How replacement works
Send us the plate dimensions, port style and location, frame type and quantity, ideally with photos and a sample if available. We confirm fit, propose a membrane, and quote. Our plates are offered as a replacement for or alternative to original plates; we make no claim of affiliation with the original manufacturers.
Hollow fiber, typical flat sheet and Zyramic cartridges
How the three approaches generally compare in service:
| Feature | Hollow fiber | Typical flat sheet | Zyramic cartridge (Swing) |
|---|---|---|---|
| Replacement | Whole bundle or module | Full panels or cassettes | Replace a cartridge quickly: swap one small cartridge in minutes without pulling the whole module |
| Owner maintenance | Bundle repair or replacement often needs specialist help | Panels or cassettes usually lifted as a unit | Surface servicing: sheets stay sealed in their small, cost-effective cartridge, so you swap the whole cartridge quickly, in minutes, in-house with basic tools and little downtime |
| Wear and tear | Fibers can break at the potting | Large sheets flex in service | Small sheets flex less, for less wear and tear |
| Edge seals | Potted fiber ends | Varies by design | Strong wide membrane welds, designed to resist delamination |
| Membrane | Thin fibers | Varies | Thick, about 250 microns including support, for robust service |
| Ragging | Hair can wrap fiber bundles | Open channels | Open channels between small sheets |
| Inspection | Bundle examined closely | Panel lifted to inspect | A lifted cartridge shows its condition at a glance |
| Custom sizing | Fixed module sizes | Often fixed sizes | Cartridge and module sizes tailored to your tanks in many cases |
Performance depends on pretreatment, design flux and operation.
Custom sizing: we cut, weld and assemble in Poughkeepsie, NY, so cartridge and module sizes can often be tailored to your existing tanks. Tell us your tank dimensions, or see custom sizes.
What you get
- Thick membrane, about 250 microns, intended for robust service
- Strong wide membrane welds designed to resist delamination
- 0.04 µm UF standard, 0.4 µm MF available
- Assembled in Poughkeepsie, NY of domestic and imported components
- Small-batch and custom sizes
Before you order
Check whether the cassette frame, permeate tubing and diffusers also need attention; it is often efficient to address them at the same time. If you are considering a format change instead, read retrofit options. More on our replacement membranes page.
Worked sizing example
Take a 158,503 gpd (600 m³/day) flat-sheet plant replacing plates:
| Item | US | Metric | Note |
|---|---|---|---|
| Average flow | 158,503 gpd | 600 m³/day | about 110 gpm (25,000 L/h) |
| Design flux (gross) | 8.8 gfd | 15 LMH | Zyramic design guidance |
| Derate for relaxation and cleaning | ~20% | ~20% | |
| Net flux | ~7.1 gfd | ~12 LMH | |
| Membrane area needed | ~22,425 ft² | ~2,083 m² | average flow ÷ net flux |
| Swing-8 cartridges | ~167 | ~167 | 135 ft² (12.5 m²) each |
| Peak factor | ~2.0 | ~2.0 | |
| Peak flow | ~317,006 gpd | ~1,200 m³/day | extra area, short-term higher flux, or equalization |
This is an illustration only; a real design also checks temperature, MLSS, redundancy and the cleaning schedule.
Tips for a smooth project
- Compare modules on lifecycle, not area alone
- Plan how replacement parts will be sourced later
- Allow room for handling and inspection
- Check cassette dimensions before ordering replacements
Next step
A good way to see which design choices matter most for your plant is to look at your own maintenance history. Tell us what has needed attention in the past, and we will explain which of our options fits it best.
Sizing considerations
To give a useful recommendation we usually need:
- Plate dimensions and thickness
- Port style and location
- Quantity and cassette count
- Photos or a sample plate
- Required delivery date
Most relevant product: Replacement membranes. See also replacement membranes, rentals and how to choose.
Why engineers look at Zyramic flat-sheet modules
| Item | Details |
|---|---|
| Smaller sheets, less wear and tear | each sheet flexes less in service, and a damaged unit affects less area. |
| Strong wide membrane welds | designed to resist delamination over the membrane's life. |
| Thick, robust membrane | about 250 microns including support. |
| Assembled in Poughkeepsie, NY | of domestic and imported components. In our Poughkeepsie shop we cut and weld membrane sheets to plates, build module frames and assemble complete modules. For funded projects, tell us your domestic-content requirements and we'll review what we can document. |
| Buy, rent or replace | new modules, rentals and pilots for US projects, and replacement membranes that fit many existing cassettes. |
Performance and life depend on pretreatment, design flux and operation; flux figures are Zyramic design guidance, sized to each project.
Frequently asked questions
Will your plates void my original warranty?
Warranty terms vary; check with your original supplier. Our plates carry Zyramic's own warranty.
Do you need a sample?
A sample or detailed drawing helps us confirm fit.
Can you match different pore sizes?
We offer 0.04 µm UF and 0.4 µm MF.
How many plates is the minimum?
We handle small and large orders; ask with your quote.
Can you match the original membrane material?
We offer our own membranes; we will explain any differences from your current plates.
Do you supply replacement tubing and fittings?
Yes, see parts and accessories, or include them in your quote request.