Q What is the correct method of piping two 30-ton TEVs from a common liquid line?

A First , it should go without saying that the main liquid line should be sized to handle the requirement of two 30 ton TEVs. My personal piping preference is to not bull-head Tees . The accepted configuration for piping Tees is this: The main liquid line is brazed to the Tee inlet, the branch liquid feed is brazed to the side outlet fitting on the Tee, and the continuation of the main liquid line is connected to the outlet of the Tee. Each section of liquid line is sized appropriately for the refrigerant mass flow it is required to deliver. So, you would expect the side outlet fittings on the Tee to be smaller than the inlet fitting. The Tee should be oriented such that the side outlet fitting is pointing downward. If there happens to be some vapor in the liquid line, the feeds off the bottom would be supplied with 100% liquid... in theory! The potential problem with the bull head is that if vapor were present, it would be equally divided and fed to each outlet of the bull-headed Tee outlets. I personally don't like bull heading Tees at all, and I think the practice of not bull-heading Tees is probably a standard in many specifications as well as a lot of people's minds. That's my preference and I think that most of the piping material I have seen over the course of years has discouraged the use of bull-headed Tees .

Question from Leonard Holst, CM, Caldwell , ID. Answer by Dave Demma, CM, Supermarket Sales Manager, Sporlan/Parker Hannifin.