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  1. naturalgas01

    Caustic+NGL filtration

    Thanks dcasto, I agree with you. Our normal flowrate is 125 gpm and design capacity of filters are 175 gpm. Is oversize filters create problem of coalescing? We have filters in series. first prefilter is 10 micron and second filter is 5 micron. naturalgas01
  2. naturalgas01

    Caustic+NGL filtration

    What size of micron size filter required to filter Caustic from NGL stream ? We have problem of Caustic carryover with NGL product. We use 10 micron size cartridge filter at downstream of Caustic+NGL tower to separate caustic particles. Design capacity for filter assembly is not a problem. I...
  3. naturalgas01

    Centrifugal Compressor capacity & head

    chicopee, it's a Centrifugal Compressor
  4. naturalgas01

    Centrifugal Compressor capacity

    Recently i have been working on compressor performance calculation, and this is first time i am working on compressor. I know that increase in suction pressure increases compressor capacity,acfm. As suction pressure increases, we are on left side of the performance curve so actual volume going...
  5. naturalgas01

    Centrifugal Compressor capacity & head

    Recently i have been working on compressor performance calculation, and this is first time i am working on compressor. I know that increase in suction pressure increases compressor capacity,acfm. As suction pressure increases, we are on left side of the performance curve so actual volume going...
  6. naturalgas01

    low suction pressure at the pump

    thanks to everyone, it's 10 Psi (not in Psig), and it's multistage centrifugal pump. Pressure increases with flowrate in NPSHr curve Suction to the pump comes from the storage tank. Storage tank pressure fluctuate as i mentioned between 75 to 165 psig. elevation is appx 10 ft. liquid is...
  7. naturalgas01

    low suction pressure at the pump

    Hi all, We have pump that design for 150 psig suction pressure. In normal operation pump run at this design pressure. But sometimes because of upstream variation suction pressure change from 75 psig to 165 psig. pump manufacturer supplied NPSHr curve. NPSHr for this pump is 10 psig. My...
  8. naturalgas01

    Brake HP and Motor HP calculation/understanding

    thanks BigInch (Petroleum), but,when valve is 100% close, head is maximum and flow is zero. So from the hydraulic hp = 0 ? then MHP = 0 ? how do you explain this ? thanks
  9. naturalgas01

    Brake HP and Motor HP calculation/understanding

    Thanks waross (Electrical)& BigInch (Petroleum), can you explain this scenario : how my Motor HP(and electric bill) will vary suppose(considering pump can generate maximum 400 gpm flow(1100 ft head) and maximum 1650 ft head(@zero flow) : (1) if I close the pump discharge valve, ie at zero-flow...
  10. naturalgas01

    Brake HP and Motor HP calculation/understanding

    Thanks BigInch (Petroleum) please see my comments and things that confused me in reply to 786392. In my plant, my pump BHP require is only 25. But my connected motor HP is 50. When I asked to my electrical department in the plant, "he told me that it doesn't matter what kind of motor size/HP...
  11. naturalgas01

    Brake HP and Motor HP calculation/understanding

    thanks 786392 (Petroleum), For energy bill, we consider the MHP. And it depends on Voltage, Amperage, PF and efficiency of motor. So, when you start pump/motor the which parameters remain constant are: Voltage, efficiency and PF ? So, depending on the head and flowrate generated by pump, your...
  12. naturalgas01

    Brake HP and Motor HP calculation/understanding

    Hi all, I have confusion in power calculation for the pump. I know that Motor HP is the indicator for power consumption/energy bill when running the pump. In one of my project for selection of the pump, I know following things : (1) my motor HP required is 50 (2) my brake HP is depending on...
  13. naturalgas01

    pump selection for liquid propyelne

    what kind of pump and manufacturer should be recommended for liquid propylene at saturated condition ? how can i size the pump for boiling propylene at 27 psig ? what should be suction and discharge piping diameter ? thanks naturalgas01

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