Chamber Cap O-Ring
The cell chamber cap contains an O-ring that requires routine maintenance. The chamber cap O-ring should be greased at the beginning of each period of use.
Fine fibers and particles between the O-ring and its sealing surfaces can cause leaks, as can scratches or cuts in the O-ring or in the metal surfaces.
Grease the Chamber Cap O-Ring
- Turn the chamber cap counter-clockwise and lift it from the chamber.
- Place the chamber cap on a clean surface with the O-ring side exposed.
- Use a small drop of Dow Corning high vacuum grease (or equivalent).
- Distribute the grease evenly and completely around the O-ring groove.
- Replace the chamber cap.
- If recalibrating the pycnometer, allow the pycnometer to warm up for 30 minutes before calibrating.
Replace the Chamber Cap O-Ring
- Use a pointed tool and carefully remove the O-ring from its groove in the cap. A small niche is provided at the groove for placement of the tool.
Do not to scratch the metal surface of the chamber cap. Scratches could result in an imperfect seal. |
- Clean the groove in the chamber cap using a small brush or lint-free tissue moistened with isopropyl alcohol.
- Allow the chamber cap to dry thoroughly.
- Use a small drop of Dow Corning high vacuum grease (or equivalent).
- Grasp the O-ring with the two greased fingers. Distribute the grease evenly and completely around the O-ring.
Apply the grease sparingly. Too much grease may alter cell volume while too little grease results in an imperfect seal and leaks. |
- Place the O-ring back into the groove on the cap and, with the greased index finger, gently press it back into position.
- Ensure the O-ring groove is properly greased. See Grease the Chamber Cap O-Ring.
- Replace the chamber cap.
Micromeritics Learning Center Contact Us
Copyright © 2019. Micromeritics Instrument Corporation. All rights reserved.
![]() | ![]() | ![]() | ![]() | ![]() |