TMS Brochure 2017
1. TIDEFLEX ® MIXING SYSTEM - The Science Behind the Simplicity
4. TIDEFLEX ® MIXING SYSTEM The Science Behind the Simplicity TMS in Circular, Rectangular and Irregular Tanks In circular, rectangular and irregularly-shaped reservoirs, the diameter or length is greater than the depth. A single fi xed-diameter inlet pipe (common or separate from outlet pipe) results in short-circuiting, poor mixing and dead zones in areas away from the inlet because the momentum is concentrated in one localized area of the tank. The TMS achieves complete mixing through a horizontal manifold with multiple Tidefl ex ® Inlet Nozzles that distribute the momentum across the tank. The Waterfl ex ® Outlet Valves are strategically located on the manifold to eliminate short-circuiting. For tanks with separate inlet and outlet pipes, the TMS is installed on the inlet pipe. Problem Poor mixing with a single fi xed-diameter inlet pipe results in water quality problems. Problem Standpipes are prone to stratifi cation, incomplete mixing and poor water quality. Solution Complete mixing is achieved during every cycle by placing Tidefl ex ® Inlet Nozzles vertically in the standpipe. Custom Design for Every Tank Style Based on Size, Volume, Dimensions, Flow Rates and Volume Turnover 6 7 TMS in Standpipes Standpipes are greater in depth than diameter and can exceed 140 feet (43 m) tall. They are extremely prone to short-circuiting, incomplete mixing and water quality decay, especially in summer when colder inlet water sinks, resulting in temperature stratifi cation and increased water quality issues. The TMS uses a vertical manifold with multiple Tidefl ex ® Inlet Nozzles at various elevations, which distribute momentum throughout the depth of the tank and achieve complete mixing. To eliminate short- circuiting, the Waterfl ex ® Outlet Valves are strategically located on the bottom of the TMS riser. For tanks with separate inlet and outlet pipes, the TMS is installed on the inlet pipe. Solution Multiple Tidefl ex ® Inlet Nozzles circulate water throughout the tank with every fi ll cycle.
5. TIDEFLEX ® MIXING SYSTEM The Science Behind the Simplicity Problem With so much of its area exposed to the elements, elevated tanks are prone to problems of poor mixing, stratifi cation and water quality degradation. TMS in Wet Riser Elevated Tanks Multi-column or multi-leg tanks are highly prone to water quality issues. Often the wet riser is 3-12 feet in diameter, running from ground level to the bottom of the tank, where it enters the bowl. At ground level, the inlet-outlet pipe penetrates the bottom of the wet riser and is signifi cantly smaller in diameter than the wet riser. As a result, water velocity is severely reduced when it enters the wet riser from the inlet-outlet pipe. This drastically reduced velocity is not suffi cient for mixing, making these tanks highly prone to thermal stratifi cation and short-circuiting in warmer months when inlet water is colder. The colder water is denser and remains at the bottom of the tank during the fi ll cycle and the momentum of the infl ow of the wet riser is almost always too low to provide complete mixing. To achieve complete mixing, the Tidefl ex ® Inlet Nozzles are located up in the bowl or vertical riser. Waterfl ex ® Outlet Valves are located at the bottom of the wet riser, near ground level. Problem With a fi xed-diameter inlet pipe at the bottom of the tank, only the water at the very bottom gets mixed. Solution The entire tank is mixed through Tidefl ex ® Inlet Nozzles placed up in the bowl. This confi guration prevents icing and other water quality problems. 8 9 TMS in Dry Riser Elevated Tanks Elevated tanks are prone to poor mixing in summer and icing in winter, due to a large surface area exposed to the sun and the elements. The inlet- outlet pipe of Sphere-Spheroid, Fluted-Column and Composite Elevated Tanks (CET) runs up the pedestal, or dry riser, and penetrates the bottom of the bowl. For tanks with common inlet-outlet pipes, the TMS is a vertical manifold with Waterfl ex ® Outlet Valves near the bottom of the bowl. This separates the inlet and outlet and eliminates short-circuiting. Multiple Tidefl ex ® Inlet Nozzles are located at various elevations and discharge angles along the vertical riser to achieve complete mixing and will minimize the possibility of icing. For tanks with a separate outlet pipe, the TMS manifold is installed on the inlet pipe. Solution Multiple Tidefl ex ® Inlet Nozzles at multiple angles and elevations completely mix the tank. Custom Design for Every Tank Style Based on Size, Volume, Dimensions, Flow Rates and Volume Turnover
