I really like the app. It's easy to use. I wish all balancing valves had an app so I didn't have to worry about keeping track of a balancing wheel. There is one problem however. On this app I'm able to put in my setting and my pressure drop and the valve model but not the size of the valve. Every time I put in my info and it spits out a gpm it's never correct. I think it has to do with the fact you can't put in the valve size. Unless I'm missing it somewhere.

Units converter is handy for people working in an international firm, especially those poor engineers who actually can not afford to mess up!

Thanks for the update! Glad I can use it again!

The latest update does not let this app load properly. I use this app all the time for my work. I'm a iPhone 4S user please fix. Was a 5 star but now it's useless and simply a waste of space on my phone until it's fixed

This new app does not support American model STAD and STAF circuit setters. The app only contains sizing for European DIN numbers and not American sizes. I had to use the TA circuit setter wheel to balance the system.

老字号TA终于发布了与时俱进的好app，除平衡阀系列外还综合排气除渣产品和恒温阀等产品的选型，实用的水力计算。非常方便！