Pharma gradeDouble-Pass RO
EDI Ultrapure Water System
Electrodeionisation after double-pass RO for 10–18 MΩ·cm water without chemical regeneration — the standard package for pharmaceutical and…
View detailsDouble-Pass RO
Double-Pass RO System
Two-stage reverse osmosis for conductivity below 5 µS/cm — the standard choice for pharmaceutical, electronics and food-grade process water.
- ZC-DPRO-5
- 0.5–20 m³/h
What makes this system different
- Conductivity 1–5 µS/cm
- Low silica and TOC permeate
- Sanitary 316L version for pharma
- Auto flush and standby mode
Double-pass RO runs the permeate of the first RO stage through a second membrane array. The result is a consistent conductivity of 1–5 µS/cm with very low silica and TOC, without the cost of EDI.
Design features
- Independent first and second stage arrays
- Intermediate tank with level control
- pH dosing between stages for CO₂ removal
- Automatic membrane flush on shutdown
- Sanitary option: 316L, tri-clamp, zero dead leg
Technical specifications
| Model | ZC-DPRO-5 |
|---|---|
| Capacity | 0.5–20 m³/h |
| Recovery rate | 55–70% |
| Salt rejection | ≥ 99.5% (two stage) |
| Installed power | 3–30 kW |
| Power supply | 380V / 50Hz / 3Ph (or to client standard) |
| Frame / wetted material | SS304 / SS316L sanitary option |
| Membrane | Dow BW30-4040 / BW30-8040 |
| Warranty | 24 months |
| Lead time | 25–35 days |
| Product conductivity | 1–5 µS/cm |
| Feed water | Municipal / softened, SDI < 5 |
| Pretreatment | Multimedia + softener + 5 µm |
| Control | PLC with conductivity trending |
Specifications are indicative. Final design is confirmed against your water analysis and site conditions.
Typical applications
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Pharma grade