The only thing new to your existing system is the hose coming down from the batch heater, the batch connect valve, and the “T” connector at the Hot Out valve to tie it all together.
整个热水系统中只有从批量加热热水器引水的软管、连接阀、以及接在止热阀（the Hot Out valve）上用作贯通的三通是新添加的。
2
Experimental results have shown that the system features precise speed control and simple design as compared to the sensing circuit controlled by T-type proportional speed regulation valve.
试验结果表明，与比例三通调速阀控制的敏感回路相比，该系统速度控制精度高，结构简单。
3
The T&P valve shall be a Watts Regulator Company Series 40, 140, 240 or 340.