NS7, nozzle, counterflow nozzle, counter flow nozzle

Highlights:

• Available in two sizes
• Easily removed for cleaning
• No moving parts
• Wide range of adjustments in water flow rate

Related Information:

• Brochure

The Marley NS7 counterflow nozzle is an injection molded polypropylene unit consisting of two parts—the main assembly with integral turbulator and an EDPM rubber grommet. NS7 nozzles are designed to economically provide desired thermal performance at low spray heights typical of factory assembled cooling towers.

NS7 nozzles are produced in two sizes. The NS7-150 has a nominal insert OD of 1.5” and the NS7-200 has a nominal insert OD of 2”. Recommended spray height above the fill is between 7” and 15”.

MC120S, counterflow, film fill,

Highlights:

• High-performance design
• Bottom supported
• Requires minimum number of supports
• Log configuration
• Ideal replacement for Marley MC47 counterflow fill and competitive products with similar fill sheet spacing

Related Information:

• Brochure

Marley MC120 is a high performance film fill system designed for factory-assembled counterflow towers where 12” air travel height logs and a 1⁄2” offset in length of adjacent sheets (staggered bottom) are required.

Textured crossed corrugations provide the surface area and turbulence to develop efficient heat transfer. The corrugations inherently establish uniform fill sheet spacing at 0.45”.

Log packs are nominally 12” in air travel height and 12” deep. Normal pack length is 72” but pack are available up to 120”. Maximum air travel height is 72”.

Packs have a 1⁄2” staggered edge on the air inlet side of the pack that enhances performance and air distribution.

sprag clutch, sprag clutch backstop, anti-rotation device,

Highlights:

• Utilizes lift-off sprag functionality
• Replaces pinion cage cap on Geareducer
• Allow backstop to be lubricated from the Geareducer oil supply
• Protects the lip seal
• Epoxy painted
• Capable of continuous overrunning at 1800 rpm

Related Information:

• Sprag Clutch Backstop Brochure

The Marley® integral Sprag Clutch Backstop is custom designed and configured specifically for a Marley Geareducer® with input shaft diameters of 2.375” and 2.625”. Also referred to as a sprag clutch anti-rotation device, these units are designed to prevent reverse rotation of the fan, Geareducer and motor. Designed specifically for use with the current 32.2, 3400 and 4000 Geareducer models, they can also be utilized to fit legacy 32.1T, 34.3T, 34.4, 36 and 38 Geareducer models.

When operating, the outer race is stationary and the inner race is rotating. When facing the input shaft of the Geareducer, the forward (over-running) direction is clockwise.

In contrast to conventional sprag clutch devices which may continuously wear, this device utilizes a “Lift-off” sprag functionality which alleviates the wear issue once typical rotation speeds are reached.
This feature greatly diminishes the friction and heat generated, thus promoting longevity for both the clutch unit and the Geareducer itself.

Highlights:

• Quiet operation
• No axial separation of hubs
• Corrosion resistant materials and coatings
• Simple to install
• Balancing not required at 1800 rpm
• Fast and easy flexible element replacement
• Accommodates misalignment in the angular and parallel directions as well as end float
• Made in USA

Related Information:

• SofTork Coupling Brochure

The Marley SofTork™ MC Close Coupling is a flexible element, tire type coupling designed specifically for cooling tower applications. Couplilngs consist of two cast ductile-iron, electro-galvanized hubs and clamp rings with stainless steel fasteners. The SofTork coupling has outstanding vibration dampening characteristics. The shock load cushioning is ideal for variable frequency drive applications and has a high degree of flexibility to accommodate misalignment.

Permagrid, Ceramic, Tile fill, Tile

Highlights:

• Extremely durable
• High temperature capability
• Maintenance free
• Extreme freeze-thaw capability

Related Information:

• Brochure

Ceramic™ Permagrid tile fill is the most durable fill in the industry with a guaranteed minimum of 25 years of service. Molded from domestic clay to strict specifications, the clay is heat fired to create a fill that is immune to traditional fill deterioration problems. This tile fill exhibits low water absorption such that it will withstand extreme freeze-thaw environments common in cold weather climates or free-cooling applications.

Characterized by large openings, Permagrid tile is an excellent performer in the high-solid contents environment of dirty water applications. Permagrid is set without mortar, adhesive or mechanical connections so no regular maintenance is necessary. The installed system is placed in a pattern designed to provide optimal thermal performance.

