Fouling-Resistant (FR) RO Membrane Elements (34-mil)

// MODULE-02 / PROCUREMENT STRATEGY

Dual-Track Procurement.
Zero Compromise.

As a global turnkey integrator, we understand that every project has different CapEx limits. We offer two distinct procurement tracks to secure your supply chain.

Zero-Tolerance Projects

100% Genuine Tier-1 Brands

For critical infrastructure and zero-tolerance environments where brand specification is mandatory. We leverage our massive integrator purchasing power to supply factory-fresh elements directly from global warehouses.

DuPont™ Toray® Hydranautics® SUEZ® LG Chem

CapEx Optimization

WANDONG OEM Equivalents

For industrial wastewater reuse and landfill leachate pre-treatment. Achieve 100% of Tier-1 performance at 60% of the cost. Utilizing identical 34-mil LDP spacers and hydrophilic coatings designed for severe fouling conditions.

WANDONG MEMBRANE

// MODULE-03 / SPECIFICATION MATRIX

Universal 8040 Compatibility.

Standardized testing conditions per ASTM D4516. Data represents typical values for WANDONG OEM equivalents.

WANDONG Nomenclature

WD

+

FR

+

400

Drop-In Replacement Targets

DATA SOURCE: OEM TECHNICAL BULLETINS

Application Class	DuPont FilmTec™ Target	Hydranautics® / SUEZ® Target	WANDONG OEM Equivalent
Standard Fouling-Resistant 34-mil Spacer (225 PSI)	BW30XFR-400/34	PROC10 / AG-400 FR	WD-FR-400 MATCH
Low-Energy FR 34-mil Spacer (150 PSI)	BW30XFRLE-400/34	PROC10 LE / LFC3-LD	WD-FR-400LE MATCH
Extreme Fouling-Resistant 34-mil + High Chemical Tolerance	Fortilife CR50	-	WD-FR-365 MATCH ZLD OPTION Extreme Conditions: Designed for Zero Liquid Discharge (ZLD) systems. Trades active area (365 ft²) for maximum chemical durability and cleanability in the harshest effluents.

WANDONG OEM Verified Parameters

Model	Active Area ft² (m²)	Permeate Flow GPD (m³/d)	Nominal Rejection	Spacer Thickness (mil)	Test Pressure PSI (MPa)
WD-FR-400	400 (37.2)	10,500 (39.7)	99.5%	34-LDP	225 (1.55)
WD-FR-400LE	400 (37.2)	11,500 (43.5)	99.3%	34-LDP	150 (1.03)
WD-FR-365	365 (34.0)	10,000 (37.9)	99.5%	34-LDP	225 (1.55)

* Standard Test Conditions: 2000 mg/L NaCl, 15% Recovery, 77°F (25°C), pH 8.
* Performance Disclaimer: Data represents typical values and does not constitute a guaranteed minimum. Flow rates for individual elements may vary but will be no more than 15% below the value shown.

Process Engineer's Note: The 34-mil Advantage

In high-COD wastewater applications, standard 28-mil spacers trap colloidal particles and biomass, leading to exponential pressure drop (dP) increases. The 34-mil Low Differential Pressure (LDP) spacer maintains turbulent cross-flow, sweeping foulants away from the membrane surface and extending CIP intervals by up to 50%.

// MODULE-04 / MECHANICAL COMPATIBILITY

100% Drop-In Ready.

No retrofitting required. WANDONG OEM 8040 elements adhere strictly to the global dimensional standard. They slide perfectly into any standard 8.0" FRP pressure vessel (e.g., Codeline, Protec, ROPV) utilizing your existing Anti-Telescoping Devices (ATDs) and interconnectors.

Physical Specifications

Element Wet Weight

16.0 kg (35.2 lbs)

Permeate Tube Extension

1.125 inch (28.6 mm) ID

Outer Wrap

Fiberglass Reinforced

Membrane Type

Polyamide Thin-Film Composite

40.0" Standard Length

7.9" Outer Diameter

1.125" Permeate Tube ID

8040 ELEMENT

A: 40.0" (1016 mm)

B: 7.9" (201 mm)

// MODULE-05 / ENGINEERING ANATOMY

Deconstructing the Anti-Fouling Core.

Wastewater reuse destroys standard RO membranes within weeks. Explore the specialized architecture designed to repel organics and survive aggressive chemical cleaning.

34-mil Wide Feed Spacer in Fouling Resistant RO Membrane

34-mil Spacer + Hydrophilic Coating

1. Hydrophilic Surface Modification

Standard polyamide is naturally hydrophobic, which attracts organic foulants (like oils and proteins). Our FR series applies a proprietary hydrophilic coating to the active layer, creating a microscopic water barrier that prevents organics from adhering to the membrane.

2. 34-mil Advanced LDP Feed Spacer

The physical defense line. By increasing the spacer thickness from 28-mil to 34-mil, we significantly reduce the pressure drop across the element and allow larger colloidal particles to pass through without getting trapped in the mesh.

