At, The NEWS’ Extra Edition page is home to hundreds of online-exclusive service and maintenance, technical, and business-management articles. Here are some of the best.

Screw Compressor Teardown: A Few Basics - Part 1

This first part of a two-part series provides some background on screw compressors. Screw compressors can feature twin helical screws or a single screw design. They can be open drive, semi-hermetic, or hermetic in configuration. In addition, there are oil-flooded compressors and non-oil (dry) compressors. Screw compressors are designed to work in a wide variety of applications including, but not exclusively limited to, refrigeration, comfort cooling, open-loop gas processes, and air compression.

Free Advertising: Promoting With Publicity

Advertising, of course, is the most direct way to promote your company. You control when it runs, where it runs, and what it says. If you want to stretch your advertising dollars as far as possible, publicity is the way to catch a “free ride.” Free publicity can’t replace direct-response advertising as a way to generate leads. But it can increase your company’s name recognition and remind your customers of your existence. It also helps with “top-of-mind awareness.”

Screw Compressor Teardown: A Few Basics - Part 2

This second of a two-part series discusses maintenance of the screw compressor. To ensure a full operating life from a compressor, preventive maintenance is essential. Because the compressor is mounted on a unit, operating conditions of the unit play a major role in the life of the compressor. This list of preventive maintenance items deals with both the compressor and the unit. Be sure to always follow the manufacturer’s recommendations. However, this list can be applied to most systems.

An Outline for Successful Fan Selections

This article outlines the considerations involved to properly select, apply, and control fans. Emphasis is placed upon matching the fan equipment to the requirements of the system from several different perspectives. An improperly selected and applied piece of equipment can be rendered completely ineffective if the application itself is not properly defined right at the beginning. It is imperative to address each and every one of the items listed in this article.

Publication date: 9/23/2013

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