Crosby LAB70AA191(*) 1.5G2.5 HSJ-66-C 1 1/2" 1500RF x 2 1/2" 300RF Conventional Direct Spring Op
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| luid Properties Molecular Weight M 18,020 18,020 Ratio of Specific Heats k 1,310 1,310 Inlet Stagnation Enthalpy ho 2667,0 KJ/kg 2667,0 KJ/kg |
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| Process Cond. Required Mass Flow Wreq Set Pressure Pset 1790,6 psig 123,458 barg Over Pressure Pover 53,718 psig 3,704 barg Inlet Line Loss Ploss 0 psig 0 barg Back Pressure Pback 0 psig 0 barg Atmospheric Pressure Patm 14,696 psia 1,013 bara Relieving Temperature T 329,736 °C 602,886 °K Distance from Valve (noise) r 1 m 1 m Rupture Disc CCF Kc 1,0 1,0 Superheat Correction Factor Ksh 1,0 1,0 Supercritical Correction Factor Ksc 1.0 1.0 |
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| Valve Data Discharge Coefficient (actual) Kd 0,975 0,975 Discharge Coefficient (derated) K 0,878 0,878 Orifice Area A 0,503 in² 3,245 cm² Back Press. Correction Factor Kb 1,0 1,0 Outlet Diameter Do 63,22 mm 6,32 cm |
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| Calculate Inlet Relieving Pressure, Outlet Pressure, Absolute Pressure Ratio | |||
| P1 = Pset + Pover - Ploss + Patm | P1 | 128,175 | bara |
| P2 = Pback + Patm | P2 | 1,013 | bara |
| PR = P2 / P1 | PR | 0,008 | |
| Calculate Napier Correction Factor Kn 1,017 If (103.4 bara ≤ P1 ≤ 220.6 bara) and (Kn > 1), then Kn = (2.7644 * P1 - 1000) / (3.324 * P1 - 1061), else Kn = 1.0 |
Calculate Capacity of Selected Valve W 19486,799 kg/hr 19486,799 kg/hr
W = 52.5 * A * P1 * K * Kb * Kc * Kn * Ksh * Ksc
Calculate Required Orifice Area Areq
Areq = A * Wreq / W
| Printed On: 8-jun.-2021 | PRV²SIZE Software Version pr7_20200901.1 | Page : 2 |
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