3. Polysulfone Microporous Support

Engineered to withstand 600 PSI of continuous compaction. Tolerates aggressive Clean-In-Place (CIP) protocols across a massive pH 1-13 range without degrading.

4. Interlocking ATD (End-Cap)

Eliminates traditional O-ring extrusion risks. The Anti-Telescoping Device prevents permeate contamination even under pressure surges typical in industrial plant startup sequences.

// MODULE-06 / OPERATING LIMITS

Comprehensive Operating Limits.

Strict adherence to these parameters ensures optimal performance and validates the 12-month limited warranty.

Membrane Type	Polyamide Thin-Film Composite (Hydrophilic)
Maximum Operating Temperature	113°F (45°C)
Maximum Operating Pressure	600 psi (41 bar)
Max Pressure Drop (Single Element)	15 psi (1.0 bar)
Max Pressure Drop (Pressure Vessel)	50 psi (3.5 bar)
pH Range, Continuous Operation	2 - 11
pH Range, Short-Term Cleaning (30 min)	1 - 13
Maximum Feed Flow Rate	75 gpm (17 m³/h)
Maximum Feed Silt Density Index (SDI)	SDI 5
Free Chlorine Tolerance	< 0.1 ppm

General Handling & Preservation

Keep elements moist at all times after initial wetting.
To prevent biological growth during prolonged system shutdowns, immerse elements in a preservative solution (e.g., 1% SMBS).
Avoid static permeate-side backpressure at all times.

System Startup Protocol

To prevent hydraulic shock and membrane damage during initial startup, shutdown, or cleaning, strict adherence to the following sequence is mandatory:

0. Pre-treatment Verification: Ensure all upstream UF or multi-media filters are fully commissioned before loading RO elements.
1. Feed pressure should be increased gradually over a 30-60 second timeframe.
2. Permeate obtained from the first hour of operation must be discarded.

// MODULE-08 / SELECTION GUIDE

TDS-Based Element Selection.

Selecting the correct membrane series based on feed water Total Dissolved Solids (TDS) and fouling potential is critical for minimizing OPEX.

TDS < 2,000 ppm

Tap Water / Light Brackish

ULP Series (Ultra-Low Pressure)

Operates at an extremely low 150 PSI, drastically reducing electrical OPEX while maintaining 99.0% rejection. Ideal for municipal purification.

View ULP Elements

High COD/BOD

Wastewater Reuse / ZLD

FR Series (Fouling-Resistant)

The ultimate solution for high-fouling effluents. 34-mil spacer and hydrophilic coating prevent biological growth and extend CIP intervals.

Currently Viewing

TDS > 10,000 ppm

Seawater / High Salinity

SWRO Series (Seawater RO)

Engineered for extreme conditions. Withstands up to 1200 PSI to overcome massive osmotic pressure, delivering 99.8% rejection.

View SWRO Elements

// MODULE-09 / APPLICATION SCENARIOS

Conquer the Toughest Effluents.

Where standard BWRO elements clog and fail within weeks, our FR series thrives. Designed specifically for high-organic and high-biological fouling environments.

Textile and Dyeing Wastewater Treatment Plant with FR RO Membranes

Textile & Dyeing

Resists colorants and organic surfactants, enabling 80%+ water recovery in textile mills.

Landfill Leachate Treatment Plant using FR RO Elements

Leachate Polishing

Deployed downstream of MBR/UF systems to polish highly toxic landfill leachate.

Chemical and Petrochemical ZLD Wastewater Treatment

Chemical Effluent

High chemical tolerance for aggressive CIP cleaning in petrochemical ZLD processes.

Municipal Wastewater Reuse Facility with FR Membranes

Municipal Reuse

Upgrading secondary effluent to ultra-pure standards for industrial park supply.

// MODULE-10 / FACTORY & INVENTORY

Massive Inventory.
Global Dispatch.

We are not a trading company. WANDONG ENVIRO operates a heavy-duty manufacturing base and maintains a massive inventory of both Tier-1 (DuPont/Toray) and OEM elements. When your plant faces a critical shutdown, we execute emergency air-freight dispatches within 48 hours.

ISO 9001 & ISO 14001 Certified Facility

10,000+ Elements in Standing Stock

VIP Wholesale Rates with DHL/FedEx

Automated RO Membrane Rolling Production Line

Massive Warehouse Stock of 8040 RO Membranes

RO Membrane Quality Control and Vacuum Testing

// MODULE-11 / PROVEN IN THE FIELD

Powered by WANDONG.

We don't just sell components; we build the heavy-duty systems that rely on them. Our FR elements are the beating heart of our own containerized Wastewater Reuse and ZLD plants deployed across the globe.

The Integrator's Advantage

Because we use these exact membranes in our own $500,000+ EPC projects, they undergo rigorous internal quality control that pure trading companies simply cannot match. We stake our entire plant's performance on these elements.

WANDONG Wastewater Reuse RO Skid with 8040 FRP Pressure Vessels

FIELD DEPLOYMENT

WANDONG Turnkey Reuse Skid

Showcasing the 8040 FRP pressure vessels loaded with our FR membranes.

