Articles, Links and Resources

The twenty-first century marks a new era for the world’s oldest and most reliable heat transfer system—steam. The secret to high tech steam is the trap. The better we trap steam, the more energy efficient and powerful our systems become. Today, with closed-loop systems, electronic controls, and 100% calibrated traps, steam has re-emerged as one of the most cost effective and reliable energy transfer systems for institutional, commercial and multi-unit residential applications.

In a properly designed system, nearly all of the energy used to produce the steam can be delivered to a terminal component or heat transfer device and released. A modern steam system, even an upgrade of a hundred year old system, can actually be more efficient and reliable than any other type of heating system.

Barnes & Jones Articles on Steam

Reevaporation and Its Effect on the Heating System

Limitations of Fixed Orifice Devices


Conversion Factors

Orifice Diameters

Steam Table and Definitions

Steam Trap Sizing Capacities

Steam Trap Sizing Rules of Thumb

Here are links to other steam and hydronic resources on the web including major publications and engineering firms.

Plumbing & Mechanical

The only magazine exclusively serving over 44,000 plumbing, heating, and piping contractors.

PM Engineer

Their editorial mission is to provide specifying and consulting engineers with the most accurate and enlightening information to help them succeed in their technical and business endeavors.

State Supply

The leading national wholesaler of Steam Traps and Steam Trap Repair Parts.

Dan Holohan Associates –

A collection of books and articles on steam and hydronic heating.