MVC20, low-clog, anti-fouling

Highlights:

• Vertical-flute film fill
• Low maintenance
• Low clog design
• Low pressure drop

Related Information:

• Brochure

Marley’s MVC20™ anti-fouling film type fill consists of thermoformed corrugated sheets made of rigid polyvinyl chloride (PVC), impervious to decay, fungus and biological attack. The sheets are bonded to form modules which can be dimensioned to fit any application.

MVC20 fill combines properties related to a media’s ability to allow substances to migrate through it, while maintaining thermal efficiency— this then allows for the use of film fill where fouling risks occur.

Each module consists of vertically channeled flat and corrugated surfaces, which essentially avoids contact between the sheets, thus eliminating water concentration. The horizontal corrugations and their location within the sheet promote optimum mixing of air and water. The flutes in the MVC20 fill are vertically and aerodynamically shaped resulting in a reduction of pressure drop.

Highlights:

• Outstanding durability
• Designed specifically for cooling tower duty
• Stainless steel or Carbon Fiber tube
• Stainless hardware standard
• Factory balanced
• Lengths up to 15' (4.6m)

Related Information:

• Series 400 Driveshaft Brochure

The driveshaft transmits power from the output shaft of the motor to the input shaft of the Geareducer. Because the driveshaft operates within the tower, it must be highly corrosion resistant. Turning at full motor speed, it must be well balanced—and capable of being re-balanced. Transmitting full motor power over significant distances, it must accept tremendous torque without deformation. Subjected to long term cyclical operation, and occasional human error, it must be capable of accepting some degree of misalignment.

Driveshafts are described as “floating” shafts, equipped with flexible couplings at both ends. Shafts are fabricated of tubular stainless steel or carbon fiber. The yokes and flanges which connect to the motor and geareducer shafts are HDG steel or stainless steel.

It is very important that driveshafts be properly balanced.  Imbalance not only causes tower vibration, but also induces higher loads and excessive wear on the mechanical equipment coupled to the shaft. Most cooling tower driveshafts operate at speeds approaching 1800 rpm. At these speeds, it is necessary that the shafts be dynamically balanced to reduce vibrational forces to a minimum.

Highlights:

• Significant performance increase
• Patented
• Reuse existing splash fill and grids
• No increase in footprint

Related Information:

• Brochure

Strategically locating high-performance film fill modules within your crossflow splash fill cooling tower can significantly upgrade the thermal performance without costly structural and mechanical equipment modifications.
 
Marley Flash Fill combines modules of PVC film fill with splash fill to optimize the thermal performance of your cooling tower. Film fill modules are installed in a staggered pattern from the hot water distribution basin at the air inlet face descending diagonally to the eliminator face at the cold water collection basin. This configuration utilizes the excellent heat transfer efficiency of film fill while maintaining a pressure drop that is only incrementally higher than a typical splash fill configuration.

This patented design enables us to offer the cooling tower owner significant performance improvement without a change in tower plan area, plus the potential reuse of the existing splash fill and grids. Marley construction crews can even install Flash Fill on-the-fly one cell at a time.

Highlights:

• High performance
• Heavy duty
• Easy cleaning
• Direct replacement for wood lathe and ACB fill

Related Information:

• Brochure

Mesa splash-fill bar advances the state of the art in cooling tower splash fill.

The enhanced thermal performance of Mesa fill increases cooling tower capacity in most cases. Variable fill bar spacings provide the required thermal performance with the minimal fill material and installation time.

Mesa fill is installed parallel or perpendicular to the air flow depending on thermal performance requirements or existing cooling tower configuration.

Mesa fill bars are extruded of corrosion resistant PVC. The unique material formula used in the Mesa bar meets or exceeds CTI Standard 136 for strength, flammability and impact. Each bar is firmly attached to the Marley GridLoc polypropylene injection-molded support for use in crossflow towers. GridLoc provides a nonabrasive support that eliminates the need for bench supports.

Highlights:

• High Performance
• Bottom supported fill design
• Integral louvers
• Integral triple-pass eliminators

Related Information:

• Brochure
• SPX Profile

Marley MBX fill is a high performing, bottom supported PVC pack fill with integral louvers and drift eliminators, specifically designed for the Aftermarket.

This fill will make installation easier and faster, while at the same time offering great cooling efficiency without major tower modifications.

MBX fill incorporates highly efficient cellular drift eliminators, integrally molded within the fill sheets. These eliminators may reduce drift emissions from the tower by a factor of 10 or more.

Louvers are also integrally molded within the fill sheets preventing water from escaping and ensuring precise air distribution throughout wide variations in airflow.

