Clearflow RO-BW 400

The workhorse of the brackish range. A 6:3 taper on 40 in vessels, full interstage instrumentation and a normalisation routine that flags fouling long before the flow does.

What it is designed to do

The Clearflow RO-BW 400 is a standard Clearflow configuration rated at 40 m³/h of permeate at 78 % system recovery, which is 960 m³ over a continuous day. The published envelope assumes 25 °C, a clean membrane and the design feed analysis; every project is re-projected against the water you actually have before a price is issued.

• Feed envelope — up to 6,000 mg/L TDS, SDI15 below 4, turbidity below 0.5 NTU
• Membrane hardware — 54 elements across 9 vessels, 2,009 m² of active area
• Energy — 0.89 kWh/m³ of product at design conditions, 45 kW installed motor load
• Delivery — 6.2 × 2.0 × 2.6 m, 3,900 kg dry, 12–14 weeks ex works

How the array is put together

The array is arranged as 2 stage, 6:3 taper, 6 elements per vessel. Element type is BW 8040 low-energy, 37.2 m² each, running on thin-film composite polyamide. Design flux is held at 19.9 LMH so the concentrate velocity through the last element stays inside the manufacturer envelope at design recovery — the single most reliable predictor of how long the membranes will last.

Operating conditions

Cleaning, control and materials

Integrated three-stage CIP, 1,500 L heated tank. Control is by Industrial PLC with a 12 in HMI and normalised trending. The wetted specification is 316L wetted parts, FRP pressure vessels, grooved pipe couplings. Pressurisation is by vertical multistage 316L, 45 kW frame, variable frequency drive; concentrate throttling; turbine recovery available as an option.