7. 600 N. Bell Avenue Carnegie, PA 15106 www. tidefl ex .com PHONE: 412/279-0044 FAX: 412/279-7878 The information presented in this catalog is provided in good faith. Tidefl ex ® Technologies reserves the right to modify or improve its design specifi cations without notice and does not imply any guarantee or warranty for any of its products from reliance upon the information contained herein. All orders are subject to Tidefl ex ® Technologies’ standard terms and warranty and are subject to fi nal acceptance by Tidefl ex ® Technologies. Tidefl ex ® and Waterfl ex ® are registered trademarks of Tidefl ex ® Technologies. © Tidefl ex ® Technologies, 2014, All Rights Reserved. RECYCLABLE PAPER TMS 7/14 The Tidefl ex ® Mixing System (TMS) has been installed in thousands of tanks and reservoirs as small as 2,000 gallons, to over 150.0 million gallons. The TMS has been fi eld validated in every tank style with sampling and monitoring studies conducted by water utilities, proving it improves storage tank water quality. Whether you would like to determine if your tanks are stratifi ed, or if you have mixing systems and want to confi rm the tanks are mixed, Tidefl ex ® Technologies has water quality sampling equipment available to sample your tank water quality throughout the depth. The products contained in this brochure are covered under one of the following patent numbers: US 7,104,279 (US), US 6,016,839 (USA), CA 2,409,009 (Canada). Field Validation and Water Quality Sampling Equipment Temperature Profi ling Chart Colorimeter Depth Sampler Temperature Data Logger String The available monitoring equipment and services include: • Temperature Data Logger (TDL) Strings that continuously monitor temperature within your tank for an extended period of time. The Data Loggers are pre-programmed for deployment. • Depth Samplers that obtain grab samples at various depths within your tank for water quality analysis. • Pocket Colorimeters that can be used to obtain free and total chlorine residuals. Once the equipment is returned, the data is downloaded and analyzed. A report with the data is compiled and provided to the customer. Contact Tidefl ex ® Technologies for more information about these services.
6. TIDEFLEX ® MIXING SYSTEM The Science Behind the Simplicity With the OSV installed above the end of an overfl ow, you achieve two deterrents; the Tidefl ex ® Series 37 cannot be seen, and it is extremely diffi cult to access, manipulate or damage. Red Valve engineers provide a detailed Overfl ow Pipe Hydraulic Analysis to size and locate the Tidefl ex ® Valve and/or OSV, based on tank dimensions, overfl ow pipe size and material, air gap distance and peak fl ow rate. The maintenance-free Passive TMS has proven to mix tanks and mitigate icing problems with as little as 5% volume turnover, while using the inherent energy source of the fi ll and draw cycles. Active 24/7 mixing is almost never required. Installing fl oating or submerged mechanical mixers inside of storage tanks forces the owner to pay for an additional energy source, when the power has already been paid for once. It puts additional operational and maintenance costs on the owner, especially because mechanical mixers require maintenance and can be diffi cult to access. For tanks with very low turnover or in extremely cold climates, the Passive TMS is easily made into an Active TMS using a recirculation pump, creating the Pass-Active TMS. This item can be utilized seasonally, as needed. With the Pass-Active TMS, the passive TMS is installed in the tank, where it does not need maintenance. The recirculation pump is installed in the valve vault or an adjacent structure, where mechanical parts are easily inspected and maintained. The pump is low fl ow, head and energy because it pulls water from the tank and puts it back into the tank. Red Valve engineers size the recirculation pump and provide a Mixing Analysis. Safer, Easier Chemical Injection The Pass-Active TMS can also be used for chemical injection to boost chlorine in free chlorine systems or chlorine and ammonia for systems on chloramines. Used in this way, the chemicals are completely mixed within the tank. This system eliminates the need to climb to the top of the tank to add chemicals. It ensures that water of a more consistent quality is leaving the tank. A Secure, Reliable Choice for Overfl ow and Drain Pipes Municipalities are challenged with protecting water storage tanks against contamination. Insects, rodents, birds, or tampering can cause serious health risks. Tidefl ex ® Check Valves provide a reliable, cost-effective and maintenance-free solution compared to screens and fl ap valves. Either fl anged, or clamped onto the end of an overfl ow pipe, Tidefl ex ® Valves are very reliable for overfl ow pipe protection. The all-rubber construction of Tidefl ex ® Valves prevent rust, corrosion, and mechanical failure. Because they are non-mechanical, Tidefl ex ® Overfl ow Valves do not require maintenance and will drain completely after an overfl ow event. Tidefl ex ® Valves are virtually impossible for rodents, birds and insects to penetrate. Unlike mesh screens and fl apgate valves, Tidefl ex ® Check Valves will not corrode, dislodge, freeze open or shut. Hard At Work in Any Situation A Smarter Way to Achieve Active Mixing and Chemical Injection Pass-Active TMS keeps the pump outside the tank, for easy access and maintenance. Mixing a tank 24/7 will not reduce water age. The Pass-Active TMS can also be used for forced drawdown where the pump discharges back into the