MBX fill packs are available in various heights and air travels from 24 inches to 48 inches and can be installed in almost any crossflow cooling tower regardless of tower age or manfacturer. Retrofit kits including MBX fill packs, fiberglass supports, stainless steel hardware and installation instructions are available.

Highlights:

• True "twisted" deep airfoil design
• Fiberglass reinforced vinyl ester laminate
• Single piece construction
• Heavy duty dual-plate heavy galvanized steel hub assembly
• 240" through 394" (10 meter) diameter
• Stainless steel hardware standard

Related Information:

• Brochure
• Brochure

Marley HP7000 fans are designed specifically for industrial cooling tower applications, offering distinct advantages over other types of fans. The Marley Flare Tip™ blade enhancement provides increased performance overcoming tip clearance losses, aiding the movement of air next to the fan cylinder.

The wide blade design is well suited for low noise operation, delivering superior air flow and pressure capability at reduced speed.

The skin of the HP7000 is made with top-quality fiberglass reinforced vinyl ester that is infused with pigment for even distribution across the laminate. There are multiple layers of surface veil on the blade surface leading to superior UV protection compared to fans with only a painted exterior.

Constructed in one continuous piece, with a consistent moment weight, HP7000 blades are interchangeable without the need to rebalance the fan assembly. A nylon leading edge erosion barrier is molded into each blade to ensure long service.

The hollow blade is designed with a deep section airfoil making the HP7000 strong, yet light and easy to handle.

Highlights:

• True "twisted" airfoil design
• Fiberglass reinforced vinyl ester laminate
• Single piece construction
• Heavy duty steel hub assembly
• 120" through 240" diameter
• Stainless steel hardware standard

Related Information:

• Brochure

Marley HP7i fans are designed specifically for cooling tower applications, offering distinct advantages over other types of fans. The Marley Flare Tip™ blade enhanced for low noise operation, delivering maximum air flow an pressure capability at reduced speed.

The HP7i blade is a single piece composite design ensuring structural integrity. Fan blades with bolted or glued connections between the blade shank and airfoil section introduce an additional mechanical joint under stress. The one piece composite design ensures the integrally molded leading-edge will not come off or fail and the blade will handle the toughest cooling tower applications.

Blades attach to the fan hub using a heavy-galvanized iron ring integrally molded with each fan blade. By loosening the hub attachment hardware, blades can easily be rotated to achieve desired pitch, permitting maximum utilization of fan horsepower.

Highlights:

• True airfoil "quiet" design
• Solid cast aluminum alloy
• Infinite pitch adjustment
• Machined aluminum hub
• 66" through 168" diameter
• Stainless steel hardware standard

All Marley NC Class cooling towers are designed for low sound levels using high blade-count, wide-chord C fans for maximum efficiency at low tip speeds. All C fan assemblies incorporate machined aluminum hubs with stainless steel hardware.

All C fan blades are adjustable in pitch, to take full advantage of rated horsepower or to compensate for unusual job site restrictions. U-style hub C fans are available from 120” through 168” diameters and adjustable-hub C fans are available from 66” through 144” diameters.

C fan blades can be replaced without rebalancing the entire fan.

Highlights:

• True "twisted" airfoil design
• Solid cast aluminum alloy
• Infinite pitch adjustment
• Machined aluminum hub
• 54" through 216" diameter
• Stainless steel hardware standard

Marley H3 cast aluminum alloy fans are standard equipment on various Marley product lines. All H3 fan assemblies incorporate machined aluminum hubs with stainless steel hardware. All H3 fans blades are adjustable in pitch, to take full advantage of rated horsepower or to compensate for unusual job site restrictions.

A true airfoil blade, designed specifically for cooling towers offering efficient quiet operation and long service life. Available in 54” through 216” fan diameters.

gearreducer, gearbox, gear-box, gear bearings, lubrication, gearlube, gear-lube, reducer

Highlights:

• Outstanding durability
• Designed specifically for cooling tower duty
• Designed to meet or exceed the requirements of CTI Std. 111 and AGMA standards
• Minimum L10A service life of 100,000 hours on both input and output shafts
• Long-life lip-type oil seal at input shaft
• Output shaft sealed with a maintenance-free labyrinth ring
• Timken tapered roller bearings
• Two-stage (spiral bevel/helical) gear reduction for efficient power transmission

Related Information:

• Brochure
• Brochure
• SPX Profile

Marley industrial Geareducers are manufactured and designed specifically for cooling towers in large industrial and power plant applications. In shape and function, their design goes beyond normal AGMA requirements—both to maximize air movement through the tower, and to minimize the impact of maintenance.

