Check the listing for details. Understanding TXV Refrigeration Systems. Condition: New. Listed at 30.00 USD. Understanding TXV Refrigeration Systems: Superheat and Subcooling In this video training segment, Jim walks you through the fundamental operation of a thermostatic expansion valve and demonstrates how it operates to control refrigerant flow to a refrigeration system evaporator. He also uses graphics and demonstrations to show how to measure superheat and subcooling in TXV refrigeration systems. Jim is noted for his masterful communication skills and no-nonsense nuts and bolts approach to presenting technical information. Participants in his live training sessions around the nation for many years have commented that they come away with a complete understanding of the concepts they need to know in order to troubleshoot and service major appliances. Because of his unique methods and presentation style, viewing one of his videos is like being in a live workshop with Jim. This is a DVD training video. Shipping within the United States is free via Media Mail. Priority Mail is available for a fee. International buyers, please use shipping options. Check out my other items! Be sure to add me to your favorites list! FOR A SAMPLE VIDEO PLEASE GO TO:http://techtrainassoc.com/training-video-sample/ THIS IS ORIGINAL COPYRIGHTED MATERIAL BY THE AUTHOR. THIS ITEM IS GUARANTEED. ANY ITEM PURCHASED FROM ANOTHER SELLER NOT BEARING THE ORIGINAL TECHNICAL TRAINING ASSOCIATES LOGO COULD BE ILLEGALLY COPIED AND IS NOT GUARANTEED BY US. MORE INFORMATION ON THIS VIDEO AND THE INSTRUCTOR CAN BE FOUND AT: http://www.technicaltrainingassoc.com . Technical Training Associates Refund Policy: Due to piracy and copyright infringement practices, TTA does not offer refunds on books, DVD's, CD's, E-Books, or textbooks. All materials are guaranteed in regard to quality and workmanship. TTA offers a full replacement warranty on any defective product.