Vent Steam Flow (TPH) = 24.24 × Pressure (PSIA) × Orifice Size (inch) × 0.454 / 1000
For example: Deaerator operating pressure = 1.75 kg/cm²G = (1.75+1) X 14.22 =39.1 PSIA
Vent orifice size = 14 mm = 14/25.4 = 0.55 inches
Then:
Vent Steam = 24.24 × 39.1 × 0.55 × 0.454 ÷ 1000
= 0.236 TPH approximately.
As a thumb rule Deaerator venting capacity will be 0.1% of Boiler MCR
Deaerator Vent Steam Flow Calculator
Calculate Deaerator Vent Steam Flow in TPH
Calculation Formula:
Vent Steam Flow = 24.24 × Pressure (PSIA) × Orifice Size (inches) × 0.454 ÷ 1000
Conversions Used:
1 kg/cm² absolute = 14.223 PSIA
1 inch = 25.4 mm
Vent Steam Flow = 24.24 × Pressure (PSIA) × Orifice Size (inches) × 0.454 ÷ 1000
Conversions Used:
1 kg/cm² absolute = 14.223 PSIA
1 inch = 25.4 mm
Note: The calculation is performed exactly according to the formula provided.
Please verify the formula and applicable design standard before using the
calculated value for actual boiler or deaerator design.