⚡ Energy Saving
High efficiency operation
🔧 Easy Maintenance
Simple maintenance
🛠 Durable Design
Long service life
Product Short Description
Double the flow. Complete hardness protection.
The 500L/H 4-Tank RO system features sand filter, carbon filter, softener, and precision filter — full pre-treatment for borehole and well water. Dual ULP21-4040 membranes deliver 500L/H (12,000 GPD). Perfect for small factories, hotels, schools, and communities with high hardness groundwater.
Product Highlights
| 🛡️ Complete 4-Stage Pre-treatment | ⚡ Dual ULP Membranes |
|---|---|
| Sand filter + Carbon filter + Softener + Cartridge filter. Essential protection for high hardness well water and groundwater. | Two ULP21-4040 low-pressure membranes. 500L/H output. Desalination rate ≥97%. 220V/1.5KW. |
| 💧 Softener Included | 🔌 Plug & Play |
|---|---|
| Removes calcium and magnesium. Prevents RO membrane scaling. Extends membrane life by 30-50%. | Pre-assembled on steel frame. Connect water and power. Start within 4 hours. |
| 📦 Robust FRP Tanks | ✅ CE Certified |
|---|---|
| Four FRP tanks with auto valves. Durable, corrosion-resistant, designed for harsh water conditions. | 1-year warranty. Factory direct from China. OEM customization available. |
Technical Specifications
| Parameter | Value |
|---|---|
| Model | FRO-214-0.5T-3S |
| Type | Skid-Mounted RO System (4 Tanks with Softener) |
| Flow Rate | 500 L/H (≈ 12,000 GPD) |
| Desalination Rate | ≥97% |
| Recovery Rate | 50-65% (Adjustable) |
| Membrane | ULP21-4040 × 2 |
| Tank Configuration | Sand Filter + Carbon Filter + Softener + Cartridge Filter (4 tanks) |
| Tank Material | FRP (Fiberglass Reinforced Plastic) |
| Pre-treatment | Sand + Carbon + Softener + Cartridge |
| Voltage | 220V / 50Hz (380V/60Hz optional) |
| Power | 1.5 KW |
| Frame | Steel, Skid-Mounted |
| Dimensions | 1500×630×1750 mm |
| Weight | 270 kg |
| Feed Water Source | Well water, groundwater, borehole water |
| Max Feed Hardness | ≤ 400 mg/L (softened to ≤ 50 mg/L) |
| Max Feed TDS | ≤ 1500 ppm |
| Warranty | 1 Year |
| Certification | CE |
Filtration Process
Raw Water → Sand Filter → Carbon Filter → Softener → Cartridge Filter → High Pressure Pump → RO Membranes (×2) → Pure Water
| Stage | Component | Function |
|---|---|---|
| 1 | Sand Filter | Removes sediment, rust, suspended solids |
| 2 | Carbon Filter | Removes chlorine, odor, organic matter |
| 3 | Softener | Removes calcium & magnesium, prevents RO membrane scaling |
| 4 | Cartridge Filter | 5μm fine filtration, protects RO membranes |
| 5 | RO Membranes (×2) | 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 |
| Softener (FRP + Resin + Brine tank) | 1 |
| Cartridge Filter (20 inch) | 1 |
| RO Housing (FRP / SS) | 2 |
| RO Membrane (ULP21-4040) | 2 |
| High Pressure Pump (1.5KW, 220V) | 1 |
| Steel Frame (Skid-Mounted) | 1 |
| PLC Control Panel | 1 |
| Piping & Fittings | 1 set |
| Pressure Gauges & Flow Meters | 1 set |
| Brine Tank | 1 |
Note: Raw water tank and pure water tank are not included. They can be purchased separately.
