Seal the High Pressure Chamber
High pressure fluid leaking past the chamber seal indicates one of three problems:
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The chamber plug seals the high pressure chamber. Proper sealing does not require the use of excessive force. The outside diameter of the elastic seal on the plug is slightly larger than the inner diameter of the pressure chamber. Lowering the chamber plug into the pressure chamber presses the seal against the chamber wall, sealing the chamber. Then, as pressure increases during an analysis, the outer lip of the seal is forced more tightly against the chamber wall, preventing leakage.
- Push the plug into the chamber until it contacts the chamber shoulder. Several threads of the plug will remain exposed.
- Ensure the vent valve is partially open (unscrewed). Slowly turn the plug clockwise into the chamber to force air from the chamber. Continue turning until high pressure fluid (or air bubbles and fluid) appears in the transparent cup on top of the vent valve.
Tightening the plug too quickly may cause unwanted intrusion caused by pressure created when the chamber is closed. |
- The cup should not be completely full. If the cup is too full, slowly open the chamber and recheck the fluid level. Fluid may need to be removed. See Maintain High Pressure Fluid Level for instructions on how to remove excessive fluid. Repeat the previous steps to release trapped air.
- Large air bubbles may be caught in the chamber. Slowly loosen and tighten the plug approximately 1/2 turn several times. This should cause any air bubbles to rise through the transparent cup to the surface. Any remaining tiny bubbles will not affect the analysis.
- If no fluid is visible in the cup when the plug is fully tightened, open the chamber and recheck the fluid level. It is likely that fluid may need to be added. Repeat the previous steps to release trapped air.
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