Water Treatment Accessories

RO Membrane Elements

Name: RO Membrane Elements
Brand: Xinnuo Water

Replacement and project membrane elements selected by element size, membrane chemistry, feed salinity, required rejection, pressure-vessel arrangement and system recovery.

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4040 and 8040 RO membrane elements for reverse osmosis system replacement

Quick quotation

Confirm this equipment for your project

Send source water, flow rate, voltage and target quality. We will confirm whether this model fits before quotation.

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Element formats4040 and 8040
Membrane typeThin-film composite polyamide
Nominal diameter4 inch or 8 inch
Nominal length40 inch
Typical applicationBrackish-water and low-pressure RO, selected by model
Reference salt rejectionTypically 99.0-99.7% by membrane model and test condition

Factory direct supply, project configuration, packing and voltage checked before price.

PARAMETERS

Technical Specifications

Parameter	Value
Element formats	4040 and 8040
Membrane type	Thin-film composite polyamide
Nominal diameter	4 inch or 8 inch
Nominal length	40 inch
Typical application	Brackish-water and low-pressure RO, selected by model
Reference salt rejection	Typically 99.0-99.7% by membrane model and test condition
Maximum feed SDI	5
Free chlorine	<0.1 mg/L
Operating pH	Model-specific continuous and cleaning range
Matching data	Existing model, vessel size, array, pressure, feed TDS and quantity

APPLICATIONS

Typical Applications

Application	Where this equipment fits
Application 1	Replacement elements for existing RO skids
Application 2	New commercial and industrial RO systems
Application 3	Brackish-water desalination
Application 4	Low-pressure pure-water production

PROCESS FLOW

Membrane element matching workflow

Membrane elements must be matched to the existing vessel, array, feed composition, operating pressure, recovery and target rejection. A visually similar 4040 or 8040 element is not automatically an equivalent replacement.

4040 commercial RO membrane elements
8040 industrial RO membrane elements
Interconnectors and brine seals
Model and serial identification
Preservation and sealed transport packaging

RO Membrane Elements process flowchart — RO Membrane Elements process route used for engineering discussion before quotation.

WATER TREATMENT PRINCIPLE

Why membrane model matching matters

RO membrane performance is published under specific test conditions. Actual plant flow and rejection change with temperature, salinity, pressure, recovery and fouling.

Replacing one element with an incompatible flow or rejection model can unbalance the pressure vessel and reduce system performance.

WHY THIS ROUTE

Practical advantages for selection

4040 and 8040 project matching
Selection based on operating data rather than appearance
Replacement seals and interconnectors can be supplied together
Supports both maintenance and new-system membrane lists

MODEL RANGE

Available Configurations

Model range	Best fit	Selection note
4040 low-pressure RO element	Commercial and compact industrial systems	Confirm housing length, flow direction and existing model
8040 brackish-water RO element	Industrial RO skids	Confirm array, feed TDS, pressure, recovery and quantity
High-rejection element	Lower permeate conductivity target	Check pump pressure and concentrate flow before substitution

PROJECT OPTIONS

Configuration Options

Equivalent replacement review
Complete train replacement
Interconnectors and seals
Preservation and storage guidance

QUOTE DATA

Before quotation, send these details

Existing membrane brand and full model
4040 or 8040 vessel size
Number of vessels and elements per vessel
Feed TDS, pressure, recovery and permeate conductivity
Required quantity and destination

BUYER QUESTIONS

Questions buyers usually ask before quotation.

Use these checks to decide whether the route is close enough before sending water data.

Can any 8040 membrane replace another 8040 membrane?

No. Size may match, but flow, rejection, pressure rating, chemistry and spacer design can differ.

What photos should be sent?

Send the full membrane label, pressure-vessel label, system nameplate and current operating readings.

Why is the listed rejection a range?

Different membrane models and test conditions have different nominal and minimum rejection values; the project model must be confirmed before quotation.

PRODUCT ROUTE