ASSE LEC 2010
Proportional Flow Control Devices, with Protection from Cross-Contamination via Hydronic Water, for use in Drinking Water Installations
The purpose of the device is to control the flow of potable water based on the pressure of
hydronic water from a hydronic system. The device performs this hydraulically and has integral
cross contamination protection between the potable and hydronic water. This device is typically
installed in conjunction with a heat exchanger and a part of a hydronic system loop.
This device consists of a single potable cold water supply inlet and outlet, and a single hydronic
supply inlet and outlet, a means of dynamic flow control, an atmospheric vent, and two sets of
three dynamic seals between the potable and hydronic flow paths.