SterliTECH Tip: 3 Best Practices For Easier Permeate Collection
Membrane flat sheet test cells and housings are essential tools in research and development laboratories.
They allow researchers to quickly gather data on rejection, flux, and fouling behavior, helping accelerate membrane development and application testing.
In Sterlitech’s test cells, the permeate tube plays an important role in directing permeate into collection vessels such as beakers or graduated cylinders. Proper handling is essential not only for consistent system performance and accurate test results, but also for preserving the integrity of high-value permeation processes where precision and reliability are critical.
Here are three best practices to make permeate tube handling easier and more reliable:
- Secure the Tubing with a Clamp: Using a lab-grade or heavy-duty clamp—such as a trigger clamp—helps hold the permeate tube against a rigid frame. This ensures the outlet stays directed into the beaker, minimizing the risk of spills or misalignment. Pro tip: A handheld heater can be used to reshape the tubing for better positioning into the collection vessel.
- Use a 90-Degree Elbow Fitting: When test cells are mounted high on a skid system, routing the permeate line straight down can be tricky. A 90-degree elbow fitting diverts the flow sideways, making tube management simpler and reducing stress on the tubing.
- Consider Flexible Tubing Alternatives: Rigid polypropylene tubing (¼" OD in flat sheet cells, ⅜" OD in 1812 housings) is standard and chemically resistant—but it can be hard to maneuver. For greater flexibility, consider swapping it with Tygon or other lab-grade tubing. Reminder: Always verify chemical compatibility before replacing tubing.
Strengthening Your Workflow
Though minor, the permeate tube plays a critical role in the successful operation of membrane test cells. Taking a few minutes to secure or adapt tubing improves efficiency, prevents contamination, and ensures accurate test results.
