Process & filtration objectives
Filtration in wet cleaning, etching and stripping manages liquid particles alongside the chemical process. Bath composition, concentration and temperature vary widely; a chemically resistant membrane does not automatically suit every bath.
The complete wetted path includes the membrane, support, housing, end caps, seals and connectors. Locate recirculation and replenishment filters separately, then assess them against bath age, rinse behavior and equipment maintenance.
Typical process pathway
- 01
Chemical intake
Distinguish concentrate from diluted process liquid and identify particles potentially introduced by the supply line.
- 02
Bath recirculation
Assess loading from process by-products and circulation volume; track how flow changes as differential pressure rises.
- 03
Replenishment
Keep refill records separate so measurements from different concentrations or batches are not incorrectly combined.
- 04
Cleaning and bath change
Include cleaning fluids, shutdown drying and restart in the material and seal assessment.
This is a typical task pathway. Confirm sequence, equipment and operating conditions for the project.
Filtration points & selection rationale
| Process point | Filtration task | Selection rationale |
|---|---|---|
| Chemical inlet | Reduce supply-side particle loading | Match concentration and actual temperature to material documentation. |
| Circulation branch | Manage solids generated within the bath | Balance filter area, hot differential pressure and pump operating range. |
| Final rinse | Control rinse-water and pipe particles | Consider surface cleanliness and flushing recovery after filter replacement. |
Verification & operating records
| Evaluation item | Recording & comparison |
|---|---|
| Particle trends | Sample at consistent circulation stages and mark bath changes, replenishment and workpiece loading. |
| Hot operation | Record inlet pressure, outlet pressure, temperature and flow together; distinguish system pressure from filter differential pressure. |
| Cleanliness recovery | Track particles or relevant contaminants during flushing under the actual process conditions. |
Application questions
Does a PTFE membrane mean an all-fluoropolymer cartridge?
No. Structural parts may use PP, HDPE, PVDF or PFA, and seals require a separate review.
Can a water pressure-loss test predict hot-acid performance?
Not directly. Viscosity, temperature derating, wetted materials and the chemical environment all affect operating limits.
Related product pathways
Pleated Cartridges ↗
Pleated media provide an extended filtration area. Selection still starts with the fluid and filtration objective.
FILTRATIONFilter Housings ↗
Review the housing, seals and connections together with the cartridge and system conditions.
This page outlines general application considerations. Confirm product suitability against actual operating conditions and technical documentation.