// MODULE-12 / THE ENGINEER'S UNBOXING

Built for the Field.
Delivered with Certainty.

We don't just ship a plastic tube. We deliver a risk-free deployment experience engineered for remote sites and harsh environments.

Industrial-Grade Traceability

High-contrast waterproof labels with exact specs, batch numbers, and a unique serial number (S/N). Matched to our OEM database to eliminate gray-market risks. No guessing for your field team.

QC Certificate & Guide Inside

Open the box and find the hardcopy QC Pass Certificate and CIP cleaning guide right on top. Out-of-the-box trust that saves your engineers from digging through email threads.

Export-Grade Preservation

Vacuum-sealed in heavy-duty moisture-barrier foil with a 1% Sodium Metabisulfite (SMBS) preservative solution, encased within rigid telescopic cartons. Engineered to resist harsh global transit, ensuring a secure 12-month shelf life under proper storage.

// MODULE-13 / LOGISTICS MATRIX

Optimized for Global Transit.

We speak the language of freight forwarders. CBM optimized for both rapid air-freight and mass FCL sea-freight.

Single 8040 Carton

Dimensions (L×W×H)

~1050 × 220 × 220 mm

Gross Weight

~16.5 kg (36.3 lbs)

Net Weight

~14.5 kg (31.9 lbs)

Volumetric Weight

~10.16 kg (Air-Freight)

* Values are industry-standard approximations including heavy-duty export packaging.

Standard Pallet

25 pcs

EUR Pallet (1.2x1.0m), Shrink-wrapped

20ft Container

400 pcs

FCL Loading Capacity (16 Pallets)

// MODULE-14 / GLOBAL O&M SUPPORT

Direct Access to Senior Process Engineers.

Don't let improper CIP protocols destroy your new elements. Our clients get direct WhatsApp and Email access to our senior engineers for fouling diagnostics, acid/alkaline cleaning formulas, and step-by-step replacement guidance.

CIP Formulas Fouling Diagnostics 24/7 Standby

Chat with Engineer Email Support Desk

// MODULE-15 / TECHNICAL FAQ & WARRANTY

Hardcore FAQ.
Engineering-Grade Answers.

What makes the FR series different from standard BW elements?

Two critical differences:

1. 34-mil LDP Spacer: Standard BW uses a 28-mil spacer which easily clogs with organics. The 34-mil spacer creates a wider channel, reducing pressure drop and preventing biological buildup.
2. Hydrophilic Coating: The membrane surface is chemically modified to repel organic foulants (like oils and proteins), making it significantly easier to clean during CIP.

Is WD-FR-400 a direct replacement for DuPont Fortilife or BW30XFR?

Yes. Our WD-FR-400 is engineered as a 100% drop-in replacement for DuPont FilmTec™ BW30XFR-400/34i and Hydranautics PROC10. It utilizes the exact same 34-mil feed spacer and 400 ft² active area, delivering equivalent anti-fouling performance and 99.5% salt rejection at a fraction of the CapEx.

What is your warranty policy for OEM elements?

We provide a strict 12-Month Limited Warranty against manufacturing defects. The warranty is voided if failure is caused by improper pre-treatment (Feed SDI > 5), exposure to oxidative chemicals (Free Chlorine > 0.1ppm), or operation beyond the 600 PSI limit.

My system is down. How fast can you ship via air-freight?

For standard 8040 elements in stock, we execute emergency DHL/FedEx dispatches within 48 hours. Elements typically arrive globally in 3-7 days, enabling factory operators to immediately restore their core production lines.

How often should I perform CIP cleaning on FR elements?

CIP frequency depends entirely on your feed water quality. However, as a general rule, you should initiate CIP when normalized permeate flow drops by 10-15%, or when normalized pressure drop increases by 15%. Thanks to the 34-mil spacer, FR elements typically extend the time between CIPs by 2x to 3x compared to standard BW elements.

How do you guarantee the quality of your OEM membranes before shipping?

Every single WANDONG OEM element undergoes rigorous testing at our 50,000m² ISO 9001 facility. We perform 100% vacuum decay testing for mechanical integrity and batch-test performance (salt rejection and flow rate) according to ASTM D4516 standards. A formal QC certificate is included in every box.

Direct-Source Factory

Bypass the Middlemen.
Tap into the Source.

Secure your global supply chain with factory-direct economics. Whether you need a single emergency pallet or a 20ft container for a mega-plant, our engineers will provide a precise drop-in replacement proposal within 1 hour.

50,000m² Manufacturing Base

100% in-house fabrication. FAT (Factory Acceptance Test) available via live video before shipping.

Strict NDA Protection

Your project data and client information are strictly confidential. We act as your silent backend.

// INITIATE PROTOCOL

Request Dispatch & Pricing

Work Email *

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Target Part Number *

Quantity *

Raw Water Report or Old Specs (Optional)

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Notes & Destination Zip Code

Conquer Bio-Fouling. 34-mil FR Elements.

Dual-Track Procurement.Zero Compromise.