Centrifugal pump started on min flow recycle with normal back pressure.
I'm more interested in things like motor problems - could a motor issue cause high amps?
Pump was run 30 secs then manually shutdown due to high amps.
Not relates to flow as minimum flow was met in recycle. Current at this flow would be significantly less than we seen.
Hi,
I have a pump which is going close to over load current for a prolonged period during start up when the pump is running at low flow. Other than flow, what can be causing the high current?
Thanks.
Thanks for the replies.
If i can ignore the erosional velocity limit, what criterion should i be using to determine max allowed velocity in the 3" line?
Note that this pump constantly recycles as the the min flo wset point is well above the forward flow rate (over sized pump for current...
I have a 6" line with a 3" control valve installed on it. Pump min flow recycle with continuous recycle flow. Crude oil service.
When i do line sizing, 6" line velocity is below the erosional velocity limit, but the 3" line is well above it. The 3" line is only the redcers for the control...
Are there any cases where it is unacceptable to leak test the downstream flange of a PSV i.e. can a relief valve be damaged by an artificially high back pressure due to leak testing?
I'm not proposing to leak test in excess of the flange rating but leak testing will mean that the downstream...
We are running a centrifugal gas compressor train (x 3 compressors in series).
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We have confirmed that the compressors can...
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I have a vessel with lots of large bore liquid pipework within a fire area.
I want to confirm the correct option for gire heat input as per the API 521 equation. Is it
Option 1: calculate total wetted surface area then do A^0.82
Or
Option 2: calculate A^0.82 for all pipes and vessels...
What discharge coefficients are recommended for low pressure tank PSVs when designed to API 2000?
This is for preliminary sizing. Service is gas. For API 520 I'd use 0.975 but not sure this applies to an API 2000 psv.
Thanks.
I have a demethanizer column and im sizing the psv for the blocked vapor outlet case.
Ive simulated the scenario in hysys with max reboiler duty allowed for in the model.
Is steady state simulation the correct approach for this scenario?
Thanks.
I have a heat exchanger with a PSV on the cold side. My scenario is control valve failure on the hot side sending more hot fluid via the exchanger than is quoted on the data sheet.
Is there a simple way for me to estimate worst case heat transfer rate to the cold side for this scenario?
Thanks.
