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How to Spec a Fluid-Management or Filtration Part: What to Send H-O for a Quote
The fastest fluid-part quote starts with the fluid, not the foam or the gasket. If you tell H-O the reagent or sample, whether the part moves or contains fluid, and the pore-grade or seal duty, engineering can recommend a compatible material and pore grade and quote a die-cut part in one pass. This is the checklist that turns a fluidics idea into a converted part without a round of back-and-forth.
Start with the fluid, because it governs the material
The single most useful thing on a fluid-management RFQ is naming the fluid: the reagent, solvent, or sample the part touches. Chemical compatibility governs both the wicking foam and the fluid-path seal, so naming the fluid first tells engineering which materials can even be considered before any geometry matters. The second line is whether the part moves fluid, by wicking or filtering, or contains it, by sealing, because that decides open-cell versus closed-cell. Name the fluid and the job; the family follows.
The inputs that size each fluid part
Once the fluid and the job are named, each part type has its own short list:
- The fluid. The reagent, solvent, or sample, and the service temperature and time, so the material is confirmed compatible against the maker data.
- Move or contain. Whether the part wicks, filters, or seals, which decides an open-cell foam or a closed-cell or solid elastomer.
- Pore-grade or flow target (foam). The volume and time for a wick, or the particle size and flow and service life for a filter, so we size the pores per inch.
- Seal duty (elastomer). The gland geometry, the closure force, and whether the seal contacts a sample, so we size the seal and pick the grade.
- Sample contact and biocompatibility basis. Whether the part contacts a sample or fluid path and what basis your file needs per the ISO 10993 series or USP Class VI.
- Single-use or reprocessed, and quantities. Whether the part is sterilized and reused, the route and cycle count if so, and prototype plus production volumes.
What format to send
A dimensioned drawing or a DXF or STEP of the part outline is ideal, but a sketch with the cavity or gland dimensions and the job labeled is enough to start. For a foam, note which faces wick or filter and which mount, so we keep the open-cell faces clear of adhesive. If you have a material in mind from the parent page, name it and we confirm it against the fluid; if not, describe the fluid and the job and let engineering recommend a family and pore grade.
Tell us whether the part ships kiss-cut on a liner for placement.
From Fluidics Idea to Converted Part
| You send | It decides |
|---|---|
| The fluid (reagent / solvent / sample) | Which materials are compatible at all |
| Move or contain fluid | Open-cell foam vs closed-cell / solid seal |
| Volume + time (wick) | Pore grade for capillary draw |
| Particle size + flow + life (filter) | Pore grade for trapping vs flow |
| Gland geometry + closure force (seal) | Seal cross-section and grade |
| Sample contact + biocompatibility basis | ISO 10993 / USP Class VI citation in your file |
| Single-use or reprocessed + quantities | Sterilization tolerance and tooling approach |
Chemical compatibility is read from the maker data; biocompatibility basis is cited per the ISO 10993 series and USP Class VI; a reticulated foam is a wicking or particle-filter medium, not a sterile or absolute filter, and filtration validation stays with the device owner.
A worked example
Say you send: a wicking pad for a diagnostic cartridge, fluid is an aqueous buffered sample, draws a stated volume within a stated time, contacts the sample, ISO 10993 series basis wanted, single-use, cavity outline as a DXF, 500 prototype and 50,000 per year.
From that, engineering would point at a biocompatible reticulated PU foam at a pore grade sized to draw that volume in that time, confirm the maker publishes the ISO 10993 basis, keep the wicking faces clear of adhesive, and quote the die-cut pad kiss-cut on a liner. For an aggressive-reagent seal the same exchange would produce a USP Class VI FFKM confirmed compatible with the named solvent. That is the whole loop in one pass.
How H-O Products helps
H-O Products is a precision die-cut converter, not a raw-material producer and not the device maker. Tell us the fluid and the job and we recommend a compatible material and pore grade, then die-cut, kiss-cut, laminate, and kit the part to your drawing, with material traceability and lot-code TDS records under our ISO 9001:2015 certified quality management system in Winsted, Connecticut.
Grade-level values and chemical compatibility are confirmed against the maker's current data, and where a part contacts a sample we cite the maker's published biocompatibility basis per the ISO 10993 series. Filtration validation, biocompatibility testing, and device clearance stay with the device owner.
Frequently asked questions
What is the single most useful thing to put on a fluid-management RFQ?
The fluid: the reagent, solvent, or sample the part touches, plus the service temperature and time. Chemical compatibility governs both the wicking foam and the fluid-path seal, so naming the fluid first tells engineering which materials can even be considered before any geometry matters. The second line is whether the part moves fluid or contains it, which decides open-cell versus closed-cell. The fluid is the controlling input.
Do I have to send a CAD drawing, or is a sketch enough?
A sketch with the cavity or gland dimensions and the job labeled is enough to start, and for a foam, noting which faces wick or filter and which mount helps us keep the open-cell faces clear of adhesive. A dimensioned drawing is better, and a DXF or STEP of the outline is best because it lets us cut a die-cut sample on your exact geometry fastest. Send whatever you have.
Why do you need the reagent before you can quote?
