Dynamic viscosity is the frictional force between the liquid layers. It is measured with a viscometer that uses mechanical rotational resistance to discs that are placed in the fluid. They have the units of Centipoise (cP) or Pascal-second (Pa-s). Kinematic Viscosity removes the density to see how the behavior of the fluid flows. This type of viscosity is measured with funnels or tubes to see how long gravity will pull the fluid through under its own weight. The units for this type of viscosity are Centistokes (cSt) or M2/sec. Both types of viscosities are easily changed with temperature. To convert the kinematic viscosity to dynamic viscosity, you only need to divide the dynamic viscosity by the fluid’s density in grams per cubic centimeter (g/cm³), reference Equation 1. Because the density changes with temperature, the conversion is fluid specific. Why do I bring this up? If you are looking to transfer different fluids, EXAIR has a solution for you.
Equation 1:
Kinematic Viscosity = Dynamic Viscosity / density
Not all liquid vacuums are the same. Have you seen motor burnout, loud noises, single directional flow, and potential electrical hazards? EXAIR manufactures a pneumatic venturi pump to remove all those issues, the High Lift Reversible Drum Vac System. It does not have any moving parts to wear; a two-way action to fill or expel liquid from standard drums; and is quiet. They only use compressed air to generate a powerful vacuum to lift liquid into a drum; and with a simple twist of the knob, it will push the liquid out. And by using compressed air, no electricity is required, making it safe to use. They work great for fluid transfers or liquid spills, and the High Lift Reversible Drum Vac can fill a 55-gallon (208L) drum in 85 seconds from 15 feet of lift. And with the powerful vacuum pressure, it can move thick liquid with viscosity up to 1400 Cp through 20 feet (6m) of hose. How can this product be useful for you? If you work with liquids in a cistern, underground tanks, higher viscous fluids, or pits, EXAIR has a product for you; the High Lift Reversible Drum Vac System. They are reliable and simple to use, and that is why it was awarded the 2015 Product of the Year by Plant Engineering. In this blog, I will go over the specifications and packages that EXAIR offers.
The High Lift Reversible Drum Vac pump has stainless steel construction for corrosion resistance. It comes with a built-in safety relief valve to avoid over pressurizing and an internal float to stop any over-filling of the drum. The air consumption is only 43 SCFM (1,218 SLPM) at 80 PSIG (5.5 Bar), and it has a quiet noise level of only 83 dBA. Systems are available in 30-, 55- and 110-gallon capacities (114L, 208L, and 418L respectively) in different packages.
The standard package will include the two-way pump assembly, shutoff valve, 20′ (6m) vacuum hose, a 90° quick release elbow, a standpipe, and an aluminum chip wand. The standpipe is cut to length for the properly sized drum (the drum is not included in this option). The standpipe extends inside the drum to remove as much liquid as possible when emptying.
The Deluxe package will include all the items shown above in the Standard package and adds a drum dolly, ABS spill recovery kit, (2) extension wands, crevice tool, skimmer tool and a magnetic toolholder.
The Premium package will include all the items in the Standard package and adds the drum with lock ring and lid, drum dolly, ABS spill recovery kit, (2) different lengths, aluminum crevice tools, skimmer tool, a magnetic toolholder and a 20′ (6m) compressed air hose.
With the relationship between dynamic and kinematic viscosities, you can determine the best EXAIR Industrial Housekeeping Product to transfer or discard. If you have any questions about the High Lift Reversible Drum Vac System, you can contact an Application Engineer at EXAIR. We will be happy to help you.
John Ball
Application Engineer
Email: johnball@exair.com
Twitter: @EXAIR_jb
