STjh 643-ton double-cell induced-draft cooling tower with enlarged twin fan assemblies and side louvers on white.

STJH-INDUCED-DRAFT-COOLING-TOWER-643TON

Induced-Draft Counterflow Cooling Tower 643-Ton Double-Cell

A 643-ton double-cell tower using 40 hp fan power and 169240 CFM while retaining the 17 ft 3 in x 18 ft 1 in footprint.

643 nominal tons
40 hp fan power
Same plan footprint as lower model

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Product Introduction

This medium variant retains the lower tower's footprint and 9 ft 10 in height but raises fan power to 40 hp and airflow to 169240 CFM. The resulting 643-ton rating serves plants that need more heat rejection without expanding the plan area.

Key Features

Higher output per footprint

Increased fan and thermal hardware adds nominal tonnage without widening the two-cell frame.

Staged double-cell operation

The two air paths can respond independently to changing condenser load and service needs.

Increased induced airflow

The 169240 CFM fan duty draws more ambient air through the counterflow fill.

Technical Parameters

Nominal Tonnage	643 tons
Cell Quantity	2
Fan Motor Selection	40 hp class
Fan Airflow	169240 CFM
Dimensions	17 ft 3 in x 18 ft 1 in x 9 ft 10 in
Thermal Arrangement	Induced-draft counterflow
Basin	Shared or divided collection arrangement by selection
Fan Control	Variable-speed or staged
Installation	Outdoor structural base
Customization	Water distribution, material and control options can be configured for the intended application and operating environment.

Applications

Medium-to-large clean manufacturing condenser-water systems, process chillers and pharmaceutical central utility plants.

Solutions for Your Application

The site cannot enlarge the tower footprint but needs more heat rejection than 585 tons.Use the 643-ton fan and thermal configuration within the same published plan dimensions.

Higher fan power can increase sound and electrical demand.Coordinate 40 hp supply, variable-speed control and acoustic treatment against the site limit.

Available Options

Low-sound fans, VFD control, basin heat, upgraded materials, drift eliminators, access ladders and water-treatment interfaces are available.

Planning a Induced-Draft Counterflow Cooling Tower 643-Ton Double-Cell specification?

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