SPX Cooling Technologies 600 manual Drift Eliminators, Tower Structure

/ Drift Eliminators /

Marley towers utilize Marley XCEL®plus drift eliminators, a cellular, labyrinthine design which improves drift elimination by several orders of magnitude over that achievable by blade-type eliminators. Significantly lower pressure losses also reduce fan horsepower requirements.

XCEL eliminators are thermoformed PVC bonded into easily handled, rigid packs which “nest” together to seal against drift bypass. Packs are clamped in place at each girt line, and are self-supporting between girt lines. No additional structure is required to support the eliminators. Corrosion and chemical resistant plastic drain boards return all water stripped from the air to the fill chamber.

/ Tower Structure /

Class 600 cooling towers are designed in accordance with the latest edition of the National Design Specification for Wood Construction (NDS) published by the National Forest Products Association, and CTI STD-114. Wind load criterion is per ASCE-7, and stability is based upon an applied lateral load of 2.5% of the total operating weight. Allowable stress values for all lumber are reduced for wet service, temperature, and duration as appropriate.

Unless otherwise specified, all lumber regardless of species is pressure treated after fabrication. Treatment is Copper Chromate Arsenate (CCA), infused into the wood as specified by CTI STD-112.

The design is based on 4′-0″ x 8′-0″ modules. Transverse bents consist of 4″ x 4″ columns spaced on 8′-0″ centers. Transverse bent lines are spaced on 4′-0″ centers longitudinally.

Transverse fan deck and hot water basin girts are 2″ x 6″—all other transverse girts and all longitudinal girts are 2″ x 4″ except where loading may require 3″ x 4″. Transverse and longitudinal girts are spaced on

6′-0″ vertical centers. Girt lines are through bolted to the columns.

Transverse and longitudinal diagonals are

4″ x 4″members spliced across tower columns with FRP connectors. The connectors transmit lateral loads from girts to diagonals and columns.

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