Although the primary function of a Geareducer is to reduce the speed of the driver (usually an electric motor) to a speed which is conducive to good fan performance, it must satisfy other criteria as well. For example, it must provide primary support for the fan — withstand the shock loads imposed at start-up and during subsequent speed changes—anchor the fan against lateral movement in response to rotational forces—and contribute as little as possible to power transmission losses as well as the generation of noise.

Given these requirements, many manufacturers of mechanical equipment provide acceptable speed reducers. Designed for more forgiving commercial applications, these units are often unprepared for the rigors and peculiarities of cooling tower service, such as the corrosive effects of operation (often intermittent) within an exceedingly humid environment. As a result, both the life expectancy of these commercial speed reducers— and the thermal performance of the cooling towers on which they are installed often suffer.

Marley is the only major manufacturer whose Geareducers are designed uniquely for cooling tower service. And, since we warrant not only the Geareducer, but the thermal performance of the cooling towers on which they operate as well, development, design, and manufacture are taken very seriously. This has resulted in an unequalled history of trouble-free operation.

gearreducer, gearbox, gear-box, gear bearings, lubrication, gearlube, gear-lube, reducer

Highlights:

• Outstanding durability
• Designed specifically for cooling tower duty
• 5 year oil change interval
• Minimum L10A service life of
• 100,000 hours on both input and output shafts
• Long-life lip-type oil seal at input shaft
• Output shaft sealed with a maintenance-free labyrinth ring
• Timken tapered roller bearings

Related Information:

• System 5 Brochure
• Brochure
• SPX Profile
• Marley Difference

For over 40 years, Marley has been making the most reliable geared speed reducers—designed specifically for cooling tower service.

The reliability of the Geareducer comes from more than 100,000 units of experience, and from Marley’s attention to exacting quality standards of design and manufacturing. Today, every Marley Geareducer is tested under load at our factory. Then, it’s inspected and adjusted before shipment.

Marley has always known that outstanding Geareducer engineering is only as good as the lubricant that protects it. That’s why we took the next step and filled every System 5 Geareducer with Marley Gearlube™ lubricant.

In addition, Marley has made several improvements in the System 5 Geareducer to take advantage of the extraordinary lubricating properties of Gearlube. The new 1800, 2000, 2200 and 2400 Geareducer models will utilize a long-life lip-type oil seal at input shaft for extended service life.

We’ve equipped it with a magnet in the sump to trap metal particles generated during initial break-in period.

Highlights:

• Cellular design
• Low pressure drop
• Very low drift rates
• Counterflow and crossflow designs

Related Information:

• Brochure
• ServiceInfo

Marley developed the first cellular drift eliminator in the 1970s when eliminator designs were primarily ineffective blade type configurations. Marley patented the XCEL® generation of eliminators in the early 80s. No other eliminator could come close to XCEL eliminator’s low drift rate and low pressure drop.

Now, virtually every eliminator is a nesting cellular PVC type design. XCELplus is a more advanced design that meets or exceeds today’s demanding specifications for drift emissions without sacrificing fan horsepower. Now drift rates are reduced to half of the original XCEL with equivalent pressure drop.

The eliminator discharge angle is important enough to warrant two separate eliminator designs—one for crossflow and one for counterflow towers. Tests show the air direction leaving the eliminator is extremely important—imperfect designs create additional work for the fan.

This means either increased fan horsepower—or reduced cooling tower performance. The crossflow version features drainage slots within the eliminator pack to insure trapped drift is returned to the wet side of the cooling tower.

Low drift rate is the primary goal of eliminator design. XCELplus boasts typical drift rates of .001% of the total GPM. Lower drift rates are available depending upon tower configuration.

XCEL eliminators require little or no maintenance. If it becomes necessary to clean them, care must be taken not to physically damage the PVC eliminator packs. For loose deposits of silt, fibers, etc., a water spray can be used, provided the spray nozzle is kept moving continually and the water pressure is not excessive (recommend less than 30 psi).

Related Information:

• Brochure

GridLoc splash-fill support is a polypropylene injection molded support for use in crossflow towers. The GridLoc design has a pair of integral, opposing, downward sloping splash bar grips attached to the vertical strands in each window to secure splash bars. The lower horizontal strand has a short pair of vertical nubs to center splash bars and provide a nonabrasive support that eliminates the need for bench supports.

The GridLoc design has a molded in shelf support at the top of the grid for attaching the grid to the structural members. The grid can be either nailed or screwed to the support member to avoid movement of the grid in the horizontal plane.

