Due to their large free ball passage and low rotational speed they are relatively. Got a similar application? Speak with our pump specialists to help you find a solution for your fluid handling. Rotary lobe pumps are equally suitable for low and high-viscous media. The pump was installed and the customer was happy with the end result. Tapflo’s sanitary twin-screw pump was perfect for this application as it is gentle on the product and can pump products of up to 1,000,000 cPs. Application Details FluidĬheesecake mix containing honeycomb chunksĪfter trialling a few pumps the customer wanted a pump that would keep the marble effect of the cheesecake and not crush any of the solids in the mix. Take a look below at the pump solution we provided for them that would work ideally for the chosen pump application. They needed a pump to cheesecake mix from large 500L mixers and deposit into a production line hopper. Tapflo were recently approached by a cheesecake Company. Selecting a pump for viscous products can be slightly challenging…for some people anyway! Not for the Tapflo team! It’s important to remember that priming a pump can be a difficult task with viscous products, especially if they are thick and sticky like golden syrup for example! It’s also important that flow rates will be dramatically less than shown on performance curves when pumping viscous products! Viscous products tend to get thinner and easier to move when they are heated, it’s important to state the temperature the product will be pumped at! High Viscosity Pump Case Study What is the most important thing to consider when specifying a pump for viscous products? Our Diaphragm Pumps can support products up to about 10,000 cPs, whereas our Lobe and Twin Screw Pumps can support products of up to 1,000,000 cPs. What pump type is best for high viscosity pump products?ĭepending on a number of factors in the process, Tapflo has a number of pumps suitable for highly viscous products. Here at Tapflo, we use centipoise to measure the viscosity of a product, although there are other units of measurement used. For example, water would have a very, very low consistency whereas something like Vaseline would have a very high viscosity. When selecting a pump type for a new or upgraded application for viscous liquids, it is always best to consult with the manufacturers and review all performance, load handling characteristics of the a selected pump.Viscosity is the thickness, stickiness and semi-fluid consistency of a product. The chart shows that as the viscosity of the liquid increases the required head pressure increases, flow capacity decreases and the pump efficiency decreases.įigure 1, Viscosity - Pressure-Capacity Chart for Viscous Liquid Pumps The vertical scales are Head pressure, capacity and correction factors. The bottom horizontal scale is a typical pumps flow capacity and the inner scale is the liquids viscosity. To best understand the effects of viscous liquids, see Figure 1 (Viscosity - Pressure-Capacity Chart) below. Typically these pump types are best for pumping liquids with viscosities less than 200 cp or less. Pumps normally not suited for viscous liquids are centrifugal, flexible impeller, hand operated, and rotary vane pumps. In general, the pumps have increased suction and discharge lines and inlets, lower operating speeds, greater drive motor horsepower capabilities. Gear, piston, peristaltic, progressive cavity, rotary vane, nutating, flexible liner, and diaphragm pumps may be rated for pumping viscous liquids. The effects of an elevated viscosityfor pumping applications is higher operating pressure, increased driving motor demands, lower flow, and possible abrasives handling capability. Fluid viscosity, among other characteristics should be understood when selecting a pump. Pumping viscous liquids can present some challenging technical and design problems. Viscous liquids are fluids that have a medium to high viscosity. Viscous Liquid Pumps are pumps designed to accommodate continuous duty with viscous liquids.
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