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Type 526Orifice DPressure temperature ratingsUS UnitsValve size 1 D 2 1 D 2 1 D 2 1 D 2 1 1 / 2 D 2 1 1 / 2 D 2 1 1 / 2 D 3Flange rating class Inlet x Outlet 150 x 150 300L x 150 300 x 150 600 x 150 900 x 300 1500 x 300 2500 x 300Actual Orifice diameter d 0 [inch] 0,551 0,551 0,551 0,551 0,551 0,551 0,551Actual Orifice area A 0 [inch 2 ] 0,239 0,239 0,239 0,239 0,239 0,239 0,239Body material: WCB 1.0619Temperature rangePressure range p [psig] S/G/LMaximum -20 to 100 °F 285 740 1480 3705 6000set pressure101 to 450 °F 185 615 1235 3080 5135451 to 800 °F 80Use 1 D 2410 825Use 1 1 /2060 34302 D 2Outlet pressure limit300 x 1501500 x 300285 285 285 600 740Conventional designOutlet pressure limitBalanced bellows designBody material: CF8M 1.4408Temperature range230 230 230 500 500Pressure range p [psig] S/G/LMaximum -450 to -76 °F 275 720 1440 3600 4000set pressure-75 to -21 °F 275 720 1440 3600 6000-20 to 100 °F 275 720 1440 3600 6000101 to 450 °F 180 Use 1 D 2 495 990 Use 1 1 / 2 D 2 2480 4130451 to 800 °F 80 300 x 150 420 845 1500 x 300 2110 3520801 to 1000 °F 20 350 700 1750 2915Outlet pressure limitConventional design275 275 275 600 720Outlet pressure limitBalanced bellows design230 230 230 500 500Body material: WC6 1.7357Temperature rangePressure range p [psig] S/G/LMaximum 451 to 800 °F – – 510 1015 2540 4230set pressure801 to 1000 °F – – 215 430 1080 1800Outlet pressure limitUse 1 1 / 2 D 2– – 285 285Conventional design1500 x 300 600 740Outlet pressure limitBalanced bellows design– – 230 230 500 500Body material: LCBTemperature rangePressure range p [psig] S/G/LMaximum -50 to 100 °F 265 695 1395 3480 5805set pressure101 to 400 °F 200 615 1230 3075 5125401 to 650 °F 125Use 1 D 2535 1065Use 1 1 / 2 D 22665 4440Outlet pressure limit300 x 1501500 x 300285 285 285Conventional design600 740Outlet pressure limitBalanced bellows design230 230 230 500 500DRemark: SA 352 Gr. LCB is not listed in the API 526. Pressure-Temperature Rating acc. to ASME B16.34 Table 2-1.3The stated Pressure-Temperature Rating are taken from ASME B16.34 Table 2-1.3Due to the extended material test certificate the LESER LCB can be applied as LCC, WCB, WCC and 1.0619with the respective pressure-temperature range as well.LWN 480.01-E01/19