Tanks & Structures

Jan. 1, 2003

Tank coatings

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Sherwin-Williams Industrial and Marine Coatings group has many product offerings for the water/wastewater treatment industry, including Tank Clad™ HS, which is certified for tanks 60,000 gallons and larger. Along with meeting the toxicological and extraction test requirements of ANSI/NSF Standard 61, the protective coating complies with EPA standards for VOC emissions. It was developed with low molecular weight polymers capable of greater crosslink density. In addition to requiring less solvent for superior flow and leveling, the polymers produce more chemically and corrosion resistant finishes. Accelerated immersion and disbondment tests revealed that the coatings form strong bonds to numerous substrates, including steel and concrete, and are compatible with both impressed current and galvanic protection systems.

Cleveland, OH
Tel: 800-524-5979
Web: www.sherwin-williams.com

Double-wall tanks

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New, cylindrical double-wall tanks from Assmann Corp. eliminate chemical spills and prevent dome collapse without the expense of lined concrete containment. The company's molding process provides a heavier-top sidewall and dome to prevent dome collapse, while the primary inner tank and a secondary locked-on outer tank ensures against chemical spills. The portable tanks provide a small footprint and are available in sizes ranging from 550 to 6550 US gallons.

Assmann Corp.
Garrett, IN
Tel: 888-357-3181
Web: www.assmann-usa.com

Fiberglass tanks

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To meet the standards of the Chemical Industry, Design Tanks uses two different methods of manufacturing FRP (Fiberglass Reinforced Plastic) tanks. On the smaller diameters, 24 in. through 90 in., the company incorporates the centrifugal cast, spincast method and on the larger tanks, 8 ft. through the new 14 ft. diameter, it uses the chop-hoop filament wound method of fabrication. The tanks feature UV absorbers to eliminate sunlight issues. A freeze protection package is available.

Design Tanks, Inc.
Sioux Falls, SD
Tel: 888-366-8265
Web: www.design-tanks.com

Package treatment

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Hydroxyl Systems has introduced a new line of modular wastewater treatment plants that feature the ability to handle high and variable organic loads in an extremely compact unit. The Hydroxyl-MBS combines a fixed-film biological treatment process complemented with dissolved air flotation for solids removal. Built for highway transport and easy installation, the package treatment plants are fully containerized. They feature automatic controls, no sludge return, stainless steel tankage, and weatherproof construction. Process options including advanced oxidation are available to address specialized wastewater applications including pharmaceutical, food and beverage, chemical, petrochemical, leachate, groundwater, and water re-use.

Hydroxyl Systems Inc.
Sidney, BC
Tel: 250-655-3348
Web: www.hydroxyl.com

Coating proportioner

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The Graco Xtreme™ Mix proportioner overcomes barriers to employing a ratio-accurate proportioner for spraying coatings on tanks and structures in industrial water applications. Smaller and lighter than current plural component systems, it is priced as much as 30 percent less than comparative options. The unit makes proportioning an accessible alternative to hand-mixing. By only mixing the amount of material you need, the proportioner can reduce material waste by up to 25 percent.

Graco Inc.
Minneapolis, MN
Tel: 877-844-7226
Web: www.graco.com

Custom tanks, vessels

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Ershigs, a Plasticon Fluid Systems company, specializes in site-fabricated seamless custom tanks and vessels up to 100 feet or more in diameter. Using fiberglass-reinforced plastic, these structures can be constructed with double-wall and double-bottom configurations. The company manufactures not only vessels for storage and processing, but also duct systems, valves, process and effluent piping, washer and ventilation hoods, stacks and chimney liners, scrubbers, and spray header piping and assemblies. It also provides mobile manufacturing units for on-site construction and field crews for maintenance.

Bellingham, WA
Tel: 360-733-2620
Web: www.ershigs.com

Progressing cavity pump

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The Moyno® 2000 Progressing Cavity Pump is designed for use in a variety of digester, sludge and conditioning tank transfer applications. The pump's rugged construction makes it ideal for abrasive applications such as waste activated sludge and lime slurry. In addition, the low-shear action of the pump allows it to handle polymers and other shear-sensitive fluids.

