Backflow preventer (high risk)

Watts

Reduced pressure principle backflow prevention assembly, 2 independently acting and self-closing check valves, 2 shutoff valves and test valve.

Standard B64.4

Suffix

-QT : quarter turn ball valve (15 to 50 mm Ø)
-NRS : non-rising stem (65 to 80 mm Ø)
-OSY, -BFG : for fire protection system with chemicals/for OSY connection a supervisory valve must be installed (supplied by others)

A
Série LF009-QT

For horizontal installation
15 to 50 mm Ø
Air Gap device
909-AG

SPEC SHEET

B
Série silver LF909-QT

For horizontal installation 3/4 and 1 “,
vertical flow upwards
65 to 250 mm Ø

SPEC SHEET

C
Série Silver Eagle 957-NRS

For horizontal installation
65 to 250 mm Ø
Air Gap device
959-AG

SPEC SHEET