Pipeline ancillaries Strainers and filters
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Sizing scenario 2: Customer provides flow rate in m 3 /h (air temperature above room temperature, >20 ⁰C, and at a given pressure) Example conditions: - Flowrate of air = 200 m³/h - Air operating pressure = 4 bar (g) - Air operating temperature = 50 °C (elevated above ambient)
Step 1: Convert m 3 /h to Nm 3 /h V 1 = Volumetric flow (m V 2 = Volumetric flow (Nm
3 /h) = 200
3 /h) = to be determined T 1 = Ambient temperature of air (Kelvin) = 20 ⁰C + 273 = 293 T 2 = Elevated operating temperature of air (Kelvin) = 50 ⁰C + 273 = 323 P 1 = Elevated operating pressure of air (Abs) = 4 bar g + 1 = 5 P 2 = Atmospheric pressure of air (Abs) = 0 bar g + 1 = 1 Solve to find V 2 (Nm 3 /h):
V 2 = (P 1 * V 1 * T 1 ) / (T 2 * P 2 ) V 2 = (5 * 200 * 293)/(323 * 1) V 2 = 907 Nm 3 /h
Step 2: Identify the Capacity Correction Factor for a given operating air pressure using the Capacity Correction Factors for air pressure table For 4 bar (g), correction factor is 0.625 Step 3: Divide the calculated Nm 3 /h by the Capacity Correction Factor and select the housing size using the calculated flow value. 907 Nm 3 /h/0.625 = Calculated Flow value = 1451 Nm 3 /h Select 3"L (DN80L) with a maximum flow capacity of 1920 Nm 3 /h
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TI-P180-44 CMGT Issue 4
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CSF16 and CSF16T Stainless Steel Sterile Air Filters
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