Recent content by JChemP

Did you get given the equation for x? x = dp / P1 x limit = xT * Fk If dp / P1 > xT * Fk then your flow is choked and x = xT * Fk If dp / P1 < xT * Fk then your flow is not choked and x = dp / P1 This determines what x you use in the sizing equation. (NOTE make sure you use bara in all your...

The pressure downstream of your valve will not be atmospheric. As the RO is there to restrict the flow the pressure upstream will be 0.3 barg. The flow through the orifice can be calculated using nozzle flow equations (See CRANE technical paper) The length of line downstream of your RO also...

It's worth noting that it is possible for the pressure at your vent outlet to be higher than atmospheric pressure if you have critical flow. i.e mach 1 conditions at vent outlet. For the vent pressure drop you need to use the density at downstream pressure which will be be the backpressure...