1665/F75A1 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/F75A1: 16×65″ housing, automatic Runxin F75A1 valve, up to 10.0 m³/h, 2" connection, top mounting. The valve is designed for filtration — reagent-free backwash of the load. Weight 29.75 kg.

Configuration within the line: vessel size 1665 (16×65″) with control valve Runxin F75A1. On the same vessel size 1665 (16×65″) the line also offers Runxin F67P, Runxin F75Q1, Runxin F71B, Runxin F67G and others. The same control valve Runxin F75A1 is fitted on 1465, 1865, 2162, 3072 and others.

On vessel size 1665 the closest alternatives to Runxin F75A1 are Runxin F67P (valve capacity up to 4.5 m³/h instead of up to 10.0 m³/h, connection 1" instead of 2", weight 26.1 kg instead of 29.75 kg), Runxin F75Q1 (weight 29.25 kg instead of 29.75 kg) and Runxin F71B (valve capacity up to 2.0 m³/h instead of up to 10.0 m³/h, connection 3/4" instead of 2", weight 25.6 kg instead of 29.75 kg).