Moyno, Inc.
Springfield, OH
Tel: 877-486-6966
Web: www.moyno.com

Tank covers

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GTI's new cover system allows tanks to be securely covered while providing access to the tank's internal components. Ideal for clarifiers, chlorine contact basins, sedimentation tanks, aeration basins, etc., the covers contain odors, capture VOCs, eliminate sunlight penetration, and prevent splashing. The system is a high performance reinforced membrane cover supported on a low-profile aluminum arch frame. The UV protected membrane cover is gas tight, but can be quickly detached and rolled up along the frame. This gives operators access to inspect and maintain internal components. The arch frames can also be removed for complete access to the tank. Optional hatches allow access to valve operators, etc. without retracting the cover. Off-gas removal piping connects directly to the cover system.

Geomembrane Technologies Inc.
Fredericton, NB
Tel: 506-452-7304
Web: www.gti.ca

Check valves

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For years, the Tideflex® Check Valve has been used on the ends of reservoir overflow pipes to prevent birds, rodents and insects from entering through the pipes and contaminating the water supply. Now, this same technology is being used to protect water from human tampering. Unlike flapgates and metal screens, which can simply be lifted open by bare hands, the Tideflex valve is extremely difficult to open from the outside. For tighter security, the company offers the Tideflex® InLine Check Valve, which is installed inside the pipeline and cannot be accessed or even seen from outside of the tank.

Red Valve Co. Inc.
Carnegie, PA
Tel: 412-279-0044
Web: www.redvalve.com

Above ground tanks

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Matrix Service Co. is a fabricator and erector of above ground storage tanks as well as shop built tanks. The company primarily serves the petroleum industry, but also provides clarifiers for wastewater treatment and tanks for the storage of many other products. The nationwide company stocks large amounts of plate and structurals for rapid turn around times.

Matrix Service Co.
Bristol, PA
Tel: 215-946-9327
Web: www.matrixservice.com

Water storage tanks

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Preload Inc. has completed the construction of two 7.5 MG water storage tanks for the City of Oneida, NY. The tanks measure 226 ft. ID x 25 ft. SWD and incorporate an unsupported or clear span dome roof. Built to the AWWA D-110, Type 3 Standard for circular wire-wound prestressed-concrete water tanks, the walls are always in compression despite varying internal hydrostatic loads. This results in a very long service life with no routine maintenance or repainting.

Preload Inc.
Hauppauge, NY
Tel: 888-773-5623
Web: www.preload.com

Tank mixing

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The JetMix Vortex Mixing System offered by Liquid Dynamics Corp. is designed to provide high efficiency mixing of liquids and suspended solids in large storage tank applications. The mixing system is ideal for a wide range of industrial tank mixing applications, including mixing of sludge and biosolids. The simplicity of the system ensures low maintenance and permits intermittent operation on an as needed basis. A pair of floor-mounted nozzles can be rotated 360 degrees, creating a toroidal flow pattern so unique that it is patented.

Liquid Dynamics Corp.
St Charles, IL
Tel: 630-513-8366
Web: www.jetmix.com

Package treatment

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The Addigest® system from Smith & Loveless offers industrial facilities a complete, pre-engineered wastewater treatment system with multiple process capabilities. Available in either a factory-built or pre-fabricated, field-erected model, the system is designed to handle high-strength industrial waste streams, including two-stage aeration with dual clarifiers. In addition, the package plants provide add-on capabilities for flow equalization, sludge storage, nutrient removal, disinfection and other options.

Smith & Loveless Inc.
Lenexa, KS
Tel: 913-888-5201
Web: www.smithandloveless.com

Storage tanks

CB&I's Strata-Therm® tanks simultaneously store water for both fire protection service and for electrical demand side management (DSM) of large air-conditioning chilled water systems. The tank remains full of water and employs buoyant thermal stratification to store colder, denser, system supply water below warmer, lighter, system return water. The tank can meet fire prevention standards such as NFPA 22 and typical certification agency requirements.

Chicago Bridge & Iron Co. (CB&I)
The Woodlands, TX
Tel: 281-774-2200
Web: www.chicagobridge.com

Pressure relief valves

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Trumbull Tank Pressure Relief Valves are designed for use in preventing large empty tanks from floating due to an excess of groundwater beneath them. When this condition occurs, the hydrostatic pressure will open the cover of the valve allowing water to enter, thereby equalizing pressure inside and outside the tank and preventing it from floating. Designed for low seating or unseating pressure applications only, they will start to open at less than one foot of head. Floor Type pressure relief valves are cast in the bottom of tanks, while the Wall Type has a flanged base with ANSI 125# STD drilling for use with a wallpipe.

