Polymex BW 4040 RO Membrane
Polymex BW 4040 RO Membrane
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Energy-Efficient Brackish Water RO Membrane for Commercial & Industrial Applications
The Polymex BW 4040 is a high-performance brackish water reverse osmosis membrane designed for commercial and industrial water treatment systems. Engineered for high salt rejection and low operating pressure, this membrane provides reliable water purification with reduced energy consumption while maintaining stable permeate quality.
Suitable for industrial RO plants, commercial drinking water systems, wastewater treatment, boiler feed applications, and brackish water desalination systems.
🫗 Quick Highlights
- 4040 commercial RO membrane module
- High salt rejection up to 99.5%
- 2500 GPD permeate flow capacity
- Low operating pressure design
- Energy-efficient membrane technology
- Improved fouling resistance with thicker feed spacer
- Suitable for brackish water desalination
- Compatible with standard 4-inch pressure vessels
- Reliable industrial-grade performance
- Ideal for commercial and industrial RO systems
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- Low pH
- Non Hazardous
- GST Invoice Available

💧 Key Benefits
- Low energy consumption
- High salt rejection performance
- High permeate flow rate
- Improved fouling resistance due to thicker feed spacer
- Stable and consistent membrane performance
- Cost-effective operation
📌 Technical Properties
- Brand: Polymex
- Model: BW 4040
- Membrane Type: Brackish Water RO Membrane
- Permeate Flow Rate: 2500 GPD (9.4 m³/day)
- Stable Salt Rejection: 99.50%
- Minimum Salt Rejection: 99.30%
- Membrane Area: 90 ft² (8.36 m²)
- Feed Spacer Thickness: 32 mil
- Maximum Operating Pressure: 600 psi (41 kg/cm²)
- Maximum Operating Temperature: 45°C (113°F)
- Maximum Element Pressure Drop: 15 psi (1 kg/cm²)
- Continuous pH Range: 2 – 11
- Short-Term Cleaning pH Range: 1 – 13
- Maximum Feed SDI (SDI15): 5.0
- Free Chlorine Tolerance: < 0.1 ppm
- Operating Pressure (Testing): 225 psi (15 kg/cm²)
- Testing Solution: 2000 ppm NaCl
- Testing Temperature: 25°C ± 2°C
- Testing pH: 8.0 ± 0.5
- Recovery Rate: 15%
📏 Dimensions
- Length A: 40.0 inch (1016 mm)
- Length B: 1.04 inch (26.5 mm)
- Length C: 0.75 inch (19.1 mm)
- Length D: 3.9 inch (99 mm)
- Element Type: Standard 4040 Membrane
🌊 Applications
- Commercial RO Plants
- Industrial Water Treatment
- Brackish Water Desalination
- Drinking Water Systems
- Boiler Feed Water Treatment
- Oil & Petrochemical Wastewater Treatment
- Thermal Power Plant Feed Water
- Near-Zero Discharge Applications
- Small Capacity Commercial Water Systems
📋 Operating Guidelines
- Maintain feed SDI within recommended limits
- Remove chlorine before membrane exposure
- Use proper pretreatment to prevent fouling
- Operate within specified pressure and temperature limits
- Perform regular membrane cleaning when required
- Avoid membrane drying during storage or shutdown
💭 Reasons to choose
The Polymex BW 4040 membrane offers an ideal combination of energy efficiency, high rejection, and stable permeate flow, making it a cost-effective solution for commercial and industrial RO systems. Its low-pressure operation helps reduce operating costs without compromising water quality.
FREQUENTLY ASKED QUESTIONS
Do you provide installation services?
Yes. We install RO plants, softeners, iron removal filters, ETP/STP systems, and all types of domestic & industrial water treatment plants across India.
Do you offer GST invoices?
Yes. Every order comes with a100% GST-compliant invoice, suitable for dealers, resellers, and industrial use.
How do I know which chemical or filter is suitable for my water?
You can share your raw water report, TDS, or problem description. Our technical team will recommend the correct chemical, membrane, filter media, or system.
Please connect with us from Contact Us.
Can I speak to someone before placing an order?
Yes, you can contact us directly via phone, email, or WhatsApp for product guidance or bulk pricing.