High-Flow PP Filter Cartridges (152mm/165mm)

// MODULE-02 / PROCUREMENT STRATEGY

The High-Low Matrix.

Whether you are upgrading a mega-desalination plant to High-Flow technology, or procuring bulk standard filters for legacy systems, we are your direct-source manufacturer.

The OPEX Killer

High-Flow Pleated Series

For modern large-scale RO plants. A single 40-inch High-Flow cartridge replaces up to twenty standard 2.5-inch filters. Features advanced pleated polypropylene media for massive dirt-holding capacity. 100% drop-in replacements for Pall® and 3M® housings.

152mm (Pall Eq.) 165mm (3M Eq.)

Bulk Commodity

Standard Melt-Blown Series

The industry standard for legacy multi-cartridge housings. Manufactured via continuous melt-blowing process without any chemical binders. We offer extreme wholesale pricing for FCL (Full Container Load) bulk orders.

2.5" Standard 4.5" Big Blue

// MODULE-03 / SPECIFICATION MATRIX

Universal Housing Compatibility.

Stop paying premium brand markups. Our OEM cartridges are dimensionally identical to global Tier-1 housings.

High-Flow (Pleated) Replacement Targets

DATA SOURCE: OEM TECHNICAL BULLETINS

Flow Direction	Outer Diameter	Global Target Brand	WANDONG OEM Equivalent
Inside-Out Flow Contaminants trapped inside	152 mm (6.0 inch)	Pall® Ultipleat High Flow	WD-HF-152 Series MATCH
Outside-In Flow Contaminants trapped outside	165 mm (6.5 inch)	3M® High Flow	WD-HF-165 Series MATCH

Standard Melt-Blown (Depth) Targets

Format	Outer Diameter	Inner Diameter	WANDONG OEM Series
Standard Slim Multi-Cartridge Housings	63 mm (2.5 inch)	28 mm / 30 mm	WD-MB-63
Big Blue (BB) High Capacity Housings	114 mm (4.5 inch)	28 mm / 30 mm	WD-MB-114 (BB)

WANDONG OEM Verified Parameters

Series	Filter Media	Available Lengths	Micron Ratings (µm)	Max Flow Rate (per 40")
WD-HF-152	Pleated PP / Glass Fiber	20", 40", 60"	1, 5, 10, 20, 50	70 m³/h (300 GPM)
WD-HF-165	Pleated PP	20", 40", 60"	1, 5, 10, 20, 50	80 m³/h (350 GPM)
WD-MB-63	Melt-Blown PP	10", 20", 30", 40"	1, 5, 10, 20, 50	3.6 m³/h (15 GPM)

// MODULE-04 / MECHANICAL COMPATIBILITY

Seamless Housing Retrofits.

WANDONG High-Flow cartridges are engineered with exact dimensional tolerances to match global Tier-1 housings. Whether you use Pall® Ultipleat (Inside-Out) or 3M® High Flow (Outside-In), our elements slide in perfectly with identical O-ring seals and locking mechanisms.

Physical Specifications (High-Flow)

Outer Diameter

152 mm (6") / 165 mm (6.5")

Standard Lengths

20", 40", 60"

End-Cap Configuration

SOE with O-ring / Twist-Lock

O-Ring Materials

EPDM / Silicone / Viton

152mm Pall® Equivalent OD

165mm 3M® Equivalent OD

60inch Max Available Length

HIGH-FLOW ELEMENT

L: 20" / 40" / 60"

OD: 152 / 165 mm

// MODULE-05 / ENGINEERING ANATOMY

Deconstructing the High-Flow Core.

How does one cartridge replace twenty? It's all about surface area and flow dynamics. Explore the architecture that makes High-Flow the undisputed king of RO pre-filtration.

3D Cross-Section of High-Flow Pleated PP Filter Cartridge

Pleated Architecture

1. Deep Pleated PP Media

Unlike solid melt-blown filters, High-Flow cartridges utilize a crescent-shaped pleated geometry. This maximizes the effective filtration surface area within the 6-inch diameter, allowing for massive dirt-holding capacity and ultra-low pressure drop.

2. Inside-Out Flow Path (152mm Series)

Raw water enters the center core and flows outward. All suspended solids, colloidal particles, and fine silt are trapped inside the cartridge. When it's time for replacement, the contaminants are removed with the filter, ensuring zero bypass into the clean housing.

3. Heavy-Duty Outer Cage

Constructed from high-strength polypropylene. The rigid outer cage prevents the pleated media from deforming or blowing out under high differential pressure surges during RO high-pressure pump startup.

