Automatic Boiler Fill Valve w/Backflow Preventer
Function
The automatic filling valve is a device consisting of a pressure reducing
valve with compensating seat, visual system pressure setting
indicator, an inlet filter, anti-scale internal parts, a shut-off valve
(round knob on bottom) and a check valve.
It is installed on the water inlet piping in sealed heating systems, and
its main function is to maintain the pressure of the system at a set
value, automatically filling up with water as required.
The valve is pre-adjustable, meaning it can be set to the desired
pressure value before the system charging phase. After installation,
during the filling or topping-off phase, the water feed
will stop when the set pressure is reached. This valve fills 50% faster
than other valves. There are no levers to flip or valve to close.
Pre-assembled with the 573 series backflow preventer, the AutoFill™ Combo
features an atmospheric vent which is designed to protect drinking water
systems from return flow, caused by back-siphoning or back pressure, of
contaminated fl uids. The 573 series has been specifically certifi ed to
standards CSA B64.3 and ASSE 1012.
