![]() ![]() Let our team help you make the right pump decisions and get the most out of your pump system. 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. For any rotodynamic pump, as viscosity goes up, pump performance diminishes due to increase in friction. This will decrease friction and prevent drag loss. Gear pumps are the most common type of positive displacement pumps, which are often used in pumping relatively high viscous fluid such as hydrocarbons, motor oil, liquid fuels and adhesives. 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. While the curve we have generated is not conclusive it is a fair estimation of the degree of losses in terms of pump flow capability as the viscosity increases.There are many different types of fluids being pumped throughout the world every single day. The diaphragm pump will deliver progressively less of a % of its low viscosity rated flow, normally based on water in the performance curve.Īs the viscosity elevates the % of flow the pump is capable of delivering reduces as per the indicated curve above. Viscosity reduces the capability of the air diaphragm pump’s performance. However, when his pump unit needs to pump a thicker fluid like a heavy gear oil this same unit will only produce a flow of 60 litres per minute? The pumps are often mounted onto a base plate and carried in the back of a truck or trailer to be used to dewater trenches or to extract oils from oil traps etc.Įvery once in awhile we will have a very confused customer who normally pumps a water effluent from a sump at 100 litres per minute with a 1″ pump. Many customers use pneumatic diaphragm pumps for general pumping applications. ![]()
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