Watts® Series LF9D Dual Check Valve with Intermediate Atmospheric Vent

Series LF9D is specially made for smaller supply lines and ideally suited for ice makers, steamers, laboratory equipment, processing tanks, sterilizers, dairy equipment and similar applications. It is particularly recommended for boiler feed lines to prevent backflow when supply pressure falls below system pressure.
Series LF9D is suitable for use on hot or cold water and can be used under continuous pressure. It features a primary check valve utilizing a rubber disc seating against a mating rubber part to ensure tight closing. A secondary check valve utilizes a rubber disc-to-metal seating. In the event of fouling of the downstream check valve, leakage would be vented to atmosphere through the vent port thereby safeguarding the potable water system. Construction is a lead free* brass body with stainless steel working parts, integral strainer and durable rubber discs. Female union inlet and outlet connections. Sizes 1⁄2" and 3⁄4". Drain is 1⁄2" thread connection.

Stroke

4 Stroke

Max Power

62kW/6000 (r/min)

Cylinders

2 Cylinder

Max Torque

101N·m/5000 (r/min)

Displacement (ml)

1000CC