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<strong>Valve</strong> Configuration Code (Contd.)Pressure ClassDesignation Class05 15006 30010 30012 60014 90016 150018 250020 30021 (-2T Only) 30022 60023 (P-2 Only) 90024 90026 150028 2500Bellows SelectionDesignation Range00 Non Bellows30 Bellows35 Balanced BellowsNon-<strong>Standard</strong> OutletDesignation Type<strong>Standard</strong> OutletRating15Mating OutletFlange20 Full Rated OutletInterchangeability NumberDesignation1 to 4UMSeat DesignDesignationMSDATD<strong>Valve</strong> TypeNumerical valuesvary by Orifi ceUniversal MediaTypeMetal SeatO-RingThermodisc<strong>Standard</strong> <strong>Valve</strong> ConnectionArea (API) Area (ASME)Orificein 2 cm 2 in 2 cm 2D 0.110 0.710 0.128 0.825E 0.196 1.265 0.228 1.470F 0.307 1.981 0.357 2.302G 0.503 3.245 0.585 3.774H 0.785 5.065 0.913 5.888J 1.287 8.303 1.496 9.652K 1.838 11.858 2.138 13.794L 2.853 18.406 3.317 21.400M 3.600 23.226 4.186 27.006N 4.340 28.000 5.047 32.561P 6.380 41.161 7.417 47.852Q 11.050 71.290 12.850 82.903R 16.000 103.226 18.600 120.000T 26.000 167.742 30.210 194.903U N/A N/A 35.000 225.806V N/A N/A 50.260 324.257W N/A N/A 78.996 509.651Temperature RangeDesignationRangecto 450°F (232.2°C)t451°F (232.8°C) & AboveMaterial TrimDesignationTrimCC <strong>Standard</strong> MaterialC1 Ambient Temp. to -50°F [LCC Construction]C2 Ambient Temp. To -50°F [St. St. Construction]S2 Stainless St. [Internals, Except Spring Assy.]S3 Stainless St. [All except Spring Assy.]S4 Stainless St. [Complete <strong>Valve</strong>]M1 Monel [Nozzle & Disc]MB (M1-1/2) Monel [M1+Disc Holder, Adj. Ring & Ring Pin]M2 Monel [Internals, except Spring Assy.]M3 Monel [All except Spring Assy.]M4 Monel [Complete <strong>Valve</strong>]H1 Hastelloy C [Nozzle & Disc]H2 Hastelloy C [Internals, except Spring Assy.]H3 Hastelloy C [All except Spring Assy.]H4 Hastelloy C [Complete <strong>Valve</strong>]L1 Low Temperature Service [-21°F To -75°F]L2 Low Temperature Service [-76°F To -150°F]L3 Low Temperature Service [-151°F To -450°F]T1 High Temperature Service [1001°F To 1200°F]T2 High Temperature Service [1201°F To 1500°F]A1 Alloy 20 [Nozzle & Disc]A2 Alloy 20 [Internals, except Spring Assy.]A3 Alloy 20 [All except Spring Assy.]A4 Alloy 20 [Complete <strong>Valve</strong>]HA Hydrofl uoric Acid [Anhydrous Hf Alky]D1 Duplex [Nozzle & Disc]D2 Duplex [Internals, except Spring Assy.]D3 Duplex [All except Spring Assy., Stud/Nut & Bellows Assy.]D4 Duplex [All except Stud/Nut & Bellows Assy.]<strong>1900</strong> <strong>Series</strong> Safety Relief <strong>Valve</strong> | <strong>1900</strong>.99
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