⚡ High Flow Capacity
1500L/H (36,000 GPD) output. Four ULP21-4040 low-pressure membranes. Desalination rate ≥97%. 220V/1.8KW.
🧪 Chemical Dosing System
Built-in dosing tank + dosing pump. Anti-scalant injection prevents membrane fouling. Extends membrane life.
🔧 Easy Operation
PLC auto control with auto flush and low pressure protection. No dedicated operator needed.
Product Short Description
High flow. Anti-scaling protection. Reliable.
The 1500L/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. Four ULP21-4040 membranes deliver 1500L/H (36,000 GPD). Perfect for medium to large factories, hotels, and industrial applications.
Product Highlights
| 🧱 Complete 3-Stage Pre-treatment | ⚡ High Flow Quad Membranes |
|---|---|
| Sand filter + Carbon filter + Cartridge filter. Essential protection for tap water and well water. | Four ULP21-4040 low-pressure membranes. 1500L/H output. Desalination rate ≥97%. 220V/1.8KW. |
| 🧪 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 hours. |
| 📦 Robust FRP Tanks | ✅ CE Certified |
|---|---|
| Three FRP tanks (sand, carbon, cartridge) with auto valves. Durable and corrosion-resistant. | 1-year warranty. Factory direct from China. OEM customization available. |
Technical Specifications
| Parameter | Value |
|---|---|
| Model | FRO-214-1.5T-3D |
| Type | Skid-Mounted RO System (3 Tanks with Dosing) |
| Flow Rate | 1500 L/H (≈ 36,000 GPD) |
| Desalination Rate | ≥97% |
| Recovery Rate | 50-65% (Adjustable) |
| Membrane | ULP21-4040 × 4 |
| Total Membrane Area | 28.8 m² |
| Tank Configuration | Sand Filter + Carbon Filter + Cartridge Filter (3 tanks) |
| Tank Material | FRP (Fiberglass Reinforced Plastic) |
| Pre-treatment | Sand + Carbon + Cartridge |
| Dosing System | Dosing tank + Dosing pump (for anti-scalant) |
| Voltage | 220V / 50Hz (380V/60Hz optional) |
| Power | 1.8 KW |
| Frame | Steel, Skid-Mounted |
| Dimensions | 1405×705×1850 mm |
| Weight | 450 kg |
| Feed Water Source | Tap water, well water, groundwater (TDS ≤ 1500 ppm) |
| Warranty | 1 Year |
| Certification | CE |
Filtration Process
Raw Water → Sand Filter → Carbon Filter → Anti-Scalant Dosing → Cartridge Filter → High Pressure Pump → RO Membranes (×6) → 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 (×4) | Removes up to 99% of dissolved salts, bacteria, viruses |
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) | 2 |
| RO Membrane (ULP21-4040) | 6 |
| High Pressure Pump (1.8KW, 220V) | 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
- ❌ 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 |
This system includes a dosing system — ideal for challenging feed water where a softener is not sufficient or practical.
Key Features
Feature 1: 1500L/H High Flow Rate
- 36,000 GPD daily output
- Suitable for 3,000-4,000 people
- Perfect for large hotels, medium factories, community water stations
Feature 2: Quad ULP21-4040 Membranes
- Four membranes in parallel
- Total membrane area: 28.8 m²
- Desalination rate ≥97%
- Low pressure operation (8-12 bar), energy saving
- 1500L/H stable output
Feature 3: Chemical Dosing System
- Prevents membrane scaling
- Extends membrane cleaning interval
- Reduces maintenance cost
- Adjustable dosing rate
Feature 4: 450kg Robust Construction
- Heavy-duty steel frame
- FRP tanks — corrosion-resistant, durable
- Stable operation for 24/7 production
Feature 5: PLC Auto Control
- One-key start
- Auto flush
- Low pressure protection
- Fault alarm display
Applications
Applications
| Application | Description |
|---|---|
| 🏭 Medium to Large Factory | Process water, cleaning water, boiler feed water |
| 🏨 Large Hotel | Guest drinking water, kitchen water, laundry, pool |
| 🏘️ Residential Community | Centralized water supply for large communities |
| 🥤 Beverage Plant | Production water for drinks |
| 🏭 Industrial Process | Cooling tower makeup, boiler feed water |
FAQ
1. What is the daily output?
1500 L/H equals approximately 36,000 gallons per day (about 36 tons), enough for 3,000-4,000 people.
2. What type of water can this system handle?
Tap water, well water, groundwater with TDS up to 1500 ppm. The dosing system helps prevent scaling from high silica or complex water chemistry.
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. We can calculate exact consumption based on your operating hours.
6. What is the difference between this and the softener model?
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. Can this system run on 220V?
Yes. Standard 220V / 50Hz. 380V / 60Hz is available upon request.
8. How long does installation take?
About 4 hours. The system comes pre-assembled — just connect water inlet, drain, and power.
9. 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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