Critical final filtration
PTFE membrane with PFA support, with published options from 0.45 µm to 10 nm and 10- or 20-inch configurations.
Up to 180°C0.59 MPa at 50°C
Open family specifications →
Made in China · electronic chemical filtration
PTFE and PFA semiconductor filter cartridges.
Zhongfu all-fluoropolymer formats combine PTFE membranes with PFA support structures for selected electronic chemical, wet etch, cleaning and chemical delivery duties. Choose the family by chemistry, retention method, flow, pressure drop and installation position—not by pore label alone.
Published grade options0.45 µm to 10 nmFamily-dependent selection labels
Cartridge formats10 and 20 inch70 or 83 mm outside diameter by family
ConstructionPTFE membrane · PFA supportFEP or FFKM seal options
Tool-side optionIntegrated all-PFA flow pathFor selected wet-process positions
Construction logic
PTFE controls the membrane interface. PFA supports the chemical path.
The membrane, cage, end caps, support and seal all contact the process. An “all-fluoropolymer” selection therefore means more than choosing a PTFE membrane: the supporting structure and seal option must also fit the chemistry, temperature, pressure and facility standard.
Published product data support initial screening. Chemical compatibility, cleanliness requirements and the planned validation method remain application-specific.
Do not interpret a nanometre label as a guaranteed process removal result. Confirm the retention test method, challenge conditions and acceptance criteria before comparing two filters.
MEMBRANEPTFE options for compatible high-purity acids, bases, solvents and cleaning chemistries.
STRUCTUREPFA cage, end caps and support in the all-fluoropolymer cartridge families.
SEALSFEP or FFKM options; final seal choice follows the actual media and operating envelope.
INTERFACEAS568-222 cartridge connection or an integrated T-type wet-process flow path, by family.
Four selection routes
Start with the process constraint.
These routes narrow the family. A formal recommendation still requires the chemical/SDS, hydraulics, interface and qualification target.
Flow and pressure-drop balance
A high-flow PTFE membrane in a PFA structure for compatible duties where throughput, clean pressure drop and usable service life must be evaluated together.
0.2 µm to 10 nmUp to 4.2 m²
Open family specifications →Capacity or cartridge-count review
Large-area high-flow PTFE formats for selected electronic chemical and CDS stages where hydraulic capacity is the primary design constraint.
50 nm to 10 nm10 or 20 inch
Open family specifications →Tool-side chemical path
A PTFE membrane within an all-PFA housing and internal support for selected single-wafer and batch wet-process equipment.
2.1 m²Up to 185°C
Open family specifications →Additional wettability and housing routes
Keep the published range and sourced routes distinct.
The four families above are Zhongfu engineered and made in China. Where the process needs a different wettability route or a separate housing, we can also screen complementary options without applying Zhongfu specifications to them.
ZHONGFUPublished PTFE/PFA high-retention, high-flow, ultra-high-flow and integrated families
SOURCEDHydrophilic or modified-wettability PTFE/PFA routes confirmed per quotation
HOUSINGPFA single-cartridge housing route confirmed by medium and operating envelope
ORIGINCountry of origin for sourced products confirmed in the quotation
Place the filter before choosing it
Electronic chemical production, recirculation, final filtration, packaging, facility CDS and wet-tool point of use can see different particle loads, flow profiles and cleanliness requirements. Even when the chemical name is identical, the correct membrane area and structure can change by position.
- Electronic chemical production: map prefiltration, recirculation and final filtration separately.
- CDS and distribution: define normal and peak flow, allowable pressure drop and housing interface.
- Wet etch and clean: include concentration, temperature excursions, tool configuration and change-out method.
- Replacement projects: provide the complete incumbent part number, label photo and the reason for review.
Initial screening matrix
| Decision | Information needed | Why it changes the selection |
|---|---|---|
| Chemistry | Chemical name, concentration, SDS and additives | Determines membrane, structural and seal-material screening. |
| Retention | Contaminant type, size range, test method and acceptance criterion | Prevents a pore-label-only comparison. |
| Hydraulics | Normal/peak flow, inlet pressure, clean and change-out differential pressure | Guides membrane area and high-flow versus high-retention route. |
| Temperature | Normal, maximum and cleaning excursions | Must remain within the chosen family and seal envelope. |
| Hardware | Length, outside diameter, adapter, seal, housing or integrated interface | Confirms installation fit before sample testing. |
| Qualification | Sample quantity, baseline, test duration and pass/fail criteria | Turns a catalogue screen into a controlled evaluation. |
What to send for a technical review
Send the chemical and SDS, process position, concentration, viscosity, temperature, flow, inlet pressure, allowable pressure drop, current housing or filter part number, connection, required documents, sample quantity and delivery destination. For a replacement, a clear label photo is often the fastest starting point.
Common questions
Is every PTFE filter an all-fluoropolymer cartridge?
No. PTFE may describe only the membrane. Confirm the cage, end caps, support and seal materials. Zhongfu also publishes semi-fluoropolymer families that combine PTFE membranes with PP or HDPE structures for compatible duties.
Should I select 10 nm instead of 20 nm for better results?
Not from the label alone. Retention method, flow, pressure drop, particle loading and the process acceptance test must be compared together.
Can Zhongfu review an existing filter for a potential second source?
Yes, as an application and qualification review. A part is not described as a drop-in replacement until construction, interface, test method and process acceptance data support that conclusion.
Review a PTFE/PFA filter position.
Send the chemistry, operating envelope and current part or interface.