As resistance to flow increases, so does the ability of any pump to ‘suck’. The pump simply creates a vacuum into which atmospheric pressure moves – or tries to move – the fluid into the pump. Suction side – getting it into the pump – The first and often most challenging aspect of high viscosity pumping is on the suction side of the pump.There are several challenges to consider when selecting a pump for higher viscosity fluids: When choosing a process pump, industrial professionals must keep these considerations in mind to determine the optimal pump technology. Including, but not limited to viscosity characteristics (thixotropic, dilatant, Newtonian), temperature, flow rate, pipe size and length. There are several factors to consider when pumping a high viscosity fluid. As higher viscosity fluids act less like a liquid and more like a solid, they present a pumping challenge. Viscosity is a measure of a fluid’s internal resistance to flow. Let our team help you make the right pump decisions and get the most out of your pump system.HIGH VISCOSITY PUMPS FOR DIFFICULT TO PUMP FLUIDS Choosing a pump designed to handle the specific viscosity range of your process fluid(s) can make a significant difference.įor help with pump selection and custom configuration based on your specific pumping application and process fluids or materials, contact DXP Pacific today. Pump manufacturers and distributors can provide product specs relating to a pump’s viscosity capabilities. You can research known viscosities of most common fluids, which are normally listed in units of SSU (Saybolt Seconds Universal) or CST (centistokes). Selecting the right pump equipment and configuring your system will require careful planning. This will decrease friction and prevent drag loss. You will also want to consider making the pipework size larger throughout the system. It is very important to make sure there are no restrictions on the suction side. In addition to pump selection, fluid viscosity can also help determine pump system configuration and operating practices. They can effectively handle fluids with both low and high viscosities and can run dry without the risk of major pump failure. Peristaltic pumps are another popular pump option, especially in applications with variances in viscosity. If variables like temperature cause the fluid to increase or decrease in viscosity, you could start to experience performance issues. The optimized performance can be achieved by keeping higher-viscosity fluids running through the pump system at consistent temperatures. Positive displacement pumps are able to operate at lower speeds and offer variable flow rates, which is great for fluids with thicker viscosities. Examples include vane pumps, hose pumps, diaphragm pumps, gear pumps, and screw pumps. There are a number of different types of positive displacement pumps suited for various fluids, viscosities, and specialty applications. Positive displacement pumps are commonly used for more viscous fluid applications. High-viscosity liquids can dramatically affect centrifugal pump performance, energy efficiency, and flow rates. Positive Displacement PumpsĪs viscosity thickens, there will usually be an increased amount of power drawn to move the fluid through the pump system. Centrifugal pumps are often a standard choice for these less-challenging processing applications. Pump selection is typically not as difficult when dealing with low-viscosity fluids. When it comes to pump selection, fluid viscosity is one of several key factors along with other application-specific criteria for your operation’s ideal pump system. Temperature can also affect fluid viscosity, as higher heat tends to lower the viscosity of pumped fluids. High-viscosity fluids like syrups and many oils move slower, with the fluid maintaining more consistent integrity. Low-viscosity fluids like water or most beverages will generally move through a pump system rather easily with low resistance. Fluid viscosity is one of the most important factors to consider when selecting pumps and configuring a system for optimized performance. From clean water to thick slurries and everything in between, every type of liquid will flow through its respective pump system differently. There are many different types of fluids being pumped throughout the world every single day.
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