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Neptune delivers pump systems for use in the reliable and safe handling of chemical fluids used for water treatment applications in municipalities, general industries and agriculture.

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Mixer Selection Guide

Selecting the proper mixer depends on a number of parameters, including the size of the batch, the viscosity of the components, final product, and other parameters. To help you select the proper Neptune mixer for your application, we have developed the following guide to provide users with valuable information such as specifications, dimensions and dimensional drawings.

Neptune Mixer Selection Chart

The chart below is intended to provide some basic guidelines for selecting the proper Neptune mixer(s) that offers mild blending of various viscosity liquids in different size tanks.

The information provided is based on an approximate mix/ blend time of two liquids for 30 minutes, with both liquids already in the tank. Mixing times will be shorter if one liquid is added to a second liquid while the mixer is operating. Powders should always be added while the mixer is running.

This chart also applies to the suspension of solids with settling velocities of less than one foot per minute.

For more rapid or vigorous mixing, use a mixer one or two sizes larger.

Dual propellers are recommended for tanks 1,000 gallons (3,785.4 liters) and larger at viscosities of 1,000 cPs and higher.

Viscosity cPs Up To
50 Gallons 
(189.3 Liters)
Up To
100 Gallons
(378.5 Liters)
Up To
200 Gallons
(757.1 Liters)
Up To
500 Gallons
(1,892.7 Liters)
Up To
1,000 Gallons
(3,785.4 Liters)
Up To
2,000 Gallons
(7,570.8 Liters)
Up To
3,000 Gallons
(11,356.2 Liters)
Up To
5,000 Gallons
(18,927.1 Liters)
≤1 BN-3.0 BN-3.0 JD-2.0 JD-2.0 JG-2.0 JG-2.0 JG-2.0 JG-4.0
≤100 BN-3.0 BN-3.0 JD-2.0 JG-2.0 JG-2.0 JG-2.0 JG-3.0 JG-5.0
≤300 BN-3.0 BN-3.0 JG-2.0 JG-2.0 JG-2.0 JG-4.0 JG-5.0 JG-5.0
≤500 BN-3.0 JG-2.0 JG-2.0 JG-2.0 JG-3.0 JG-5.0 JG-6.0 JG-7.0
≤1,000 JD-2.0 JG-2.0 JG-2.0 JG-2.0 JG-4.0 JG-6.0 JG-7.0 JG-8.0
≤2,000 JG-2.0 JG-2.0 JG-3.0 JG-3.0 JG-5.0 JG-6.0 JG-8.0 JG-9.0
≤3,000 JG-2.0 JG-2.0 JG-4.0 JG-4.0 JG-6.0 JG-8.0 JG-9.0
≤5,000 JG-2.0 JG-2.0 JG-5.0 JG-5.0 JG-7.0 JG-8.0
≤15,000 JG-3.0 JG-3.0 JG-5.0 JG-8.0 JG-9.0 JG-9.0
≤25,000 JG-6.0 JG-7.0 JG-8.0 JG-9.0

For full specifications and information on the above mixers: Series JG, Series JD, Series BN

Proper Mixer Mounting and Positioning

In most applications involving small mixing tanks of 1,000 gallons (3,785.4 liters) or less, the mixer is clamped to the side of the tank. Optimum mixing will be achieved when the mixer is angled from the tank wall, either off-center (figure 1) or on-center (figure 2). Improperly mounting a portable mixer will greatly lessen mixing efficiency, cause vibration, and could possibly damage the mixer.

Angling off-center is preferred when good material turnover is required, as in mixing slurry. Angling on-center is desired for more gentle mixing and when vortexing must be minimized.

Larger size tanks may require that a mixer be mounted directly in the center of the tank with the shaft vertical (figure 3). When a mixer is used in this arrangement, baffles are recommended to prevent the contents of the tank from turning in the direction of the mix. If this occurs, mixing action will be poor.

Such baffling will avoid vortexing and allow mixing to be as thorough as possible. Neptune suggests that four baffles be used, located 90° apart and sized approximately 1/12 of the tank diameter. The baffle should not fully extend to the bottom of the tank and a gap should be provided between the baffle and the tank wall.

mixer-selection-guide-figure-1

FIGURE 1 – Angling the portable mixer off-center is the position recommended by Neptune for rapid turnover of tank contents and good bottom washing.

mixer-selection-guide-figure-2

FIGURE 2 – On-center angling will produce good mixing with minimum vortexing. Tank contents turn over thoroughly but gently.

mixer-selection-guide-figure-3

FIGURE 3 – For mixing in larger tanks, the mixer is often placed vertically on-center. In this configuration, baffles are recommended to prevent the contents of the tank from rotating, avoid vortexing and achieve good mixing and top-to-bottom turnover.