The typical GridLoc arrangement will be in 4’ x 6’ bays with bars parallel to air flow. The nominal window opening for bar spacing is 4” horizontal by 8” vertical. The GridLoc splash bar grips are compatible with many Marley splash bar designs as well as commercially available bars. GridLoc will retrofit on historic Marley towers.

trickle tricklebloc trickleblock

Highlights:

• High Performance
• High density counterflow design
• Withstands foot traffic
• Unique extruded heat-fused polypropylene design

Related Information:

• Brochure

Marley’s patented TrickleBloc clog-resistant splash fill is comprised of extruded polypropylene cylinders, heat-fused to form blocks of splash media. The open weave of the vertical cylinders provides even water flow and promotes thermal efficiency. The lattice design promotes splashing to help facilitate self-cleaning.

Highlights:

• High Performance
• Perpendicular and Parallel configurations
• Easy cleaning
• Exceeds CTI Standard 136 for strength, flammability and impact

Related Information:

Omega splash fill bar advances the state of the art in cooling tower splash fill.

Enhanced thermal performance of Omega fill increases cooling tower capacity in most all cases. Variable fill bar spacings provide the required thermal performance with the minimum amount of fill material and installation time. Omega fill is installed parallel or perpendicular to the air flow depending on thermal performance requirements or existing cooling tower configuration.

Omega fill bars are extruded of corrosion resistant PVC (polyvinyl chloride) manufactured by Marley’s plastics facility. The unique material formula used in the Omega bar meets or exceeds CTI Standard 136 for strength, flammability and impact. Each bar is firmly attached to FRP or stainless steel fill grids with unique injected molded polypropylene benches designed to prevent premature wear on the fill bar and the grid.

Omega bar’s classic arch shape enhances structural characteristics which prevents sagging, even after prolonged exposure to cooling tower environments.

Omega fill and its support system are designed to be used in virtually all cooling towers regardless of a cooling tower’s age or manufacturer.

Highlights:

• High Performance
• High temperature capability
• Variable spacing
• Unique injection molded polypropylene design

Related Information:

• Brochure

The ladder fill configuration provides highly efficient water breakup to develop excellent heat transfer with low resistance to airflow. The horizontal spacing between ladders is variable to meet thermal performance requirements.

Injection molded polypropylene Ladder fill is extremely inert to chemical reaction.

Ladder fill is capable of 150°°F water temperature operation.

Ladder fill can be installed in virtually any crossflow cooling tower regardless of its age or manufacturer.

Highlights:

• High performance
• Heavy duty
• Easy cleaning
• Direct replacement for wood lathe and ACB fill

Related Information:

• Brochure

Alpha III fill (also knows as Alpha III Wing Foot) will increase cooling tower thermal performance capacity vs. wood lath in industrial towers.  Variable fill bar spacing is available to provide the required thermal performance.

Alpha III fill bars are corrosion resistant PVC extrusions which are supported by FRP (fiberglass reinforced polyester) grids.

FRP fill grids are extremely inert and tough. Each fill bar is firmly attached to the FRP grid to prevent premature wear on either the grid or the fill bars. The fill bars are designed to prevent sagging, even after prolonged exposure to a cooling tower environment.

Alpha III is a direct replacement for many types of wood lath and ACB fill. The FRP grid can be manufactured to fit virtually any cooling tower regardless of its age or manufacturer.

The rounded upper surface of the fill bars and the smooth surface finish facilitate cleaning.

Highlights:

• High Performance
• Bottom supported fill design
• Integral triple-pass eliminators
• Available with or without eliminators
• Easily installed as a replacement fill in non-Marley products

Related Information:

• Brochure

M106 is a film-type, bottom-supported cooling tower fill. Water flowing down the fill sheets forms a thin film on the surface of the sheets. This type of fill provides much more water surface exposure per cubic foot than does splash-type fill.

This fill offers greater cooling efficiency, which translates to colder water from present systems without an increase in fan horsepower. Or, this improved efficiency can be used to save horsepower and produce the same cold water temperature.

M-106 fill is also available with highly efficient drift eliminators molded right into the fill sheets. Compared with older designs, these eliminators reduce water carryover (drift) from the tower by a factor of ten or more! Reduced drift means lower water and treatment chemical costs.

The nuisance of spotting adjacent buildings and property due to cooling tower drift is virtually eliminated. Options include eliminators for both vertical and horizontal discharge cooling towers. Guiding the discharge air in the right direction further increases savings in fan horsepower.

