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Seven Essential Variables to Consider for Right Pump Selection

While selecting a right pump more amount of information you have, the better it is. Many variables play direct role in the life of pump and also how it will operate. If you are not sure about how you can choose the right pump or the information to know before contacting your vendor, then read this post.

Here we have put together 7 things that you should know while selecting right sanitary pumps to continue your process.

  • Process Liquid Properties    

This is about type of liquid for which the pump is needed and following are properties of process liquid that must be taken into consideration before selecting your pump.

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

Choose the materials of construction that are compatible with process liquid the pump may come in contact with. You can check the chemical compatibility charts to identify the most suitable materials of construction necessary for the pump.

  • Whether the Pump Critical for Plant Operation?

Certain critical applications, where no downtime is acceptable, more expensive, and heavy-duty pumps having special features are chosen. However, you can go for less expensive pumps if pumps are allowed to be removed for servicing and maintenance.

  • Pump Inlet Conditions

Pumps should not be allowed to starve. The Net Positive Suction Head of pump is calculated by considering liquid vapor pressure and pump inlet pressure. Always ensure NPSHA exceeds the required Net Positive Suction Head of pump.

  • Pump Environment

In case, the pump is placed outside, then special installation or construction has to be considered for working under freezing temperature. For hazardous environment that contains dust or explosive vapors then special motor features may be required.

  • Power Source Availability

Common power source used in the USA is either 115-230 Volts/60 Hertz/ for single phase or for 3-phase 230-460 Volts, 60 Hertz supply. Special motors are specified for operations that are outside of the USA by either using DC batteries or transformers.

Pressurized hydraulic oil or compressed air can be also used for power.

  • Pressure and Flow Rate

By knowing the total volume and how much time needed to move all the fluid will decide flow rate. By knowing the pipe size, static lifts, system equipment and friction losses pump differential pressure is calculated.

With proper understanding of the above factors, you can arm yourself with necessary   knowledge to select the pump.