 1,251 1,961 3,309 5,025 7,851 17,670 31,412 49,083 70,683 MNFA Metal Holder w/ Vacuum Support in2 0.46 1.08 2.15 2.81 4.28 8.17 17.11 26.75 51.84 58.91 mm2 297 693 1,385 1,816 2,759 5,272 11,036 17,259 33,442 38,007 Graphite Holder w/ Vacuum Support in2 0.46 1.10 1.88 2.97 3.74 7.80 17.64 27.6 38.33 60.80 mm2 299 712 1,218 1,920 2,415 5,037 11,385 17,806 24,730 39,225 ASME B16.5 Class 150 in 2.50 3.25 4.00 4.75 5.25 6.75 8.63 10.88 13.25 16.00 mm 63.5 82.5 101.6 120.6 133.3 171.4 219.2 276.3 336.5 406.4 in 2.52 3.39 3.78 4.59 5.20 5.98 8.15 10.31 12.48 14.69 PN6 mm 64.0 86.1 96.0 116.5 132.0 151.8 207.0 261.8 316.9 373.1 78 Graphite Rupture Disks