distribution system to force the tank to draw down. Once the pump is called off, the tank refi lls and mixes through the passive TMS. Both mixing and water age are addressed with the forced drawdown scenario. Caution Overfl ow Security Valve (OSV) After 9/11, Red Valve Company’s engineering team developed the Overfl ow Security Valve (OSV) to help our water utility customers address the increased need to secure their water supply from a potential terrorist attack. The OSV assembly incorporates a Tidefl ex ® Series 37 Valve and is either welded or fl anged to the overfl ow pipe with tamper-proof bolts. Weir Box Overfl ow Pipe Tidefl ex ® Overfl ow Security Valve (OSV) Tidefl ex ® Primary Overfl ow Protection 10 11 Tidefl ex ® Valve still discharging water at -35° F. TMS Recirculation Pump
3. TIDEFLEX ® MIXING SYSTEM The Science Behind the Simplicity Separating the inlet and outlet pipes will not solve mixing and water quality problems. In almost every case, locating the outlet pipe the furthest distance from the inlet pipe is the wrong place. This will not prevent short-circuiting. A thorough understanding of circulation patterns and mixing is required in order to design a system that will completely mix the tank and eliminate short-circuiting. Computational Fluid Dynamics (CFD) Modeling Continuous CFD modeling allows Red Valve’s engineering team to optimize TMS designs and confi gurations. Tidefl ex ® Technologies has conducted hundreds of CFD models for almost every size and style of storage tanks. Maximize Volume Turnover to Minimize Water Age Tanks are designed to have volume turnover and need turnover to minimize water age. A 5% daily volume turnover = 20 day average water age, 10% turnover = 10 day water age, 20% turnover = 5 day water age, and so on. AWWA recommends 20%-30% turnover for 3-5 day water age. Water utilities should operate their system to maximize tank volume turnover, which will minimize water age, resulting in increased disinfectant residuals, reduced DBPs and better water quality. TMS, a Green Solution to Improve Water Quality Achieves Complete Mixing, Eliminates Short-Circuiting TMS Operating Principal - The TMS is a single multiport manifold system comprised of Tidefl ex ® Inlet Nozzles and Waterfl ex ® Outlet Check Valves that have no mechanical parts and operate solely on differential pressure. While the tank is fi lling, the Waterfl ex ® Valves are closed and the tank fi lls through the Tidefl ex ® Nozzles, which mix the tank completely. During a draw, the Tidefl ex ® Nozzles are closed and water is drawn from the tank through fl ow effi cient Waterfl ex ® Valves. Multiple Variable Orifi ce Tidefl ex ® Nozzles The key to the rapid and complete mixing with the TMS are the multiple Variable Orifi ce Tidefl ex ® Nozzles that produce a minimum of 75% faster mixing than a single fi xed-diameter pipe. In worst case summer conditions (colder inlet water), the multiple Tidefl ex ® Inlet Nozzles have proven to completely mix tanks in comparison to a single inlet where all the fl ow momentum is in one location, resulting in short- circuiting and stratifi cation. Field Validation Through owner- conducted water quality sampling at various locations and depths throughout the tank, the TMS has been validated to achieve complete mixing and improve water quality in chlorinated and chloraminated systems in every tank style. The TMS has also been validated with full-scale tracer studies in a circular reservoir and elevated tank. Custom Designed for Every Tank Red Valve engineers custom design every TMS based on tank style, material, volume, dimensions, fl ow rates and volume turnover. Manifold hydraulics, mixing and water age models are run, as well as a jet trajectory analysis, to determine the quantity, size, orientation, elevation and discharge angles of both the Tidefl ex ® Inlet Nozzles and Waterfl ex ® Outlet Valves. A TMS Design Report is provided and includes TMS drawings, specifi cations, manifold hydraulics and Mixing and Water Age Analysis. The Mixing Analysis shows how much turnover is required to achieve complete mixing. The Water Age Analysis provides the average water age under current or proposed operating conditions. Caution One of the keys to improving water quality in tanks is to ensure that the water is mixed to prevent short-circuiting and dead zones. By design, the distribution system utilizes existing pumps and valves, which then return each tank back to its highwater level. During a fi ll cycle, fresh water passes through multiple Tidefl ex ® Nozzles, which create a circulation pattern throughout the entire water volume. This rapidly and completely mixes new water throughout the tank. Once the tank is mixed during the fi ll cycle, it does not “unmix” during the draw cycle. Unlike mechanical mixers, there is no need to add an additional energy source to mix the water inside the tank. The owner paid for the energy source once when the fi nished water was pumped to fi ll the tank back to its high water level. Adding mechanical mixers is paying for energy twice. Having mixers submerged or fl oating inside the tank also puts an operation and maintenance cost burden on the owner because the motors will need to be replaced every few years, often requiring the tank to be drained. For tanks with minimal or no turnover, mixing 24/7 will not prevent water quality decay, as mechanical mixers just mix continually aging water. TMS is truly a “green” technology! Maximized (Non-Linear) Jet Velocity of Tidefl ex ® Nozzles Provides Rapid Mixing Unlike a fi xed- diameter pipe, Tidefl ex ® Noz zles act as a variable orifi ce. They open and close with increasing and decreasing fl ow, which maximizes jet velocity at all fl ow rates with low headloss, which produces rapid mixing. 