M-106 is thermoformed from PVC sheets with a maximum flame spread rating of 25 per ASTM E-84. Therefore, the risk of fire damage is minimal.

M106 fill is impervious to rot, corrosion, and decay. The wide sheet spacing prevents clogging ensuring minimal maintenance and long service life.

M-106 is easy and inexpensive to install in almost all crossflow cooling towers. It requires minimal structural modification because it is bottom supported. The integral drift eliminators don’t need extra frames or retainers. M-106 provides more cooling capacity and improved drift elimination in one easily installed pack.

Highlights:

• High Performance
• Hanging fill design
• Integral louvers
• Integral triple-pass eliminators

Related Information:

• MX625 Brochure
• MX75 Brochure

MX Fill is available in MX75 configuration and higher-performing MX625 configuration. MX is a hanging film type cooling tower fill which spreads the water into a thin film, flowing over large vertical surfaces, promoting maximum exposure to air flow. This type of fill provides much more water surface exposure per cubic foot than splash type fill.

MX fill incorporates highly efficient cellular drift eliminators, integrally molded within the fill sheets. Compared with previous designs, these eliminators reduce drift emissions from the tower by a factor of ten or more! Less drift means tower owners save water bills and water treatment chemical expenses.

This fill virtually eliminates the nuisance caused by drift spotting on adjacent buildings and property. For additional savings, the drift eliminators discharge air directly toward the fan. Discharge air, traveling in the right direction when it leaves the eliminators, translates to lower fan horsepower.

Louvers are also integrally molded within the fill sheets preventing water from escaping and assuring precise air distribution throughout wide variations in airflow. Unlike towers equipped with separate external louvers, this fill operates virtually ice-free even in extremely cold weather.

MX fill is thermoformed from PVC with a flame spread rating less than 25 per ASTM E-84 and is considered selfextinguishing. Therefore, the risk of fire damage is minimal.

Highlights:

• Vertical-flute film fill
• Hanging or bottom support design
• Efficient thermal performance
• Low maintenance
• Low clog design

Related Information:

• Brochure

MCR is a film fill system designed to significantly reduce the risk of biological fouling while minimizing the loss of highperformance heat transfer.

Open, offset vertical corrugations allow debris and biological growth foulant to pass, while providing maximum surface area and turbulence to develop evaporative heat transfer. Smooth surfaces without sharp intersections maintain water velocities and reduce the number of restrictions where biological growth begins.

MCR fill is thermoformed from .015 thick, chemically-resistant PVC (polyvinyl chloride). Material thicknesses of .020 and thicker are also available.

MCR is easily adapted to any tower’s configuration. The fill pack depth (fill height) is variable to provide the proper heat transfer area within a single fill layer. MCR counterflow fill can be hung from structural members or it can be bottom-supported in virtually all counterflow cooling towers, regardless of a cooling tower’s age or manufacturer.

Highlights:

• High Performance
• Hanging or bottom support design
• Variable air-travel sizes
• Cross-corrugated design

Related Information:

• Brochure

MC75 is a film fill system designed for counterflow towers offering you several distinct advantages.

Crossed corrugations provide the surface area and turbulence to develop efficient heat transfer. The corrugations inherently establish uniform fill sheet spacing at 0.75.

MC75 fill is thermoformed from .015 thick, UV inhibited, chemicallyresistant polyvinyl chloride (PVC). The flame spread rating is less than 25 per ASTM E-84 and is considered self-extinguishing.

The material is extruded and manufactured to rigid specifications before forming. Using Marley MC75 film fill in place of existing splash type fill in counterflow towers usually means reduced fill height, which translates into reduced pumping head. MC75 will also provide greater cooling tower capacity, which means your current performance level will require less fan energy.

The fill pack depth (air travel) is variable to provide the proper heat transfer area within a single fill layer. If another layer of fill is necessary for situations where additional air travel is required, it will be limited to only one. Limiting the number of interfaces between packs minimizes restrictions that usually cause fill clogging. MC75 counterflow fill can be hung from structural members or it can be bottom-supported in virtually all counterflow cooling towers, regardless of a cooling tower’s age or manufacturer.

Highlights:

• Vertical-flute film fill
• Efficient thermal performance
• Low maintenance
• Low clog design
• Log configuration

Related Information:

• Brochure

Marley’s Coolfilm™ fill consists of rigid polyvinyl chloride (PVC), impervious to decay, fungus and biological attack. The sheets are bonded to form a standard module size of 6 feet by 2 feet by 20 inches high (0.5 meter). The width and length of the module can be specified and the height can be changed to 10 inches upon request. Coolfilm modules are stacked horizontally, each layer perpendicular to the other.

