Thanks big & little inches. y'all are brothers? :)
I thought I had replied earlier but I guess it never wen through, but lil inch. I am not seeking a company that has to be in West Virginia. It doesn't matter to me where in the USA the company is located. going "across the pond" thought may...
Thanks for replying littleinch. let me rephrase a couple of sentences which hopefully will minimize some confusion:" We have a slug catcher made by a company which is not working for our operating conditions. The manufacturer for it seems unwilling to help, so we want to have another company...
Anyone have suggestions on a good company for engineering slug catchers? We have a slug catcher made by a company which is not working for our operating conditions. The manufacturer for it seems unwilling to help, so we want to have another company review the design and give modification...
"I should know by now not to assume ANYTHING in these forums. The seem to be affected by Murphy's_Laws^2 " lol!
Or assume that you got incomplete info :( Sorry about that BigInch, but do appreciate your input as always - very insightful.
On a related note with regards to the pressure...
ok. I'm not sure why neither file uploaded..?? trying to upload again...http://files.engineering.com/getfile.aspx?folder=f7758408-c2c8-4e72-b435-e8e0783a788b&file=Pump_Operation_Measurements.xlsx
Oops. Here is the other file summarizing the measured parameters. I guess I can only load one file per message?
Anyway we still have slightly more head than anticipated. Since we can't safely reduce the impeller size any less, we will install either an orifice plate in that 3" branch or open a...
Johnny, I make no profession to be a "pump guy" & I respect your knowledge in the field. What I shared before was simply what I observed in the field and what I could interpolate from the suppliers pump curve based on field results. I do agree that something is not right. I have attached the...
Well the 6.75" impeller did not give the expected result. The pressure at the 3" branch was 72 psig. (This is the same location that we took all previous discharge pressures, by the way).
Johnny, as Ted suggested I thought increasing the head increases the pump flow. I believe it's a...
Thanks Dubmac. Based on the dP measured & the manufacturer's curve seems we were getting close to 200 feet of head and over 400 gpm! wow! We're in the process of having the impellers trimmed. The supplier didn't have any in the size needed in stock.
Hopefully reducing the impeller diameter...
I'm sorry, but the diagram does not indicate the expansion tank. There is one in the system & it is vented. So it is not a truly closed loop.
I had also contacted the pump manufacturer yesterday & heard back from them today. The problem was exactly as several had suggested - the impeller was...
Thanks all. I really appreciate the suggestions :)
gr2vessels, we could probably live with reduced flow if we go with a smaller impeller. Is there a rule of thumb correlating flow with impeller diameter? or should I just go with the supplier's pump curve?
bimr, we have gate valves installed...
Does anyone have ideas on how to reduce pump outlet pressure? We recently installed a pair of pumps (primary & backup up operation) which are delivering 80 psig pressure where we were expecting about 50-60 psig. I'm not sure why it's building that much pressure, but need to know ways/ideas on...
thanks for explaining about the pressure drop through the flowrates. i will fix this calculation.
i see the error in my calculation to get the branch flowrate. i was using a total area based on the 6" header plus that individual branch instead of the total area based on the branches (3" & 4")...
katmar (harvey?),
I actually tried multiplying the flow by ratio of cross sectional area for each branch, but the sum of the branch flows didn't equal the (total 325gpm) flow. for the 4" branches the flow was ~43 gpm & the 3" branch had 24 gpm flow. Unless I did something wrong?
I multiplied...