4 5 Fill Cycle High Water Level Low Water Level Inlet Physical Scale Modeling Tidefl ex ® Technologies partnered with the Georgia Institute of Technology on a Water Research Foundation (WRF) project called “Physical Modeling of Mixing in Water Storage Tanks.” Hundreds of experiments were conducted on single and multiple port manifolds to analyze mixing characteristics. Various tank styles were modeled under isothermal, negatively buoyant (colder inlet water) and positively buoyant (warmer inlet water) conditions. The TMS designs are based on the most effi cient manifolds discovered in this project. The system has also been validated with independent scale modeling. Volume Turnover Wrong Location of Outlet Pipe Draw Cycle
2. TIDEFLEX ® MIXING SYSTEM The Science Behind the Simplicity Custom Engineered for an Innovative Mixing Solution Benefi ts and Features of TMS: • Extensive CFD and Physical Scale Modeling in every tank style. • Field validated to achieve complete mixing in every tank style. • Tidefl ex ® Variable Orifi ce Nozzles maximize jet velocity, producing rapid mixing. • No external energy source required. • Expected life - 30 years, no maintenance. • Complete custom system design with Mixing Analysis and Water Age Analysis. • Installed in ANY size and style of tank. • Only requires one pipe penetration in tank. • Tidefl ex ® Variable Orifi ce Nozzles and Waterfl ex ® Outlet Check Valves are NSF 61 Certifi ed. • For tanks with common or separate inlet and outlet pipes. • Passive and Active TMS available. Conventional tank design typically incorporates a single fi xed-diameter inlet pipe. This piping confi guration is poor for mixing because it produces low jet velocity and concentrates all of the infl ow momentum in one area of the tank. Infl ow momentum is the energy responsible for mixing. When concentrated all in one place, a single fi xed port will not effectively mix a tank. Problems with water quality are compounded in the summer because the colder water entering the tank is denser and negatively buoyant, causing it to sink. As a result, the water at the bottom of the tank is mixed well, but the water in the upper part of the tank does not mix and gets hotter each consecutive day. This leads to a localized increase in water age inside the tank. Even with an opposing outlet pipe, thermal stratifi cation persists. A fi xed-diameter inlet pipe creates dead zones, short-circuiting, stratifi cation and incomplete mixing, which results in water quality problems. TMS Solves Many Water Quality Problems Including: • Loss of disinfectant residual. • Spikes in disinfection by-products (DBP). • Nitrifi cation in chloraminated systems. • Bacteria and biofi lm growth. • Variations in pH and dissolved oxygen. • Ageing water. • Thermal stratifi cation. • Ice formation. • Taste and odor issues. Limitations of Conventional Tank Design Single fi xed-diameter inlet pipe - low velocity. Inlet fl ow in one location - inhibits mixing. Stratifi ed tank due to single inlet pipe. Since 1953, Red Valve Company has been the trusted global leader in developing innovative, custom-engineered valve products and mixing systems that solve fl ow control problems in both municipal and industrial applications. Our dedication and drive has led us to an unparalleled approach to eliminate short- circuiting, water stagnation, and achieve complete mixing in water storage tanks - the Tidefl ex ® Mixing System (TMS). The key to the TMS is the Tidefl ex ® Check Valve. Developed in the 1980s from a United States EPA grant, the check valve was created to solve backfl ow problems in outfall pipes. Red Valve’s engineering team further expanded the use of the Tidefl ex ® Check Valve by developing it into a Variable Orifi ce Inlet Nozzle that provides superior mixing characteristics when compared to a fi xed-diameter pipe. When used in the TMS, the Tidefl ex ® Variable Orifi ce Nozzles optimize jet velocity at all fl ow rates and discharge an elliptically shaped jet, which produces rapid and complete mixing that improves water quality. The TMS also separates the inlet and outlet with one manifold pipe so short-circuiting is eliminated. Waterfl ex ® Outlet Check Valves (Rubber Membrane, No Mechanical Parts) (Not Required for Tanks With Separate Outlet Pipe) 2 3 Tidefl ex ® Variable Orifi ce Inlet Nozzles (All Rubber, No Mechanical Parts) Not Mixed Mixed
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