Clear ultrafiltration filtrate does not establish that every module and connection is intact. An integrity check should identify the membrane group, test method, conditions and response to an abnormal result.
The distinction in the official manual
Version 8 of DuPont’s IntegraTec UF manual, dated April 2026, distinguishes indirect monitoring such as turbidity or particle counts from direct integrity tests such as pressure decay. They provide different evidence. Test conditions and acceptance criteria must match the actual membrane system.
Records to retain at handover
| Stage | Record | Question for the operator |
|---|---|---|
| Before testing | Module model, group ID, method and applicable document version | Do these criteria apply to this membrane system? |
| During testing | System state, measuring points, instruments and original readings | Are the test conditions traceable? |
| Abnormal result | Affected group, isolation record and responsible person’s assessment | Could this be an instrument or connection issue, and what evidence is still needed? |
| After corrective work | Work performed and repeat-check records | Was the result checked by the same method, rather than appearance alone? |
Separate UF maintenance from RO feedwater acceptance
Request UF maintenance documents and downstream RO feedwater checks separately. “UF installed” describes a configuration. Whether the water meets the selected RO requirements must be answered by appropriate testing and design checks. A photograph cannot replace either handover task.
Frequently asked questions
Can a webpage give a universal test pressure and passing limit? No. The actual model manual and the responsible system party should specify the procedure and limits. This article provides an information checklist.
What helps with a remote enquiry about an abnormal result? Provide the group ID, time, test method and records before and after corrective work. If water-supply safety is affected, follow the site response plan.
References and scope
References checked on 9 October 2026. These are public reference materials. Gudian prepared the information checklists for project enquiries. A supplier manual does not establish a brand authorization for this website, and a paper does not show that Gudian equipment has achieved its research results.
- DuPont IntegraTec Ultrafiltration Process and Design Manual; Version 8, April 2026. For the UF series covered by this manual; integrity-test and cleaning limits remain model-specific.
Further preparation
Equipment and consumable requirements can first be discussed remotely. Supply, installation and site visits are confirmed for each project. Send only the equipment and water-quality information needed for the enquiry, and conceal personal contact details and sensitive third-party information in photographs.