4. O-Ring Sealing

Features a single open end (SOE) with a robust EPDM or Silicone O-ring. This fail-safe seal eliminates the bypass risks associated with stacking multiple Double Open End (DOE) melt-blown filters.

// MODULE-06 / OPERATING LIMITS

Operating Parameters.

Strict adherence to these limits ensures maximum dirt-holding capacity and protects downstream RO membranes.

Maximum Operating Temperature	80°C (176°F) for PP media
Max Differential Pressure (Forward)	3.4 bar at 82°C
Recommended Change-out dP	2.4 bar (35 psid) at 20°C
Operating pH Range	1 - 13 (Excellent Chemical Compatibility)
O-Ring / Gasket Materials	EPDM, Silicone, Viton (Optional)
Filter Media	Polypropylene (PP) / Glass Fiber
Support / Drainage Layer	Polypropylene

End-Cap Configurations

Pall Equivalent: Single Open End (SOE) with handle, O-ring seal.
3M Equivalent: Single Open End (SOE) with twist-to-lock mechanism.
Melt-Blown: Double Open End (DOE) flat gasket, or 222/226 O-rings.

Change-out Protocol

To prevent RO membrane fouling, cartridges must be replaced strictly based on differential pressure (dP), not time.

1. Monitor dP: Replace cartridges when pressure drop across the housing reaches 2.4 bar (35 psi).
2. Never Wash: Pleated and melt-blown PP cartridges are disposable depth filters. Attempting to wash and reuse them will destroy the pore structure and cause immediate bypass.

Process Engineer's Note: The Particle Unloading Risk

Never push a PP filter beyond its recommended change-out differential pressure (2.4 bar / 35 psid). Exceeding this limit causes "particle unloading"—where previously trapped contaminants are forced through the media by extreme pressure, instantly blinding your expensive downstream RO membranes. Filters are cheap; RO membranes are not.

// MODULE-07 / SELECTION GUIDE

Housing-Based Selection.

Select your replacement cartridge based on your existing filter housing architecture and flow requirements.

152 mm OD

Inside-Out Flow

Pall® Ultipleat Equivalent

Direct drop-in for Pall High Flow housings. Traps dirt inside the cartridge for cleaner change-outs.

WD-HF-152 Series

165 mm OD

Outside-In Flow

3M® High Flow Equivalent

Direct drop-in for 3M housings. Features a twist-to-lock mechanism and massive outside surface area.

Currently Viewing

2.5 inch OD

Standard Melt-Blown

Legacy Multi-Housing

The industry standard for legacy systems. Available in bulk FCL quantities for extreme wholesale pricing.

WD-MB-63 Series

// MODULE-08 / APPLICATION SCENARIOS

Protecting Critical Assets.

From mega-desalination plants to microelectronics. Our cartridges are the final physical barrier before expensive RO membranes and sensitive industrial processes.

SWRO Desalination Plant High-Flow Pre-filtration

SWRO Pre-filtration

High-Flow cartridges handle massive seawater intakes, reducing footprint by 50%.

Power Plant Boiler Feed Water Filtration

Power Generation

Condensate polishing and boiler feed water purification at high temperatures.

Food and Beverage Brewery Process Water Filtration

Food & Beverage

FDA-compliant materials for bottled water, juices, and brewery process water.

Chemical Processing Plant Water Filtration

Chemical & Petrochemical

Excellent chemical compatibility for filtering solvents, acids, and oilfield injection water.

// MODULE-09 / FACTORY & INVENTORY

Massive Production.
Wholesale Pricing.

Filter cartridges are high-frequency consumables. You need a reliable source that can deliver consistent quality at scale. WANDONG operates automated pleating and melt-blowing lines, allowing us to offer unbeatable FCL (Full Container Load) pricing.

Automated Pleating & Thermal Welding

No Chemical Binders or Adhesives

FCL Container Direct Shipping

Automated Pleating Machine for High-Flow RO Filters

Massive Warehouse Stock of Filter Cartridges Ready for FCL Shipping

Melt-Blown PP Filter Cartridge Production Line

// MODULE-10 / PROVEN IN THE FIELD

Powered by WANDONG.

We don't just sell components; we build the heavy-duty systems that rely on them. Our High-Flow cartridges are the primary security barrier in our own SWRO pre-treatment skids deployed globally.

The Integrator's Advantage

Because we use these exact filters in our own $500,000+ EPC projects to protect our expensive RO membranes, they undergo rigorous internal quality control that pure trading companies simply cannot match.

WANDONG SWRO Pre-treatment Skid with High-Flow Filter Housings

FIELD DEPLOYMENT

WANDONG Pre-treatment Skid

Showcasing the multi-cartridge High-Flow stainless steel housings.

