The video demonstrates how to properly tape and seal vacuum connections on a freeze dryer to ensure its efficient operation. It provides a step-by-step guide on using the self-sealing silicone tape and clear silicone to secure the various fittings and prevent any leaks.
Taping Your Vacuum Connections
Tools Needed:
- Silicone-based self-sealing tape
- Scissors
- Clear silicone
- Gloves (optional)
- Spatula
Steps:
- Remove the Panels: Start by fully removing the panels from your freeze dryer.
- Taping Drain Valve: Begin with the drain valve coming off your drain hose. Apply the silicone tape from the back of the valve, working your way past the threads, onto the brass fitting and the actual hose. Ensure to apply a bit of pressure for the self-fusing.
- Taping Vacuum chamber: Next, tape from where the actual chamber threads start, and then down onto your actual drain hose.
- Taping Vacuum Pump: Move to the fitting between your vacuum pump and the actual vacuum hose. Start from the pump fitting, working your way up past, and onto the vacuum hose.
- Taping Vacuum Hose to Chamber Connection: Tape your vacuum hose to chamber connection. Apply the tape from the hose, working your way up until you have passed all fittings.
- Applying Silicone to Vacuum sensor and epoxy harness: Due to their complexity, instead of taping, apply clear silicone around the vacuum sensor fitting and the epoxy harness. Ensure it covers all cracks and crevices around these fittings.
- Clearing Insulation from Fittings: Cut off any foam insulation obscuring the fittings above the vacuum hose connection using a razor knife.
- Applying Vacuum: Once all vacuum connections are secured, apply a vacuum on the chamber using the machine’s ‘functional testing’ feature. Leave it for 24 hours to allow the silicone to cure. Do not open the drain valve or door during this period.
