I walked into a supply house the other day and looked at a “universal” expansion valve on the shelf. The friendly guy behind the counter saw me and walked over. After saying hello, he said: “That's a great valve; it's even balanced port.” Now, I am a bit of a troublemaker. I should have […]

I live in Central Florida, and while it can get pretty hot in the summer, we also tend to get afternoon thunderstorms that come and go in a flash. I have been connecting gauges, checking charges, and even pulling vacuums in the rain (even under umbrellas or cardboard boxes) for most of my career. Only […]

Photo Courtesy of Parker/Sporlan There are many brands and styles of evaporator pressure regulating valves (EPR), but none as common as the Parker/Sporlan SORIT and ORIT valves. The diagram above clearly shows some of the common applications. An EPR or “hold back” valve maintains a set suction line pressure and, therefore, coil temperature. That is […]