⚡ High Flow Industrial Capacity
3000L/H (72,000 GPD) output. Three ULP21-8040 large-area membranes. Desalination rate ≥97%. 380V/4.5KW.
🧪 Chemical Dosing System
Built-in dosing tank + dosing pump. Anti-scalant injection prevents membrane fouling. Extends membrane life.
🔧 Complete 3-Stage Treatment
Sand filter + Carbon filter + Cartridge filter + Dosing. Full protection for challenging feed water.
Product Short Description
High capacity. Anti-scaling protection. Industrial reliability.
The 3000L/H 3-Stage RO system features sand filter, carbon filter, precision filter, and chemical dosing system — essential pre-treatment plus anti-scalant injection for challenging feed water. Three ULP21-8040 large-area membranes deliver 3000L/H (72,000 GPD) with fewer components. Perfect for large factories, industrial facilities, beverage plants, and commercial water production.
Product Highlights
| 🧱 Complete 3-Stage Pre-treatment | ⚡ High Flow 8040 Triple Membranes |
|---|---|
| Sand filter + Carbon filter + Cartridge filter. Essential protection for tap water and well water. | Three ULP21-8040 large-area membranes. 3000L/H output. Desalination rate ≥97%. 380V/4.5KW. |
| 🧪 Chemical Dosing System | 🔌 Plug & Play |
|---|---|
| Dosing tank + dosing pump for anti-scalant injection. Prevents membrane scaling, extends membrane life. | Pre-assembled on steel frame. Connect water and power. Start within 4-6 hours. |
| 🏭 Industrial Grade | ✅ CE Certified |
|---|---|
| Heavy-duty steel frame. FRP tanks with auto valves. Built for 24/7 continuous operation. | 1-year warranty. Factory direct from China. OEM customization available. |
Applications
| Application | Description |
|---|---|
| 🏭 Large Factory | Process water, cleaning water, boiler feed water |
| 🏭 Beverage Plant | Production water for soft drinks, juices, beer |
| 🏨 Large Hotel | Guest drinking water, kitchen water, laundry, pool |
| 🏥 Large Hospital | Medical pure water, instrument cleaning, dialysis |
| 🏘️ Large Community | Centralized water supply for large communities |
| 💧 Commercial Water Plant | Bottled water, bagged water production |
| 🏭 Industrial Process | Cooling tower makeup, boiler feed water |
Filtration Process
Raw Water → Sand Filter → Carbon Filter → Anti-Scalant Dosing → Cartridge Filter → High Pressure Pump → RO Membranes (8040×3) → Pure Water
| Stage | Component | Function |
|---|---|---|
| 1 | Sand Filter | Removes sediment, rust, suspended solids |
| 2 | Carbon Filter | Removes chlorine, odor, organic matter |
| 3 | Dosing System | Injects anti-scalant to prevent membrane scaling |
| 4 | Cartridge Filter | 5μm fine filtration, protects RO membranes |
| 5 | RO Membranes (8040×3) | Removes up to 99% of dissolved salts, bacteria, viruses |
Technical Specifications
| Parameter | Value |
|---|---|
| Model | FRO-218-3T-3D |
| Type | Skid-Mounted RO System (3 Tanks with Dosing) |
| Flow Rate | 3000 L/H (≈ 72,000 GPD) |
| Desalination Rate | ≥97% |
| Recovery Rate | 50-75% (Adjustable) |
| Membrane | ULP21-8040 × 3 |
| Single Membrane Area | 37.2 m² |
| Total Membrane Area | 111.6 m² |
| Tank Configuration | Sand Filter + Carbon Filter + Cartridge Filter (3 tanks) |
| Tank Material | FRP (Fiberglass Reinforced Plastic) |
| Tank Dimensions | L1450×W550×H2020 mm (each) |
| Pre-treatment | Sand + Carbon + Cartridge |
| Dosing System | Dosing tank + Dosing pump (for anti-scalant) |
| Voltage | 380V / 50Hz (220V/60Hz optional) |
| Power | 4.5 KW |
| Frame | Steel, Skid-Mounted |
| Machine Dimensions | 1900×800×1740 mm |
| Tank Dimensions (total setup) | 1450×550×2020 mm (per tank) |
| Weight | 700 kg |
| Feed Water Source | Tap water, well water, groundwater (TDS ≤ 2000 ppm) |
| Warranty | 1 Year |
| Certification | CE |
What’s Included in the System?
| Component | Qty |
|---|---|
| Sand Filter (FRP with auto valve) | 1 |
| Carbon Filter (FRP with auto valve) | 1 |
| Cartridge Filter (20 inch) | 1 |
| Dosing Tank (PE) | 1 |
| Dosing Pump | 1 |
| RO Housing (FRP / SS) for 8040 | 3 |
| RO Membrane (ULP21-8040) | 3 |
| High Pressure Pump (4.5KW, 380V) | 1 |
| Steel Frame (Skid-Mounted) | 1 |
| PLC Control Panel | 1 |
| Piping & Fittings | 1 set |
| Pressure Gauges & Flow Meters | 1 set |
Note: Raw water tank and pure water tank are not included. They can be purchased separately.
