SPX Cooling Technologies 160 manual Construction and Components, Fill/Louvers/Drift Eliminators

/ Construction and Components /

■Fill/Louvers/Drift Eliminators

Marley high-performance film fill is the heart of every Class 160 tower. A repeating chevron pattern provides the wetted surface and air turbulence necessary for proper heat transfer, while minimizing resistance to airflow so you’ll save on fan power. Molded protrusions on each fill sheet assure uniform spacing.

Fill sheets are vacuum formed 15 mil (.015″) thick PVC (polyvinyl chloride) capable of service at hot water temperatures up to 120°F. Consult your Marley sales representative for applications where hot water temperatures are greater than 120°F yet less than 145°F to determine upgrade possibilities. Stainless steel structural tubes resting in stainless steel hangers support the fill, and PVC tubes control alignment. This system also holds the bottom of the fill sheets above the cold water basin floor to simplify basin cleaning.

Fill sheets include both louvers and drift eliminators. The louvers in this patented arrangement keep water on the fill sheets and in your tower, and also assure proper heat transfer throughout wide variations in airflow. Users find this fill operates ice-free even in extremely cold weather.

Integral drift eliminators prevent the costly nuisance of drift spotting on objects in the surround­ing­ environment. Their unique shape induces the air flow through three distinct direction changes as shown below. The final turn directs air toward the fan to save you fan horsepower. Moisture carried in the air stream can’t make these abrupt turns, so drift is less than 0.005% of the circulating water flow rate.

■Mechanical Equipment

The Marley Geareducer speed reducer used in the Class 160 line contributes a long record of dependability, long service life, and low maintenance. Their designs meet or exceed the requirements of CTI STD-111 and AGMA Std. 420.04. We run- in every Geareducer unit under load prior to shipment to make sure that it will operate properly on your tower.

Housings are gray cast iron. Gears are high-strength, case hardened alloy steel. And all bearings are tapered roller bearings. A variety of available horsepower capacities and reduction ratios lets us choose the optimum Geareducer model and fan speed for your job. Service factors are always at least 2.0 as applied.

Splash-type lubrication and integral cooling fins preclude the need for maintenance-intensive oil pumps and coolers. A constant oil bath or flow lubricates every bearing in forward or reverse motion—at full or half speed.

All Marley Geareducer assemblies are rightangle type with motors located outside the tower’s saturated airstream.

A galvanized steel lube line runs from the Geareducer unit to a standpipe near the motor on each cell, so you can check oil level and change or add oil while standing on the fan deck.

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