In this post I want to share to you how to estimate pump efficiency. An equation was developed by Carl Branan, author of the Process Engineer’s Pocket Handbook. Pump efficiency can be estimated by using equation below:
When sizing discharge pressure of pump, we need to consider at least two things: target pressure at destination point and pressure loss from source point to destination point. How if we have two different destination points? How do we properly size pump discharge pressure?
In this post I want to share you simple method to size discharge pressure of pump when you have more than one destination point. Read More
As a process engineer, I sometimes dealing with pumps. I usually feel confuse when I read pump specification or graphs offered by vendors. Here in this post, I want to share you some knowledge about pumps terminology that you may hear before what don’t really understand the meaning.
I create mind map for several most-often-used pump terminology that come to my mind. I’m sorry if the arrangement is a bit messy :D.
Since I have involved in the current project, which is EPC project, I always want to make some short writing and simple guideline to create piping and instrumentation diagram (P&ID) for several equipments, such as pump, tank, vessel, compressor, and so on. This post will be my first post on simple guideline related to configuration of pump in piping and instrumentation diagram.
Figure above reprsents typical piping and instrumentation diagram of pump. Pump should have:
Pump Symbol. Make sure you use proper pump symbol. As for example above, I use centrifugal pump. Check your P&ID legend
All the nozzles should be correctly represented with size and flanges. Generally, the suction and discharge nozzles on the pump are smaller than suction and discharge line sizes. Appropriate reducer / expander to be clearly indicated in such cases.
Strainer. In the example above, I install Y-strainer. The strainer is used to separate debris from the liquid
Check valve. Check valve shall be installed to prevent liquid flow reversal with the succession of pumping
Globe valve. Globe valve installed at discharge line to regulate the flow of liquid
Pressure gauges are normally to be provided on suction and discharge line
Inlet and outlet lines are the next to be drawn up. Line number, material class, size, pressure rating, etc. is to be correctly assigned to each of the lines.
Drains and vents to be provided on the suction / discharge lines