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  • Users: eic13
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  1. eic13

    Frequent PSV internal wear and leakage

    There are numerous PI's on the system, but only a couple of them can log data. One being downstream of the filters, another being upstream of the standby pump PSV. The filters typically operate with a DP of 0.3-0.7 bar according to data logging. Thanks for the advice. We have been dealing...
  2. eic13

    Frequent PSV internal wear and leakage

    Unfortunately settle-out calcs are not even in our office (I have checked); hopefully the OEM can provide details. The PI on the standby pump is upstream of the both NRV and PSV. NRV is on a separate branch to the PSV; they are in parallel not series. Sorry it's a bit hard to sufficiently...
  3. eic13

    Frequent PSV internal wear and leakage

    georgeverghese, I am querying how the settle-out was derived, however since the units were designed in the early 1980's I am not too optimistic on getting a decent answer. LittleInch, Normal operating discharge pressure of the duty unit is 103 barg (maybe a little higher at the pump, as this...
  4. eic13

    Frequent PSV internal wear and leakage

    georgeverghese, I was unsure about this requirement, as the listed settle-out pressure is higher than the rated discharge pressure of the compressor. So theoretically how can this pressure be reached? I asked the some of my rotating equipment engineers, but have yet to get any responses on how...
  5. eic13

    Frequent PSV internal wear and leakage

    Thanks for the responses everyone. Some good suggestions/leads to follow that I’ll have to follow up with the operators and other engineers. Georgeverghese, Thanks for the further info. Having had another look at the flow diagrams I see the contaminated seal oil pots drain back to the main oil...
  6. eic13

    Frequent PSV internal wear and leakage

    georgeverghese, thanks for the suggestion. Max operating pressure can be as high as 104 barg. Typically it sits around the 102-104 range. I have been looking at the possibility of reducing the operating pressure of the pumps, in order to move away from the PSV setpoint. However one of our sister...
  7. eic13

    Frequent PSV internal wear and leakage

    Hi all, We have two PSV in seal oil service that are subject to failure/wear. The system in question has been operating since mid-1980’s and is original kit. The two PSV’s are mounted on the discharge of two seal oil pumps; one PSV on the duty pump, one on the standby pump. Reviewing the...

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