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National Line Maindrain Modulating Valve The NFV-Series modulating float valve shall consist of a spool and flange body constructed of food grade isophthalic resin. The valve shall be installed on a mating horizontal companion flange discharging directly inside the balance tank. The valve shall have an imbalanced wafer type valve body. Stainless steel linkage and stop rods shall be secured to the pivot shafts located on each side of the body and shall be made buoyant by 7”0 polyethylene floats attached to a float-retaining rod. The valve disc shall be in a 20% open position with the floats up and fully open with the floats down. Key Benefits
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