The sheet pattern design allows for an optimal heat transfer per unit volume of fill with the corrugations on the vertical axis to help reduce the possibility of clogging and to allow condenser cleaning balls to pass. This style has demonstrated typical fouling rates to be one-third of the level associated with diagonal fluted fills. The flutes in Coolfim are vertical and aerodynamically shaped.

Sheet thicknesses available are 12 to 25 mils. Each sheet is bonded to the adjacent sheet at a minimum of four points per standard height (20”). The tested flame spread per ASTM-E-84 is 20. The number of flutes per sheet, as well as their shape and location within the sheet, promote optimum mixing of air and water at the boundary layer and drastically reduce pressure drop.

Highlights:

• Vertical-flute film fill
• Low maintenance
• Low clog design
• Low pressure drop

Related Information:

• Brochure

Marley’s Cleanflow™ anti-fouling film type fill consists of thermoformed corrugated sheets made of rigid polyvinyl chloride (PVC), impervious to decay, fungus and biological attack. The sheets are bonded to form modules which can be dimensioned to fit any application.

Cleanflow fill combines properties related to a media’s ability to allow substances to migrate through it, while maintaining thermal efficiency— this then allows for the use of film fill where fouling risks occur.

Each module consists of vertically channeled flat and corrugated surfaces, which essentially avoids contact between the sheets, thus eliminating water concentration. The horizontal corrugations and their location within the sheet promote optimum mixing of air and water. The flutes in the Cleanflow fill are vertically and aerodynamically shaped resulting in a reduction of pressure drop.

Highlights:

• Vertical-flute film fill
• Efficient thermal performance
• Low clog design
• Low maintenance
• Withstands foot traffic
• Resists erosion from water spray

Related Information:

• Brochure

FB20 clog-resistant film fill is constructed of fire-retardant PVC sheets bonded to form blocks of cooling media. The surface microstructure facilitates air/water mixing and increases the surface cooling area. The offset vertical flutes provide directional changes in air and water flow to increase cooling and promote thermal efficiency while substantially reducing the occurrence of fouling.

FC18, balcke

Highlights:

• Vertical-flute film fill
• Low clog design
• Low maintenance
• Withstands foot traffic
• Resists erosion from water spray

Related Information:

• Brochure

FC18 clog-resistant film fill is constructed of fire-retardant PVC sheets bonded to form blocks of cooling media. The microstructure on the surface of the sheets increases the cooling area and aids the cooling process. The vertical flutes allow even water flow through the media to minimize fill fouling.

Highlights:

• High-performance low-clog design
• Bottom supported
• Requires minimum number of supports
• Log configuration

Related Information:

• Brochure

DF381 is a film fill system designed to significantly reduce the risk of biological fouling without sacrificing high-performance heat transfer.

DF381 is a bottom supported lowclog log fill configuration. Open, angular cross-corrugations allow debris and biological growth foulant to pass, while providing maximum surface area and turbulence to develop efficient heat transfer. Texturing creates thermal capability improvement with little effect on fouling. DF381 offers low pressure drop in an aerodynamic, durable design.

DF381 is easily adapted to any tower’s configuration. To accommodate for various fill heights and/or desired duties, DF381 may be installed in multiple layers. DF381 fill is thermoformed from .020” thick, UV inhibited, chemically-resistant PVC (polyvinyl chloride). The material is extruded and manufactured to rigid specifications before forming, at one of Marley’s plastics facility.

In service now for over ten years at numerous installations throughout Europe, DF381 is now available globally for any counterflow cooling tower, regardless of a cooling tower’s age, design or manufacturer.

Highlights:

• High-performance low-clog design
• Bottom supported
• Requires minimum number of supports
• Log configuration

Related Information:

• Brochure
• SPX Profile

DF254 is a film fill system designed to significantly reduce the risk of biological fouling without sacrificing high-performance heat transfer.

DF254 is a bottom supported lowclog log fill configuration. Open, angular cross-corrugations allow debris and biological growth foulant to pass, while providing maximum surface area and turbulence to develop efficient heat transfer.

Texturing creates thermal capability improvement with little effect on fouling. DF254 offers low pressure drop in an aerodynamic, durable design.

DF254 is easily adapted to any tower’s configuration. To accommodate for various fill heights and/or desired duties, DF254 may be installed in multiple layers. DF254 fill is thermoformed from .020” thick, UV inhibited, chemically-resistant PVC (polyvinyl chloride). The material is extruded and manufactured to rigid specifications before forming, at one of Marley’s plastics facility.

