TANK MIXERTHE MOST VALIDATED WATER TANK MIXER.

J & S VERIFIED BY EXTENSIVERESEARCH AND TESTING

THEORY BEHIND J & S’S MIXING EFFICIENCY

• For turbulent jet mixers entrainment (draw-in and transport of ambient fluid) alone sets up the upper limit of mixing efficiency.

• The volume enclosed by the outer interfaces of the fluids to be mixed determines mixing efficiency.

• Mixing efficiency is directly proportional to the number of turbulent jets.

J & S Tank Mixers eliminated ice damage and degradation of water quality at thaw in mid-western states.J & S Tank Mixer’s high mixing efficiency depends on tank turnover. It is good practice to have a full tank volumetric turnover every two days.J & S can provide a tank draft-fill strategy to improve water turnover at tanks with hydraulic restrictions.The J & S Tank Mixer can help address water quality problems and meet regulatory requirements.

• Drastic improvement in water quality

• No periodic maintenance

• No power connection

• No operating cost

• Low life cycle cost

• Powered by the tank draft fill cycle

J & S Tank Mixer configurations were optimized using modelsthat investigated the combined effects of multiple turbulentjet interaction, diffusion, and buoyancy.

THE J&S TANK MIXING SYSTEM WILL:

• Distribute disinfectant uniformly

• Eliminate stagnation

• Eliminate short circuiting

• Mix in both fill and draft cycles

• Reduce water age

• Reduce Disinfected By Product (DBP) formation

• Reduce/Eliminate Icing

• Reduce/Eliminate Nitrification

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J & S modeling of particle path versus time shows the curving movement of the folding patterns of an efficient mixer. J & S Tank Mixers have been mixing efficiently for over 20 years. The J&S Tank Mixer provides the ultimate in water mixing while providing these features:

THE PROVEN SOLUTION TO WATER QUALITYPROBLEMS IN TANKS

J&S mixer configurations were optimized using models that investigated the combined effects of multiple turbulent jets interaction, diffusion and buoyancy.

LIVE FIELD TESTS PROVE PERFORMANCEExtensive test data collected from operating tanks showed a chlorine residual Coefficient of Variance (COV) of less than 0.05 while thermal COV was less than 0.02.

J & S Tank Mixer configurations were optimized using models that investigated the combined effects of multiple turbulent jet interaction, diffusion, and buoyancy.

**Statistical measurement of the dispersion of data points

PERFORMANCE OF J&S TANK MIXER

The graph above shows performance of a J & S Tank Mixer installed in May 2004 in a 3 MG tank in Ohio.The chlorine residuals increased from an average of 0.6 to 1.0 mg/L after installing the mixer without anyoperational changes. Similar results were achieved at other installations.

J & S offers tank mixer systems as a research based, well validated and field-tested solution to your storage tanks’ water quality problems.

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MIXING SYSTEMS FORSTAND PIPE APPLICATIONS

NEW SYSTEM FOR SMALL TANKS

Out flow during draft is taken from different elevations and from different

directions blending water from all directions and elevations of the standpipe

In flow during fill is delivered to different elevations and in different directions

distributing water to all directions and elevations of the standpipe

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Out-FlowStreamlines

In-FlowStreamlines

Surface Out-FlowThrough Cone

Perimeter

Out-FlowStreamlinesTyp. 4 sides

Metered OutflowCheck valve

if needed

Orifices

Stainless steel pipeSupported off Shelf

Connect bottom of riser to tank’s inlet/outlet

Float

Guide Cables

Pipe, length, diameters and number of orifices are sized according to tank size and flow rates

MIXING SYSTEMS FORSTAND PIPE APPLICATIONS

NEW SYSTEM FOR LARGE TANKS

Out flow during draft is taken from different elevations and from different direction blending water from all directions and

elevations of the standpipe. Flow paths for metered outflow valve not shown for clarity.

In flow during fill is delivered to different elevations and in different directions

distributing water to all directions and elevations of the standpipe

Out-Flow Flow Paths In-Flow Flow Paths

Surface Out-FlowThrough Cone

Perimeter

Surface Out-FlowThrough Cone

Perimeter

Out-FlowStreamlinesTyp. 4 sides

Orifices

Orifices

Float

Float

Pipe, length, diameters and number of orifices are sized according to tank size and flow rates

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J & S TANK MIXER OPERATING PRINCIPLESAn energy recovery cone provides flow distribution at the water surface. The mixer floats at the water surface down to minimum design level. Orifices are brought on and offline, based on water level, to enhance distribution.

FILL CYCLEThe cone inside the diverging nozzle distributes the flow and directs it along the water surface towards the outer perimeter of the tank. The fresh water will mix with the water at the surface and maintain its residual. A boundary layer will attach to the sides of the tank. Since the outlet floats with the water surface the mixing-cone does not add any additional static head, saving considerable energy. It does not create water falls or excessive chlorine dissipating turbulence. The mixing recovers some of the velocity head due to the larger nozzle area. The energy saved by elimination of additional static head may, depending on flowrates, provide a pay back. Water is also introduced through orifices along the stems.

DRAFT CYCLEWater is drafted out of the tank through the cone, orifices and the check valve at the bottom, blending the water and eliminating stratification or layer effect. The floating inlet allows for continuous water removal fromthe surface which typically has the least chlorine residual.

Bottom outlet only devices do not draft from the surface or intermediate elevations.

3 Million Gallon Tank

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SMALL TANKS(SINGLE STEM)

J & S TANK MIXER OPERATING PRINCIPLESMultiple energy recovery cones provides flow distribution at the water surface. The mixer floats at the water surface down to the minimum design level. Orifices are brought on and offline, based on water level, toenhance distribution.

FILL CYCLEThe cone inside the diverging nozzle distributes the flow and directs it along the water surface towards the outer perimeter of the tank. The fresh water will mix with the water at the surface and maintain its residual. A boundary layer will attach to the sides of the tank. Since the outlet floats with the water surface the J & S Tank Mixer does not add any additional static head, saving considerable energy. It does not create water falls or excessive chlorine dissipating turbulence. The mixing recovers some of the velocity head due to the larger nozzle area. The energy saved by elimination of additional static head, may depending on flowrates, provide a pay back.

DRAFT CYCLEWater is drafted out of the tank through the cones, orifices and the check valve at the bottom, blending the water and eliminating stratification or layer effect. The floating outlets allow for water removal from the surfacewhich typically has the least chlorine residual.

Bottom outlet only devices do not draft from the surface.

10 Million Gallon Tank

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LARGE TANKS(MULTIPLE STEM)

2323 1st Street Huffman, Texas 77336

T: 281.324.3990 | F: 281.324.6879 | E: Sales@jandsvalve.com

JANDSVALVE.COM

09-18-2019

IMPROVING THEINDUSTRY STANDARD.

A PROVEN REMEDY FOR

• Stagnation

• Stratification

• Short Circuiting

REQUIRES NO ADDITIONAL POWER OR MAINTENANCE

Since its installation in 1998, the first mixing system in a water distribution tank continues to improve water quality without operating maintenance, or power cost.

• Icing

• Nitrification

• DBP Accumulation