Clean Valves
Ensure all mercury is below drain valves. Evacuate the reservoir and open the drain and fill valves with the low pressure manifold at atmospheric pressure. Failure to do so could result in a mercury spill. |
Power off the analyzer before removing the rear panel. Failure to do so could result in personal injury. |
- Disconnect the power cord.
- Remove the upper rear panel by removing the retaining screws.
- Remove the 11/16 in. nut retaining the valve actuating coil from the mercury fill [5] and drain [6] valves. Pull the coils off.
Valve Location | Description |
---|---|
1 | Servo isolation valve |
2 | Fast evacuation valve |
3 | Vacuum valve |
4 | Gas inlet valve |
5 | Mercury fill valve |
6 | Mercury drain valve |
7 | Mercury reservoir evacuation valve |
8 | Evacuation reservoir valve |
9 | Vent valve. If a cap detector is removed when the pressure is above atmospheric pressure, the low pressure system will be vented to atmosphere with this valve. |
- Place a container below the valves to capture any retained mercury.
- Remove the plunger housing from each using the special spanner wrench from the accessory kit.
- Clean the plunger and housing with IPA and expose the valve seat. Use a pipe cleaner to clean the valve seat. Ensure that no lint remains on the sealing surface.
- Re-assemble the valves.
- The slow / medium, medium, and fast evacuation valves, and the gas inlet solenoid valve are much less likely to collect debris. They can be cleaned (as outlined above) if cleaning the mercury valves did not solve the vacuum difficulty.
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