The CF025, CF047 and CF090 are 316SS circular crossflow cells that provide fast and accurate performance data with minimal amount of membrane material, expense, or time.
They have a maximum pressure of 1000 psi (69 bar) depending upon temperature and membrane material. We produced three seperate sizes to assist a researcher in scaling up to larger membranes.
Interested in learning how to operate our membrane process equipment? Check out our MPD channel to watch videos now! Membrane Process and Equipment Guide and Demonstrations
| SKU | Product Name | Material Type | Est Ship | Price | ||
|---|---|---|---|---|---|---|
|
1160522 | CF025 Circular Cell Assembly, Crossflow, 316SS | 316 SS | Contact Us |
$3,700.00
|
|
|
1160354 | CF047 Circular Cell Assembly, Crossflow, 316 SS | 316 SS | 1-2 days |
$2,027.49
|
|
|
1160361 | CF090 Circular Cell Assembly, Crossflow, 316 SS | 316 SS | 1-2 days |
$3,069.13
|
|
|
1160442 | CF047X Circular Cell Assembly, Crossflow, 316 SS | 316 SS | 1-2 days |
$5,393.37
|
|
|
1160489 | CF047X Circular Cell Assembly, Crossflow, Hastelloy C276 | C276 | 1-2 days |
$18,876.80
|
Accessory
| SKU | Product Name | Price | |
|---|---|---|---|
| 1160380 | O-Ring Kit for CF090, Buna |
$24.02
|
|
| 1160381 | O-Ring Kit for CF090, Viton |
$61.24
|
|
| 1160382 | O-Ring Kit for CF090, EPDM |
$37.33
|
|
| 1160509 | O-ring Kit for CF090, PTFE/FEP Encapsulated |
$34.78
|
|
| 1160383 | O-Ring Kit for CF047, Buna |
$24.02
|
|
| 1160384 | O-Ring Kit for CF047, Viton |
$38.44
|
|
| 1160385 | O-Ring Kit for CF047, EPDM |
$37.33
|
|
| 1160487 | O-Ring Kit for CF047, PTFE Encapsulated |
$48.05
|
|
| 1560073 | Round Arch Punch, 47mm |
$353.78
|
|
| 1560008 | Steel Rule Die, 90mm |
$203.44
|
Frequently Asked Questions
Q: What is the recommended flow rate for the CF cells?
Please refer to the following diagram to examine recommended feed flow rates for the crossflow cell you are working with.
Q: Why is the flat sheet membrane I'm using measuring a flux value less than the published flux value?
Flow characteristics for a spiral element and flat sheet membrane are significantly different and are really only comparable on a qualitative basis. Variability in the membrane manufacturing process, differences in water composition, test procedures, and test equipment, used in a factory, laboratory, or elsewhere, will impact water flux results.
Reference: Understanding Variation of Experimental Flux and Rejection
Q: What is the recommended flow rate for the CF cells?
lease refer to the following diagram to examine recommended feed flow rates for the crossflow cell you are working with.
Q: What are the available materials of construction for the Sterlitech crossflow test cells?
The Sterlitech bench-scale crossflow test cells are available in a variety of materials to suit most applications:
- Stainless Steel
- PTFE
- HastelloyTM
- Delrin (natural acetal copolymer)
- Acrylic
Addtionally, there are a variety of available o-ring seals including Buna-N, EPDM, Viton, FEP encapsulated Viton, and FFKM (Markez).
Q: Can I reuse flat sheet membranes after they have been removed from a crossflow test cell?
Yes, you may attempt to reuse flat sheet membranes. However, you may find it difficult to achieve a leak free seal. The cell body o-rings necessarily compress the membrane during installation and the physical action of separating the membrane from the o-rings during removal may cause damage. This damage can impede that ability to achieve a leak free seal when the membrane is reused.
Q: How do I install/remove permeate fittings or other plastic NPT fittings?
Sterlitech recommends to install all plastic fittings by hand using PTFE tape. If a plastic NPT or compression fitting starts to leak during operational testing, tighten the fitting carefully until the leaking stops. Excessive tightening may break the fitting or damage other components.
If the fittings is broken and stuck in the cell top, use a spiral flute extractor bit or similar tool to release the portion of the fitting in the cell top. If the cell top becomes cracked from removal efforts, a replacement can be purchased.
Q: What are the differences between the crossflow test cells and the Sterlitech HP4750 stirred cell?
Sterlitech crossflow test cells (Sepa® CF, CF042, and CF016) operate in true crossflow filtration mode, meaning the feed flows tangentially across the membrane and produces both a permeate stream and a concentrate (retentate) stream. These systems allow continuous operation, with user-controlled pressure and crossflow rate, and enable ongoing sampling from both streams during testing.
The HP4750 Stirred Cell, by comparison, is a sealed batch filtration device (up to 300 mL feed volume) typically pressurized with compressed gas. It runs in normal-flow (dead-end) mode and does not have a concentrate stream. A stir bar helps reduce concentration polarization and simulates crossflow-like mixing at the membrane surface, but it is not true crossflow.
Q: I have noticed that the flat sheet membranes come in sizes described as CF016, CF042, and Sepa CF. What are these sizes?