Highlights:

• Heavy duty red brass body construction
• Buna rubber seal disc assures positive shut-off
• Free flow outlet
• Fully adjustable
• Available from 3/8" through 2" diameters
• Floats available in polypropylene or copper

Designed specifically for cooling tower duty, Marley make-up water float valves provide long life with little maintenance. Typically, valves are available in complete kits which include valve, float arm and float in kits to fit a specific application.

When installed some trial and error adjustment of the float valve may be required to balance the makeup water with tower operation. Ideally, the float valve setting will be such that no water is wasted through the overflow at pump shutdown. However, the water level after pump start-up must be deep enough to assure positive pump suction.

Highlights:

• Cast iron body
• Cast iron operating bar
• Cast iron locking bar
• Stainless steel stem
• Neoprene joint gasket and set for floating valve disc
• Economical compared to a separate valve and elbow

Related Information:

• Brochure

HC valve body proportions and the arrangement of internal parts provide a low discharge velocity and confine splash, resulting in low pressure drop.

The valve closure disc has a machined lip which closes on a heavy neoprene gasket, avoiding maintenance of expensive metal seats. In a shutoff position, the stem and yoke are external to the water, eliminating the necessity of valve stem packing.

The greatly simplified design insures long trouble-free operation with no costly repairs or maintenance.

Highlights:

• Self Draining
• Economical Installation
• Economical Operation
• Easy disassembly and reassembly
• Larger pipe spacing
• Easily adapts to a variety of nozzle spacings

Related Information:

• Brochure

Assembly of the entire system requires only a few simple hand tools. All connections are positive—yet the design allows repeated disassembly and reassembly.

Nozzles are installed in pairs—each supply pipe serving multiple pairs of nozzles. Multiple nozzle pairs per supply pipe mean larger pipe spacing and, therefore, lower installed cost than most other systems. The adaptor allows nozzle spacing on
3’-0” centers.

The nozzle outlet is always the lowest elevation in the distribution system. This arrangement is self draining when the supply water is shut off. There are no special valves to open or close.

The nozzle assembly is attached to the header/lateral using a unique design EPDM grommet that is inserted into the pipe—the entire assembly is attached with stainless steel strapping.

Highlights:

• Patented design
• Easy to install — no tools required to install into adaptor pipes
• Clog resistant
• No moving parts
• Self draining

Related Information:

• Brochure

The orifice sizes (1”-3 1/2”) of Marley NS nozzles are large enough that many competitive nozzles will actually fit inside a Marley nozzle. Marley counterflow nozzles have no internal parts or narrow passageways. The attached diffusion ring will not retain even fibrous debris.

“Full cone” distribution pattern assures uniform water distribution for all film fills. Minimal spray overlap is required, providing uniform water distribution even near spray boundaries. Marley NS counterflow nozzles develop uniform water distribution over a wide range of operating water pressures.

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Highlights:

• A truly "clog-resistant" crossflow nozzle
• Nozzles are spaced on nominal 2'-0" centers
• 1.875" and 2.5" orifice diameters available

Related Information:

• Brochure

The Marley NX nozzle is used only on splash-fill crossflow towers where objects in the water supply create blockage in smaller nozzles.

NX nozzles are injection-molded, highimpact black polypropylene. Each nozzle is a single assembly with no moving parts.

The NX nozzle is the ideal solution for overflowing basin problems due to clogged nozzles in splash-fill, industrial crossflow cooling towers.

Highlights:

• Patented design orifice
• The standard in crossflow nozzle design
• Available in 3 lengths to fit virtually every structural configuration
• 13 orifice diameters available for optimum performance adjustments
• No moving parts
• Wide range of adjustments in water flow rate

Related Information:

• Brochure

The Marley Spiral Target nozzle is an injection molded polypropylene unit consisting of two parts—the main body with integral target diffuser and a snap-on insert or orifice cap.

The orifice cap is available in 13 diameters ranging from .362 through 1.099. This amount of flexibility allows for a wide range of adjustment in water flow rates and basin water levels.

The Spiral Target nozzle is available in three lengths. The 2.625 nozzle is used on wood, steel, and fiberglass cooling towers where basin support structure does not obstruct the release of water. The 4.875 nozzle is used on larger industrial wood and concrete cooling towers and on applications where clogging might be a concern. The 6.875 nozzle is used on towers where the release of the water has to clear obstructions within the tower structure.

In every application the target portion of the nozzle should be located at the correct distance above the top of the cooling tower fill to obtain maximum water distribution over the fill area.