Because chemical compatibility decides which materials are even candidates, and it cannot be retrofitted. A seal or foam chosen for geometry and then checked against the reagent is chosen in the wrong order, because the reagent governs the material. Name the fluid and we read the maker compatibility data to a compatible family, then size the part. Without the fluid, any material recommendation is a guess.
How do I tell you what pore grade I need?
You do not have to know the pore grade; you tell us the job and we size it. For a wick, give the volume to draw and the time available; for a filter, give the particle size to stop and the flow and service life. From those, we recommend a pores-per-inch grade that draws or traps the right amount without choking. The companion design article on this estate explains the pore-grade trade if you want the reasoning.
How do I keep an adhesive from blocking the wick?
Tell us which faces of the foam draw fluid and which mount, and we keep the adhesive off the wicking faces, patterning or placing it only where it holds the part. The open-cell faces that do the wicking must stay clear, so the adhesive goes on a non-wicking surface. We kiss-cut the part on a liner so the line places it cleanly without touching the wicking zone.
What biocompatibility information should I include?
Whether the part contacts a sample or fluid path and what biocompatibility basis your file needs cited. We convert materials whose makers publish a basis per the ISO 10993 series, such as cytotoxicity, sensitization, and irritation endpoints, and USP Class VI where applicable, and we pass that basis through with traceability. We do not perform the testing or clear the device, so naming the basis you need lets us point you at a material whose maker publishes it.
Do I need to tell you if the part is single-use or reprocessed?
Yes. If the part is reprocessed, the sterilization route and cycle count are named so the foam and any seal are confirmed to tolerate them; if it is single-use, the material latitude is wider. Many reticulated-foam wicking parts are single-use because they capture the sample, but the device design determines that. Tell us which, and we select and convert accordingly; the sterilization validation stays with the device owner.
Can you match a material I already have on the parent page?
Yes. Name the family or grade you have in mind, such as a biocompatible reticulated PU foam or a USP Class VI FFKM, and we confirm it against the fluid and the job you describe and quote it as a die-cut part. If the reagent makes it a poor fit, we flag that and suggest a compatible alternative. The fluid and the job are what we check the material against.
How fast can I get a sample once I send the spec?
For common die-cut configurations on materials we keep on hand, samples typically ship in 3 to 5 business days, and sending a DXF or STEP of the outline is the fastest path because we cut on your exact geometry. Standard production runs about two weeks after drawing approval, and expedited service is available. MOQ varies by material and part. A complete checklist on the first pass keeps the sample loop short.
Does H-O validate filtration or clear the device?
No. H-O converts the foams, seals, and elastomers to your drawing and supplies material traceability and lot-code TDS records that support your file. Validating the filtration, performing biocompatibility testing per the ISO 10993 series, and clearing the device belong to the device owner and its test houses. A reticulated foam is a wicking or particle-filter medium, not a validated sterile or absolute filter. Our deliverable is the converted, die-cut part.
What do I send to get a fluid-management or filtration quote?
Name the fluid and the service temperature and time, say whether the part moves or contains fluid, and send the geometry plus the volume and time for a wick, the particle size and flow for a filter, or the gland and closure force for a seal. Add whether the part contacts a sample, the biocompatibility basis your file needs, whether it is single-use or reprocessed, and the quantities. With that, engineering recommends a compatible material and pore grade and quotes a die-cut part.
Send your fluid-part spec for a quote
Name the fluid, say whether the part moves or contains it, and send the geometry and the pore-grade or seal duty plus the quantities, and we will recommend a compatible material and pore grade and quote a die-cut part to your drawing.
Samples typically ship in 3 to 5 business days for common die-cut configurations on materials we keep on hand; standard production runs about two weeks after drawing approval; expedited service is available. MOQ varies by material and part.
Family-owned in Winsted, Connecticut since 1971 · ISO 9001:2015 certified · OEMs worldwide send us a drawing — and get back their part.
Related reading
Request a quote for your medical fluid-management part
Name the fluid and send the geometry and the six sizing inputs—engineering reviews every RFQ and converts samples on your geometry.
Last updated · Reviewed by H-O Products engineering (ISO 9001:2015 certified converter, Winsted, CT).
References
- ISO 10993 series (biological evaluation endpoints) and USP Class VI, cited by designation as the biocompatibility basis named on each maker data sheet.
- Manufacturer chemical-compatibility data and technical data sheets for the medical silicone, FDA-grade elastomers, and USP Class VI FFKM seal grades named on the parent application page.
- Manufacturer technical data sheets and pore-grade data for the biocompatible, uncoated, and coated reticulated PU foam grades named on the parent application page.
This article summarizes material-selection and design principles for medical fluid management and filtration using the families and published test methods cited on the parent application page. Comparisons are qualitative; per-grade values are maker technical-data-sheet figures and must be confirmed on the manufacturer's current TDS at your installed condition. Standards (ISO 10993, USP Class VI, ISO 11607, IEC, ASTM, UL) are cited by designation for context, not as a claim of qualification or registration.
H-O Products is a precision die-cut converter, not a raw-material producer and not the device maker; biocompatibility testing, sterilization validation, device clearance, and final-assembly certification belong to the device owner and its test houses.