Specifications SIZE RANGE 25mm to 300mm (1" to 12") BURST PRESSURE RANGE 0.07 bar g to 20 bar g (1 psig to 290 psig) TEMPERATURE RANGE -80 to 170C (-110 to 340F) MAXIMUM OPERATING RATIO 85% of minimum burst pressure(76.5% of nominal burst pressure) FRAGMENTATION ON BURST fragmenting RELIEF VALVE ISOLATION no VACUUM SERVICE support not required above 1.7 bar g (24.6 psig) FLUID COMPATIBILITY liquid, gas or vapour KR VALUES not available TORQUE-SENSITIVE yes CYCLE LIFE average MATERIAL RANGE graphite REVERSAL RATIO Not applicable DAMAGE RATIO <1 (fail-safe) LEAK TIGHTNESS average PERFORMANCE TOLERANCE +/- 10% (zero manufacturing design range) PROTECTIVE LININGS Available on both faces Pressure and Solutions Intelligence To find out how our products could benefit you and your organisation, or for specifications outside those stated on this data sheet please contact Elfab directly or via your local representative. Specifications and Performance BURST PRESSURE RANGE in barg (psig) at 20 °C (68 °F) Nominal Bore Graphite (mm) (inch) Min Max 25 1 0.70 (10) 20.0 (290) 40 1 ½ 0.48 (7.0) 15.0 (217) 50 2 0.28 (4.1) 11.0 (159) 65 2 ½ 0.21 (3.0) 10.0 (145) 80 3 0.21 (3.0) 9.0 (130) 100 4 0.14 (2.0) 6.9 (100) 150 6 0.10 (1.5) 5.2 (75) 200 8 0.07 (1.0) 2.8 (41) 250 10 0.07 (1.0) 2.4 (35) 300 12 0.07 (1.0) 2.1 (30) PERFORMANCE TOLERANCE (ZERO MANUFACTURING DESIGN RANGE) Nominal Bore +/- 10% Toleranceon Burst pressure +/- 25% Toleranceon Burst pressure 25mm (1) Above 1.7barg (24.7psig) Up to 1.7barg (24.7psig) 40mm (1½) Above 1.0barg (14.5psig) Up to 1.0barg (14.5psig) 50mm (2) Above 0.7barg (10.0psig) Up to 0.7barg (10.0psig) 65mm (2½) and Above Above 0.34barg (5.0psig) Up to 0.34barg (5.09psig) *additional fluoropolymer lining to one face add +5% STANDARD TEMPERATURE RANGE °C (°F) Material Minimum Maximum Resin Impregnated Graphite -80 (-112) 170 (338) FREE FLOW AREA / MINIMUM NET FLOW AREA (MNFA) Nominal Bore With Vacuum Dial Without Vacuum Dial mm inch mm2 in2 mm2 in2 25 1 269 0.42 507 0.79 40 1 ½ 665 1.03 1140 1.77 50 2 1348 2.09 2027 3.14 65 2 ½ 2149 3.33 3167 4.91 80 3 2925 4.53 4561 7.07 100 4 4911 7.61 8108 12.57 150 6 10780 16.71 18244 28.28 200 8 17295 26.81 32433 50.27 250 10 29943 46.41 50677 78.55 300 12 43118 66.83 72975 113.1 HOLDER DIMENSIONS Graphite Stainless Steel Nominal Bore (B) Height (C) Height (C) Outside Diameter (A) mm inch mm inch mm inch BS EN 1092 ANSI 25 1 27 1.06 22 0.87 PN 6 to 25 150 to 300lb 40 1 ½ 31 1.22 25 0.98 PN 6 to 25 150 to 300lb 50 2 32 1.26 26 1.02 PN 6 to 25 150 to 300lb 65 2 ½ 37 1.46 30 1.18 PN 6 to 25 150 to 300lb 80 3 43 1.69 35 1.38 PN 6 to 25 150 to 300lb 100 4 47 1.85 37 1.46 PN 6 to 25 150 to 300lb 150 6 56 2.20 44 1.73 PN 6 to 25 150 to 300lb 200 8 64 2.52 50 1.97 PN 6 to 10 150 lb 250 10 68 2.68 53 2.09 PN 6 to 10 150 lb 300 12 76 2.99 61 2.40 PN 6 to 10 150 lb Temperature shields are designed for use in graphite disc applications where gas operating temperatures can reach 600°C. The shield consists of a stainless steel carrier with a ceramic fibre insulating flock and is installed directly upstream of the bursting disc. To ensure the correct performance of a bursting disc, it must be used in its correct holder, as specified by the bursting disc manufacturer.

Pressure Intelligence The data shown on these sheets represents the standard offering from Elfab. Depending upon the requirements of your application, Elfab maybe able to provide a solution based on this product but outside the standard operating parameters. In addition, Elfab produces an extensive range of alternative products which maybe more suitable for your requirements. As a result of extensive testing, Elfab can advise on these choices, or on other technical matters, such as discharge requirements, temperature testing, material selection and corrosion resistance, customised designs and burst detection. To discuss your specific product or service requirements please contact your Elfab representative.

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