Softener Feature: Why It Matters
The Problem
High hardness water (high calcium & magnesium) causes:
- ❌ Scale buildup on RO membranes
- ❌ Reduced water output
- ❌ Frequent cleaning
- ❌ Shortened membrane life
The Solution
Our system includes a built-in water softener:
| Raw Water Hardness | Need Softener? |
|---|---|
| ≤ 100 mg/L | No — standard RO is fine |
| 100 – 300 mg/L | Recommended |
| > 300 mg/L | Strongly Recommended |
Result: Outlet hardness ≤ 50 mg/L · Membrane life extended by 30-50%
Softener Specifications
| Item | Specification |
|---|---|
| Tank Material | FRP |
| Resin Type | Food grade strong acid cation exchange resin |
| Resin Amount | 50L |
| Regeneration | Manual / Automatic (with brine tank) |
| Outlet Hardness | ≤ 50 mg/L |
| Regeneration Cycle | 2-5 days (depending on raw water hardness) |
Key Features
Feature 1: Complete 4-Stage Pre-treatment with Softener
| Tank | Function |
|---|---|
| Sand Filter | Removes sediment, suspended solids |
| Carbon Filter | Removes chlorine, odor, organics |
| Softener | Removes calcium & magnesium — prevents scaling |
| Cartridge Filter | 5μm fine filtration |
Full protection for high hardness well water and groundwater.
Feature 2: Dual ULP21-4040 Membranes
- Two membranes in parallel
- Total membrane area: 14.4 m²
- Desalination rate ≥97%
- Low pressure operation (8-12 bar), energy saving
- 500L/H stable output
Feature 3: 270kg Robust Construction
- Heavy-duty steel frame
- FRP tanks — corrosion-resistant, durable
- Stable operation for 24/7 production
Feature 4: PLC Auto Control
- One-key start
- Auto flush
- Low pressure protection
- Fault alarm display
Applications
| Application | Description |
|---|---|
| 🌍 Rural / High Hardness Areas | Well water & borehole water treatment |
| 🏭 Small Factory | Process water, cleaning water, boiler feed water |
| 🏨 Small Hotel | Guest drinking water, kitchen water, laundry |
| 🏫 Small School | Safe drinking water for students |
| 🏘️ Residential Community | Centralized water supply |
Comparison: With vs Without Softener
| Comparison | Standard 3-Tank RO | This System (4-Tank with Softener) |
|---|---|---|
| Pre-treatment | Sand + Carbon + Cartridge | Sand + Carbon + Softener + Cartridge |
| Hardness removal | No | Yes — removes Ca²⁺, Mg²⁺ |
| Suitable feed water | Tap water, low TDS well water | High hardness well water, groundwater |
| Membrane scaling risk | High (with hard water) | Low |
| Membrane life | 1-1.5 years | 1.5-2 years (30-50% longer) |
FAQ
1. Why do I need a softener?
If your water source is well water, borehole water, or groundwater with high hardness, a softener prevents calcium and magnesium from scaling your RO membranes. This extends membrane life by 30-50% and reduces maintenance.
2. What is the daily output?
500 L/H equals approximately 12,000 gallons per day (about 12 tons), enough for 1,000-1,200 people.
3. What type of water can this system handle?
Well water, borehole water, groundwater with hardness up to 400 mg/L. The softener reduces hardness to ≤ 50 mg/L.
4. How does the softener work?
It uses ion exchange resin to remove calcium and magnesium ions. The resin is regenerated using salt (brine tank) every 2-5 days depending on water hardness.
5. What is the difference between this and the standard 3-tank model?
This model includes a softener (4 tanks total) for high hardness water treatment. The standard 3-tank model (sand + carbon + cartridge) is for tap water or low TDS well water.
6. What is the difference between 250L/H and 500L/H models?
The 500L/H model has double the output (500 vs 250 L/H), dual membranes (2 vs 1), higher power (1.5KW vs 1.1KW), and larger resin amount (50L vs 25L).
7. How long does installation take?
About 4 hours. The system comes pre-assembled — just connect water inlet, drain, and power.
8. 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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