1665/F71B reagent-free filtration unit

The reagent-free filtration unit removes dissolved iron, manganese and hydrogen sulfide from water, along with turbidity and color, bringing the water to the required standards. Inside: a fiberglass housing laminated with polyethylene on the inside, an automatic control valve, granular filter media, a supporting gravel layer, and a drainage-distribution system.

The media oxidizes dissolved iron and manganese directly: passing through it, they convert to an insoluble form and precipitate as sediment, which is retained within the media bed and flushed to drain by backwash — no reagents are consumed. Housings from 14 to 21 inches are sized for flow rates that require a larger volume of media and faster backwashing: in this group, 2″ Runxin models rated up to 10 m³/h are added alongside the 3/4″ and 1″ valves, with top valve mounting.

Design 1665/F71B: 16×65″ housing, automatic Runxin F71B valve, up to 2.0 m³/h, 3/4" connection, top mounting. The valve is designed for filtration — reagent-free backwash of the load. Weight 25.6 kg.

Configuration within the line: vessel size 1665 (16×65″) with control valve Runxin F71B. On the same vessel size 1665 (16×65″) the line also offers Runxin F67P, Runxin F75Q1, Runxin F67G, Runxin F67Q1 and others. The same control valve Runxin F71B is fitted on 0835, 0817, 0844, 1044 and others.

On vessel size 1665 the closest alternatives to Runxin F71B are Runxin F67P (valve capacity up to 4.5 m³/h instead of up to 2.0 m³/h, connection 1" instead of 3/4", weight 26.1 kg instead of 25.6 kg), Runxin F75Q1 (valve capacity up to 10.0 m³/h instead of up to 2.0 m³/h, connection 2" instead of 3/4", weight 29.25 kg instead of 25.6 kg) and Runxin F67G (valve capacity up to 4 m³/h instead of up to 2.0 m³/h, connection 1" instead of 3/4", weight 26.43 kg instead of 25.6 kg).