Seven Variables for Selecting A Pump

Several variables can play a main role in the life of a pump and how it is going to operate. In case, you are not sure about selecting a right pump, or the information that you must know before meeting a vendor, then you must read this post.

Here, we have put together 7 things that you must know while selecting a suitable pump for the process.  

• Process liquid properties    

First of all, decide the type of liquid the pump will be used for. Following are few process liquid properties which must be considered while selecting a pump.

• Abrasive or Non-abrasive
• Liquid viscosity
• Shear sensitive
• Solids present and concentration
• Specific gravity
• Temperature
• Vapor pressure

• Materials of construction

Find out the material of construction that are compatible with the process liquid or other liquids your pump may come into contact.

There are chemical compatibility charts available to identify the compatible materials of construction necessary for the pump.

• Whether the pump really critical for plant operation?

In various critical applications, no downtime is allowed, then you need to choose more expensive and heavy-duty Sanitary Pumps having special features.

• Pump inlet conditions

If you don’t like to starve your pump then NPSH available will be calculated by considering liquid vapor pressure and pump inlet pressure. Always ensure NPSHA must exceed pump NPSH required.

• Pump environment

In case, you want to mount your pump outside, then consider special construction for installation in freezing temperature condition.

If the environment is too hazardous, that contains dust or explosive vapors, special motor features may be required.

• Power source availability

Common power source available in USA is 115-230 Volts with 60 Hertz and single phase or it can also be 230-460 Volts at 60 Hertz with 3-phase.

Consider for special motors to operate in outside of the USA or prefer to use DC batteries. For power, pressurized hydraulic oil or compressed air can also be considered.

• Flow rate and flow pressure

By knowing your total volume and also how much time needed to move fluid will decide flow rate.

You can calculate pump differential pressure by knowing pipe sizes, system equipment and static lifts friction losses and select suitable Sanitary Pumps too.

With proper understanding of the above factors, you can arm yourself with all the knowledge required for selecting the right pump. Whatever be your application, you can now feel confident for your next selection of pump.