Rack Refrigeration Cycle Part 9 - Mechanical Expansion Valves

In Part 9 of our Rack Refrigeration Cycle series, Matthew Taylor dives deep into mechanical expansion valves - one of the most critical components in refrigeration systems. Learn about the three essential conditions required for proper metering device operation, the differences between internally and externally equalized TEVs/TXVs, and how proper valve sizing impacts system performance. Key topics covered: The three fundamental liquid conditions needed for expansion valve operation Thermal expansion valve operation and components P1, P2, P3, and P4 pressure relationships Internal vs external equalization - when to use each Proper valve sizing and correction factors Balanced vs non-balanced valve selection Q-body valve selection for supermarket applications Bulb placement considerations and best practices This in-depth training session is essential for anyone working with commercial refrigeration systems, especially supermarket rack systems. Whether you're an experienced tech or just starting out, Matt breaks down complex concepts into practical, actionable knowledge. #HVAC #Refrigeration #HVACtraining #SupermarketRefrigeration #hvaceducation Buy your tickets or learn more about the 6th Annual HVACR Training Symposium at https://hvacrschool.com/symposium. Read all the tech tips, take the quizzes, and find our handy calculators at https://www.hvacrschool.com/ or the HVAC School Mobile App on the Google Play Store (https://hvacrschool.com/play-store) or App Store (https://hvacrschool.com/app-store).