5 Operation
WARNING
Risk of overpressure
At the pump exhaust, the discharge circuit must be such that the resulting overpressure in the oil
case is as low as possible. The maximum overpressure recommended for correct pump operation is
500 hPa. A slight negative pressure in the oil case (100–200 hPa), at the exhaust, will prevent gases
from accumulating and reduce pump corrosion and pollution.
When the OME is installed to a pump exhaust, check periodically that:
► The exhaust valve is not clogged and does not prevent the operation of the OME’s valve.
► The exhaust valve operates to avoid overpressure in the oil case
WARNING
Emission of toxic substances from the exhaust
Danger of poisoning from emitted gases or vapours, which can be detrimental to health and/or can
pollute the environment, depending on the particular application.
► The exhaust valve is not clogged and does not prevent the operation of the OME’s valve.
► The exhaust valve operates to avoid overpressure in the oil case.
Do not reuse an OME that has been stored for a long duration (> 1 year).
Perform maintenance and replace the filtration element before use.
Commissioning
► Turn the pump on.
During operation, oil and vapors are trapped by the filter element until it becomes clogged/saturated. In
this case, the relief valve should open when the internal pressure exceeds atmospheric pressure by
500 hPa.
Decommissioning
1. Stop the pump.
2. Bring the pump back to the atmospheric pressure and let the pump cool down.
3. Make sure the exhaust pipe is not under pressure.
5.1 Filter element saturation
The time taken to reach saturation point depends on the number of pumping cycles, the volume of
pumped gas and the kind of operating fluid used.
The signs of a saturated filter element are :
● Excess of smokes or droplets, or puffs of stream at the OME exhaust
● Rapid or significant drop in the oil level
● Increase of the pump oil case temperature
● Valve noise
When the filter element is saturated, proceed to its replacement (see « Maintenance » chapter)
Operation
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