Chemical Dosing System: Why It Matters
The Problem
High scaling potential water (high silica, high hardness, high TDS) causes:
- ❌ Scale buildup on RO membranes
- ❌ Reduced water output
- ❌ Increased pressure drop
- ❌ Frequent chemical cleaning
- ❌ Shortened membrane life
The Solution
Our system includes a chemical dosing system:
| Feature | Benefit |
|---|---|
| Anti-scalant injection | Prevents scale formation on membrane surface |
| Adjustable dosing rate | Customizable for different water qualities |
| Dosing tank + pump complete | Ready to use, no additional components needed |
Result: Extended membrane life · Reduced cleaning frequency · Stable operation
When to Choose Dosing System vs Softener
| Water Characteristic | Recommended Solution |
|---|---|
| High hardness (Ca²⁺, Mg²⁺) | Softener |
| High silica, high TDS, complex scaling potential | Chemical Dosing System |
| Limited space, lower budget | Chemical Dosing System |
| Both hardness and scaling potential | Softener + Dosing |
| Want fewer components | Chemical Dosing System |
This system includes a chemical dosing system — ideal for challenging feed water where a softener is not sufficient or practical, while using only 3 x 8040 membranes for simplicity and high flow.
Key Features
Feature 1: 3000L/H High Capacity Industrial Flow
- 72,000 GPD daily output
- Suitable for 6,000-8,000 people
- Perfect for large factories, industrial facilities, beverage plants, and commercial water production
Feature 2: 3 x ULP21-8040 Large-Area Membranes
- Three 8040 membranes in parallel
- Total membrane area: 111.6 m² (29% more than 12 x 4040)
- Desalination rate ≥97%
- Low pressure operation (8-12 bar), energy saving
- 3000L/H stable output
Feature 3: Chemical Dosing System
- Prevents membrane scaling
- Extends membrane cleaning interval
- Reduces maintenance cost
- Adjustable dosing rate
Feature 4: 3-Stage Pre-treatment
| Tank | Function |
|---|---|
| Sand Filter | Removes sediment, suspended solids |
| Carbon Filter | Removes chlorine, odor, organics |
| Cartridge Filter | 5μm fine filtration |
Feature 5: Industrial Grade Construction
- Heavy-duty steel frame — 700kg robust design
- FRP tanks — corrosion-resistant, durable
- Separate tank dimensions: 1450×550×2020 mm each
- Designed for 24/7 continuous industrial operation
Feature 6: PLC Auto Control
- One-key start
- Auto flush
- Low pressure protection
- Fault alarm display
Dosing System Specifications
| Item | Specification |
|---|---|
| Dosing Tank Material | PE (Polyethylene) |
| Dosing Tank Capacity | 40L / 100L (optional) |
| Dosing Pump Type | Diaphragm metering pump |
| Dosing Pump Capacity | 1-5 L/H (adjustable) |
| Recommended Chemical | RO anti-scalant (standard) |
| Chemical Consumption | Approx. 3-5 ppm of feed water flow |
Physical Dimensions
| Component | Dimensions (L×W×H) |
|---|---|
| Machine Frame | 1900×800×1740 mm |
| Sand Filter Tank | 1450×550×2020 mm |
| Carbon Filter Tank | 1450×550×2020 mm |
| Cartridge Filter | 20 inch (standard) |
| Dosing Tank | 40L / 100L |
| Total System Footprint | Approx. 4×2.5 m |
8040 vs 4040 Detailed Comparison
| Parameter | 12 x 4040 System | 3 x 8040 System (This Model) |
|---|---|---|
| Number of membranes | 12 | 3 |
| Single membrane area | 7.2 m² | 37.2 m² |
| Total membrane area | 86.4 m² | 111.6 m² |
| Membrane housings needed | 12 | 3 |
| Inter-connecting piping | Very complex | Simple |
| O-rings / seals | 24+ | 6 |
| Potential leak points | Many | Few |
| Installation time | 2-3 days | 4-6 hours |
| Spare parts inventory | High | Low |
| Maintenance complexity | Very high | Low |
| Floor space required | Large | Compact |
FAQ
1. What is the daily output?
3000 L/H equals approximately 72,000 gallons per day (about 72 tons), enough for 6,000-8,000 people.
2. What is the advantage of 8040 membranes over 4040?
Three 8040 membranes provide 111.6 m² of membrane area — 29% more than twelve 4040 membranes (86.4 m²). Fewer components (3 housings vs 12), less piping, lower leak risk, and much easier maintenance.
3. What is the chemical dosing system for?
It injects anti-scalant into the feed water before the RO membranes. This prevents scale formation, extends membrane life, and reduces cleaning frequency.
4. Do I need to buy the chemical separately?
Yes. Anti-scalant is not included. We can recommend suitable products based on your water quality.
5. How often do I need to refill the dosing tank?
Depending on your water flow and dosing rate, a 40L tank typically lasts 2-4 weeks. For 3000L/H system, we recommend the 100L tank for longer operation between refills.
6. What is the difference between this and a softener system?
Softener removes hardness ions (Ca²⁺, Mg²⁺). Dosing system injects anti-scalant to prevent scale. For high silica or complex water, dosing is more effective. For very high hardness, a softener may still be needed.
7. What voltage is required?
Standard 380V / 50Hz (3-phase). 220V / 60Hz is available upon request.
8. How much floor space is required?
Approximately 8-10 square meters, including tanks, frame, and operation/maintenance access.
9. How long does installation take?
About 4-6 hours for the main system. Tank connections may take additional time. The system comes pre-assembled — just connect water inlet, drain, and power.
10. What is the MOQ?
1 set. OEM customization available for bulk orders.
Why Buy From Us?
| ✅ Factory Direct | ✅ CE Certified | ✅ 1-Year Warranty |
|---|---|---|
| No middleman. Better price. | Internationally certified. | Peace of mind. |
| ✅ OEM Available | ✅ 24/7 Support | ✅ Global Shipping |
| Custom logo, color, voltage. | We’re here to help. | Delivered worldwide. |
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