Map each water position separately
Record whether the filter is in facility distribution, a polishing loop, final supply, substrate rinse, equipment recirculation or tool point of use. Avoid carrying a single cartridge choice across every position without checking the local hydraulic and cleanliness duty.
| Position | Primary screening question | Useful inputs |
|---|---|---|
| Distribution | Can the route meet system flow and allowable pressure loss? | Normal/peak flow, pressure, pipe size, redundancy |
| Final or rinse | What particle or cleanliness objective applies at the point of use? | Water target, monitoring method, downstream process |
| Recirculation | How does repeated exposure affect cleanliness and pressure drop? | Loop volume, turnover, temperature, change-out rule |
| Tool POU | What envelope, connection and hold-up constraints apply? | Tool interface, flow profile, space, orientation |
Relevant product routes
Pleated PP, hydrophilic PES, water-ready PTFE, compact POU, capsule and selected hydrophilic nylon routes are screened according to the actual water duty. Housing options include PP, PFA and stainless steel after wetted-material and seal review.
Compare DIW and UPW filter families
Information that changes the recommendation
- DIW or UPW quality target and current monitoring method.
- Process position and downstream sensitivity.
- Normal and maximum flow, inlet pressure and allowable pressure drop.
- Temperature, connection, orientation and installation envelope.
- Particle, cleanliness, extractables or other written acceptance method.
- Current full model and label photo for replacement reviews.
Product identity and approval boundary
The page combines Zhongfu engineered liquid-filter options with application-matched sourced routes. Manufacturer, model, origin, documents and availability for sourced products are confirmed per quotation. No generic material description replaces final qualification under the customer's water conditions.