Trumbull Industries
Youngstown, OH
Tel: 330-799-3333
Web: www.trumbull-mfg.com

Tank security

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Pittsburg Tank & Tower Co. has added bolted steel storage tanks and tank site security systems to its line of products and services. The company's bolted tanks are available in either low-alloy, high-strength carbon or type 304 stainless steel, and are available with galvanized, epoxy paint, powder coat, or glass-fused-to-steel coatings.

Pittsburg Tank & Tower Co.
Henderson, KY
Tel: 270-826-9000
Web: www.watertank.com

Odor containment covers

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Vapor Guard® odor containment covers from ILC Dover are shown installed on two 20 x 100 ft. aeration/EQ tanks at the Exeter Township WWTP in Birdsboro, PA. Installed to contain possible odorous emissions from the tanks, the structural-fabric covers were selected over competing aluminum and fiberglass covers. The covers offers long-term odor containment, removable modular cover sections for tank maintenance, access hatches for observation and sampling, and a flat profile for minimum emission control costs.

ILC Dover Inc
Frederica, DE
Tel: 800-631-9567
Web: www.ilcdover.com

Storage tanks

TolPlast Co. provides a wide range of polyethylene and fiberglass storage tanks. Polyethylene tanks are available in capacities to 16,000 gallons; fiberglass capacities are available to 30,000 gallons. The company also offers the captor containment system, a double-wall storage tank system that provides maximum containment security and safety. Eleven different captor sizes are offered ranging from 1,100 gallon to 6,500 gallon capacities.

Tolplast Company, Inc.
Lacey's Spring, AL
Tel: 256-498-3698
Web: www.tolplast.com

Paint Removal

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Just as coatings have improved over the years, so has the coatings removal process. Floran Optio represents the future in coatings removal. Unlike conventional strippers, Optio penetrates each paint layer virtually lifting them from the substrate. Compared to sandblasting, the system requires minimal downtime and is economical. No airborne contaminants means no costly containment systems. The product can be used in tight quarters and on tanks, filters, clarifiers, and more.

Floran Technologies
Oklahoma City, OK
Tel: 405-631-1106
Web: www.florantechnologies.com

Plastic tanks

Chem-Tainer Industries offers vertical bulk storage tanks in sizes from 5 to 15,000 gallons. The tanks are manufactured from linear polyethylene in one piece, seamless construction. The tank series is designed for either indoor or outdoor applications. The tanks are translucent for convenient product level viewing. A flat bottom design provides for efficient installation. Hundreds of styles are available to choose from.

Chem-Tainer Industries
West Babylon, NY
Tel: 631-661-8300
Web: www.chemtainer.com

Subsurface water storage

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Invisible Structures has introduced Rainstore3, a new class of subsurface water storage created to fill a storage niche between structural tanks and reservoirs and buried pipe and arch systems. The system features thin-walled cylindrical columns of injection molded resins made from recycled high impact polypropylene (HIPP), or high density polyethylene (HDPE) plastics. The storage system can be as shallow as 4 in. or as deep as 98 in. Length and width in 40 in. increments allow for modular design flexibility.

Invisible Structures, Inc.
Aurora, CO
Tel: 800-233-1510
Web: www.invisiblestructures.com

Wet well cleaning

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The Gamajet EZ8 Tank Cleaner eliminates the need for personnel to enter wet wells or other storage tanks for cleaning purposes. By simply inserting the cleaning unit into the well, its 360 degree fluid-driven impingement cleaning pattern will completely scour the inside. The unit provides high flow capacities in a light and narrow unit that allows for maneuverability. Wet wells can be cleaned in as little as 10 minutes.

Gamajet Cleaning Systems, Inc.
Devault, PA
Tel: 610-408-9940
Web: www.gamajet.com

Launder covers

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Warminster Fiberglass Co. provides custom molded or reinforced fiberglass products, including launder covers for primary clarifiers. Approximately 98 to 99% of odors generated in primary clarifiers are created as the water flows over the weirs and into the effluent trough. The primary function of the launder cover is to contain those gases. A secondary function is to form a ductwork system. Placing one inlet duct and one exhaust duct 180 degrees apart allows evacuation of all gases without leaving any dead air spaces. In circular clarifiers, the covers feature a flow equalization baffle at the inlet to insure the incoming air is distributed equally around each half.

