Document type: product selection information. The illustrations on this page are AI-generated diagrams, not project photographs or specific models offered for supply.
Check the complete model and compatibility before reading performance data with its test conditions. Use one record for purchasing, replacement and handover to reduce mismatches caused by similar appearances.
First confirm what is being purchased
Check RO membrane elements, pretreatment cartridges, seals and connectors separately. “Suitable for water-treatment equipment” is not a sufficient compatibility finding. Provide the original model, filter or membrane housing details, photographs of ends and seals, and service conditions to help identify the corresponding replacement.
This information does not mean that GUDIAN Water sells a particular manufacturer’s model, holds authorised-distributor status or has stock. Availability and source documents must be verified in this enquiry.
How to read manufacturer parameters: one public example only
The table below illustrates how to read publicly available official DuPont information. It is not a GUDIAN Water supply list or a statement of complete-system performance. The referenced document is 45-D03970-en Rev.5, 2024-10; check the applicable sales specifications again when purchasing.
| Item to read | Manufacturer document example | How to interpret it |
|---|---|---|
| Element model | FilmTec BW30 PRO-4040 | Use the complete model to locate documents; “4040” alone does not establish interchangeability |
| Typical permeate flow | 2600 US gpd; rounded to 9.8m³/d in the document | A typical value for one element under specified test conditions |
| Salt rejection | Stabilised 99.7%, minimum 99.5% | Read together with the corresponding test conditions |
| Test water and pressure | NaCl 2000ppm; 225psi (15.5bar) | Not uniform operating settings for every system |
| Other test conditions | 25℃, pH8, single-element recovery 15% | Do not apply directly to arbitrary feedwater or complete systems |
The above values and conditions come from the same official document.[R5] It also explains individual flow variation and possible revisions to sales specifications. Quotations should match current supply documents. Multiplying individual-element test flows does not create an unconditional output guarantee for a complete system.
Compatibility information for cartridges and accessories
| Item | What to check | Records to keep |
|---|---|---|
| Membrane elements | Complete model, membrane housing, connections, seals and applicable operating conditions | Labels, supply documents and batch |
| Pretreatment cartridges | Length, ends, seals, material, filtration rating and its notation | Original model and corresponding instructions |
| Seals and connectors | Dimensions, material, structure and relationship to the original assembly | Position photographs, original-part markings or drawings |
| Replacement service | Equipment procedures, return-to-use requirements and handover scope | Replacement records and initial operating data |
Record delivery and post-replacement conditions separately
On receipt, check packaging, model, quantity, batch and accompanying documents. Follow actual product instructions for storage and transport. Confirm compatibility between equipment and new parts again before installation.
After replacement, retain the date, model and batch, together with relevant flow, pressure, water-temperature and conductivity records when operation resumes. Assess shelf life, maintenance and replacement intervals using specific documents and actual condition; a fixed number of months is not a universal consumable lifetime.
Frequently asked questions
Does 9.8m³/d mean the complete system can be promised to produce a steady 9.8 tonnes a day?
No. The example is a typical single-element flow under specific test conditions. Complete-system capacity must be established from actual configuration, feedwater, conditions and operating time.
Does the DuPont example mean GUDIAN Water is an authorised distributor?
No. It only explains how to read public technical information. Actual brand, source of supply, authorisation, stock and sales specifications require separate verification.
Can consumables all be replaced every six months or every year?
A fixed number of months cannot define the lifetime of every product. Assess using the relevant instructions, feedwater, usage, and operating and maintenance records.
Related information and enquiries
Consumable replacement: check before ordering · Contact GUDIAN Water to discuss this requirement
Technical references
R5 · FilmTec BW30 PRO-4040 & BW30 PRO-2540 Element — Product Data Sheet. Used to demonstrate how to read manufacturer parameters. It does not mean GUDIAN Water sells this model, is authorised, holds stock, or guarantees the same output or salt rejection for a complete system. The test pressure is not treated as an operating setting for every system.
References checked: 2026-10-25. Application plans and manufacturer references help organise requirements; actual supply, models, delivery and acceptance must be confirmed against the documents for this order.
Related illustrated information in this batch: Consumable replacement: check before ordering. Earlier information: View the original product or guide.
