The Souders-Brown equation is used as the effective tool for getting the maximum allowable vapor velocity in vapor-liquid separation vessels (variously called flash drums, knockout drums, knockout pots, compressor suction drums and compressor inlet drums). Here is the online Souders-Brown Equation calculator which will be the very useful online tool for you to calculate the maximum allowable vapor velocity in m/s units within the blink of an eye.
Calculate the maximum allowable vapor velocity in the vapor-liquid separation vessel with the liquid density of 50 kg/m³, vapour density of 35 kg/m³ and vapour velocity factor (K) of 10 m/s.
Maximum Allowable Vapor Velocity = ( 10 x √((50 - 35) / 35) )
= 6.5465 m/s