Warminster Fiberglass Co.
Southampton, PA
Tel: 215-953-1260
Web: www.warminsterfiberglass.com

Bolted steel tanks

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The Porta Tank™ system combines the durability of bolted steel walls with the chemical resistance of high performance composite membrane liners. The patented design incorporates a high tech synthetic buffer material that prevents damage to the liner by isolating it from irregular surfaces on the tank walls and foundation, limiting the need for a costly concrete foundation. Sizes range from 6,500 to 1.5 million gallons.

Environetics, Inc.
Lockport, IL
Tel: 815-838-8331
Web: www.environeticsinc.com

Tank bolts, nuts

Tank Products Co. provides a line of API tank bolts and nuts in 3/8 in. and 1/2 in. diameters with lengths from 1 to 2 1/2 in. These fasteners are available in several different finishes, including unplated or black, hot-dipped galvanized, mechanical galvanized and dichromate dipped. The tank bolts exceed the minimum strength requirements by substantial margins. The company also offers encapsulated nuts of extra strength, heat resistant plastic. The nuts are totally sealed when in place. They are designed to prevent deterioration and toxicity and are made with NSF-61 approved plastic. The company's bonded washers are rubber-backed to prevent scratching of painted or galvanized materials.

Tank Products, Inc.
Ontario, CA
Tel: 909-923-3188
Web: www.tankproducts.com

Tanks covers

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Ultraflote Corp. designs, manufactures and installs aluminum covers for the water and wastewater industry. Its Ultradome™ roof is custom engineered for specific design requirements. The self-supporting dome allows for maximum overhead space and provides interference-free operation for equipment. The Quad-Seal™ flat cover, for both rectangular and round tanks, consists of individual, interlocking panels made up of reinforced extruded aluminum planks. The company's Geotruss™ is ideal for rectangular and square structures that require overhead room and access.

Ultraflote Corp.
Houston, TX
Tel: 713-461-2100
Web: www.ultraflote.com

Flexible spill berm

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The new low profile Ultra-SpillBerm from UltraTech contains leaks and reduces OSHA slip hazards. Made of non-absorbing polyurethane, the 10-foot sections will bend to follow any curve or angle needed. Applications include: containing oil leaks from machinery and equipment, diverting stormwater, sealing areas during washdown, and spill response. Interlocking end joints allow multiple units to be connected together.

UltraTech International Inc.
Jacksonville, FL
Tel: 800-353-1611
Web: spillcontainment.com

Prestressed concrete tanks

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DYK offers prestressed concrete liquid storage tanks. The company has extensive expertise in the design, prestressing and construction of above ground and buried water and wastewater storage tanks. The company has constructed tanks ranging in capacity from 100,000 gallons to 33 million gallons in well-known municipal and private facilities worldwide.

DYK Incorporated
El Cajon, CA
Tel: 800-227-8181
Web: www.dyk.com

Access doors

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Bilco's single- and double-leaf model J-AL aluminum access doors are engineered for smooth operation, corrosion resistance and low maintenance. A variety of lock options are available for the doors to add security and prevent unauthorized access to underground areas. Standard options include keyed cylinder locks, recessed padlock hasps, and security cover plugs.

Bilco Inc.
New Haven, CT
Tel: 203-934-6363
Web: www.bilco.com

Modular bladder tank

The new LiquiGard containment system introduced by ModuTank combines the advantages of bladders and steel tanks. Modular steel walls protect fitted bladders, support internal secondary containment liners, and provide extra strength against hydraulic stress. Available capacities range from 1500 to 250,000 gallons, and heights from 3 ft. 6 in. to 14 ft. 6 in. The tanks can be used in indoor or outdoor installations.

ModuTank Inc.
Long Island City, NY
Tel: 718-392-1112

Tank, container scales

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Eagle Microsystems offers electronic, load cell type scales. Its LP4300 Precision Low Profile Platform Scale system can be used for weighing containers and tanks weighing up to 20,000 lbs. with platforms up to 72" x 72" x 3" high. The scale uses four sealed stainless steel load cells to weigh either liquids or dry materials with an accuracy of ± 0.1% of full scale. The rugged design permits a safe load up to 200% of rated capacity. In conjunction with the EI-1000 high resolution indicator/transmitter, the system provide direct digital readout as well as sophisticated computations such as amount used, amount remaining, total weight, gross weight and "rate by weight."

Eagle Microsystems, Inc.
Pottstown, PA
Tel: 610-323-2250
Web: www.eaglemicrosystems.com