// MODULE-11 / THE ENGINEER'S UNBOXING

Built for the Field.
Delivered with Certainty.

We deliver a risk-free deployment experience engineered for remote sites and harsh environments.

Industrial-Grade Traceability

High-contrast waterproof labels with exact specs, micron ratings, and batch numbers. Matched to our OEM database to eliminate gray-market risks. No guessing for your field team.

QC Certificate Inside

Open the box and find the hardcopy QC Pass Certificate right on top. Out-of-the-box trust that guarantees the integrity of the pleated media before installation.

Export-Grade Preservation

Every single High-Flow cartridge is individually shrink-wrapped in heavy-duty plastic to prevent contamination, then packed in rigid corrugated export cartons engineered to resist global transit.

// MODULE-12 / 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 High-Flow Carton (40")

Dimensions (L×W×H)

~1050 × 170 × 170 mm

Gross Weight

~3.5 kg (7.7 lbs)

Net Weight

~3.0 kg (6.6 lbs)

Packaging

Individually Wrapped

* Values are approximations for a single 40-inch High-Flow element.

Standard Pallet

~40 pcs

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

40ft Container

~800 pcs

FCL Loading Capacity (High-Flow 40")

// MODULE-13 / GLOBAL O&M SUPPORT

Direct Access to Senior Process Engineers.

Filter change-outs dictate your plant's uptime. Our clients get direct WhatsApp and Email access to our senior engineers for differential pressure (dP) optimization, housing troubleshooting, and maintenance scheduling.

dP Optimization Housing Support 24/7 Standby

Chat with Engineer Email Support Desk

// MODULE-14 / TECHNICAL FAQ

Hardcore FAQ.
Engineering-Grade Answers.

Why should I upgrade my plant to High-Flow cartridges?

It's all about reducing OPEX and downtime.

A standard 40-inch melt-blown filter handles about 3.6 m³/h. A single 40-inch High-Flow cartridge handles up to 70 m³/h.
If your plant needs 350 m³/h of flow, you would need to install and maintain 100 standard filters. With High-Flow, you only need 5 cartridges. This reduces your housing footprint by 50%, and cuts filter replacement labor time from hours down to minutes.

Are your High-Flow cartridges compatible with Pall® and 3M® housings?

Yes. Our WD-HF-152 series is a 100% dimensional drop-in replacement for Pall® Ultipleat (Inside-Out flow, 152mm OD). Our WD-HF-165 series is a direct replacement for 3M® High Flow (Outside-In flow, 165mm OD). They feature the exact same end-cap locking mechanisms and O-ring seals.

Should I choose 1 micron or 5 micron for RO pre-filtration?

5 micron is the industry standard for RO security filtration. It effectively blocks large particles that could physically damage the RO membrane surface, while maintaining an acceptable pressure drop.

1 micron is used in highly sensitive applications (like microelectronics or specific chemical processes) where finer colloidal interception is required before the RO, though it will require more frequent change-outs.

Can I wash and reuse these filter cartridges?

No. Both pleated High-Flow and melt-blown PP cartridges are disposable depth filters. Attempting to wash them with high-pressure water or chemicals will destroy the microscopic pore structure, leading to immediate particle bypass and severe fouling of your expensive downstream RO membranes.

How do you guarantee the absolute micron rating of your cartridges?

We don't guess. Our ISO 9001 facility utilizes Multi-Pass Testing and laser particle counters to verify the absolute retention efficiency of our pleated media. A 5-micron WANDONG filter guarantees >99% removal of all particles 5 microns and larger, ensuring absolute protection for your RO system.

What is the lead time for a 40ft container (FCL) of High-Flow filters?

Thanks to our fully automated pleating and thermal welding lines, we can produce and dispatch a full 40'HQ container of standard High-Flow or Melt-Blown cartridges within 14 to 21 days. We offer significant wholesale discounts for FCL orders.

// MODULE-15 / INITIATE PROTOCOL

YOUR 50,000m²
OEM SUPPLY BACKEND.

Stop paying premium brand markups for high-frequency consumables. Whether you need a pallet of High-Flow replacements or a 40ft container of standard melt-blown filters, we provide factory-direct wholesale pricing.

1h

INITIAL RESPONSE

FCL

WHOLESALE PRICING

$0

CONSULTATION FEE

// SECURE YOUR SUPPLY CHAIN

Request Bulk Pricing

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Target Product *

Estimated Quantity *

Length

Micron Rating

Notes & Destination Port

AVG. RESPONSE: < 4 HRS · B2B ONLY

Stop Changing 100 Filters. Change 5.