API - Leser

LEOLGeneralThis table is based on the rated coefficient of discharge for steams and gases of LESER safety valves certified by ASME.The appropriated K-values are shown in the column “K-value” of the table.LEO L [inch 2 ] = A 0 [inch 2 ] . ( K ) 0,650LEO L LESER Effective Orifice (for liquid)Orifice acc.API 526Flangerating classValve size d 0 [inch] d 0 [mm] K-valueLEOL[inch 2 ]% of higherorifice% of lowerorificeD 0,110 100,0% 100,0%150 – 600 1 D 2 0,551 14,0 0,343 0,126 64,2% 114,5%900 – 1500 1 1 / 2 D 2 0,551 14,0 0,343 0,126 64,2% 114,5%2500 1 1 / 2 D 3 0,551 14,0 0,343 0,126 64,2% 114,5%E 0,196 100,0% 100,0%150 – 600 1 E 2 0,551 14,0 0,579 0,213 69,2% 108,4%900 – 1500 1 1 / 2 E 2 0,551 14,0 0,579 0,213 69,2% 108,4%2500 1 1 / 2 E 3 0,551 14,0 0,579 0,213 69,2% 108,4%F 0,307 100,0% 100,0%150 – 600 1 1 / 2 F 2 0,709 18,0 0,579 0,351 69,8% 114,4%900 – 2500 1 1 / 2 F 3 0,709 18,0 0,579 0,351 69,8% 114,4%G 0,503 100,0% 100,0%150 – 900 1 1 / 2 G 3 0,886 22,5 0,579 0,549 69,9% 109,1%1500 – 2500 2 G 3 0,886 22,5 0,579 0,549 69,9% 109,1%H 0,785 100,0% 100,0%150 – 300L 1 1/ 2 H 3 1,114 28,3 0,579 0,868 67,5% 110,6%300 – 1500 2 H 3 1,114 28,3 0,579 0,868 67,5% 110,6%J 1,287 100,0% 100,0%150 – 300L 2 J 3 1,417 36,0 0,579 1,405 76,5% 109,2%300 – 1500 3 J 4 1,417 36,0 0,579 1,405 76,5% 109,2%K 1,838 100,0% 100,0%150 – 600 3 K 4 1,693 43,0 0,579 2,005 70,3% 109,1%900 – 1500 3 K 6 1,693 43,0 0,579 2,005 70,3% 109,1%L 2,853 100,0% 100,0%150 – 300L 3 L 4 2,106 53,5 0,579 3,104 86,2% 108,8%300 – 1500 4 L 6 2,106 53,5 0,579 3,104 86,2% 108,8%M 3,600 100,0% 100,0%150 – 900 4 M 6 2,374 60,3 0,579 3,943 90,9% 109,5%N 4,340 100,0% 100,0%150 – 900 4 N 6 2,598 66,0 0,579 4,724 74,0% 108,8%P 6,380 100,0% 100,0%150 – 900 4 P 6 3,150 80,0 0,579 6,940 62,8% 108,8%Q 11,050 100,0% 100,0%150 – 600 6 Q 8 4,154 105,5 0,579 12,070 75,4% 109,2%R 16,000 100,0% 100,0%150 6 R 8 4,980 126,5 0,579 17,353 66,7% 108,5%300 – 600 6 R 10 4,980 126,5 0,579 17,353 66,7% 108,5%T 26,000 100,0% 100,0%150 – 300 8 T 10 6,358 161,5 0,579 28,283 108,8%LWN 480.01-E00/10