CHECK SAMPLE SYSTEM PRESSURE DROP Correctly calculating and managing the loss is crucial for proper performance

摘要

THE FINAL step in designing sample lines for your analytical sampling system is to assess whether enough pressure differential exists between the process tap and the return point to drive the flow you want through the lines.If the differential isn't sufficient,you may have to apply a different design strategy.At this stage of the design process,you already will have made numerous decisions related to your system layout and performance.You've decided on whether to use a single-line system(Figures la and lb)that disposes of samples via a vent or drain,or a fast-loop system(Figures lc and Id)in which the sample returns to process(see:”Choose the Right Sampling System Transport Line,”http://bit.ly/2QdgAzx).You've estimated your time delay and made adjustments to meet your acceptable target.You've made design decisions related to fluid velocity and flow,and found whether laminar or turbulent flow(Figure 2)occurs in your sample lines(see:”Consider Flow Regime's Impact on Sample Analysis,”http://bit.ly/2EBrc2f).