1252/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. No reagents are needed for this — the accumulated sediment is flushed to drain by backwash, which also restores the filtering capacity of the media. The frequency of backwashing depends on the combined content of iron, manganese and hydrogen sulfide in the source water. Housings from 8 to 13 inches are fitted with 3/4″ and 1″ Runxin valves rated up to 4.5 m³/h, all top-mounted.

Design 1252/F71B: 12×52″ housing, automatic Runxin F71B valve, up to 2.0 m³/h, 3/4″ connection, top mounting. The valve is rated for filtration — backwash of the media without reagent. Weight 12.39 kg.

Configuration within the line: vessel size 1252 (12×52″) with control valve Runxin F71B. On the same vessel size 1252 (12×52″) the line also offers Runxin F67G, Runxin F67C3, Runxin F71P, Runxin F67C and others. The same control valve Runxin F71B is fitted on 0835, 0817, 0844, 1044 and others.

On vessel size 1252 the closest alternatives to Runxin F71B are Runxin F67G (valve capacity up to 4 m³/h instead of up to 2.0 m³/h, connection 1" instead of 3/4", weight 13.22 kg instead of 12.39 kg), Runxin F67C3 (valve capacity up to 4.5 m³/h instead of up to 2.0 m³/h, connection 1" instead of 3/4", weight 12.89 kg instead of 12.39 kg) and Runxin F71P (weight 12.4 kg instead of 12.39 kg).