Hello All:
I have a question regarding the temperature limit of SA516 gr.70 for graphitization
I'm operating a reactor made from SS304 but has a body flange and blind flange made from SA516 gr.70. The operating temp of the reactor is 450 deg c - 465 Deg C
ASME section VIII, part D, section...
Hello:
Yes, this would be permanent change. I do not foresee any more changes in the future with respect to flow or head
yes, I have folks who can take care of the VFD's with regards to maintenance
I've calculated a speed of 2500 rpm to go down up to 80 feet of head. The motor is running at...
Hello All:
I have a pump which is way oversized. The pump best efficiency point is 450 gpm at 150 feet of head
My process requirement is only about 220 gpm at 80 feet
The motor horsepower is 20 hP
I want to slow down the pump to reduce flow and head
I have two options a) Trim the impeller...
I've checked the model number is Farris 26HA10-120. Per the vendor's catalogue it is a conventional spring loaded PSV without bellows
Recently we've send out the PSV out for repairs. Per the inspection and repair report, they've tested on a stand with a set pressure of 8.9 ( PSV set pressure =...
Hi All:
I have a non-code pressure vessel with a design pressure of 15 psig. The vessel has PSV set at 14.99 psig with a specified backpressure of 6 psig. The backpressure is wrongly specified since the outlet of the PSV is routed to atmosphere. The maximum backpressue the PSV can see is...
Vanuta:
I agree with Artisi, check for vibrations. This is an early detection of bearing failure before any catastrophic failure could happen. There are several companies who specializes in vibration monitoring and they can install accelerometers on the pumps to monitor axial displacement and...
LittleInch
Curve enclosed
Current demand is 220 gpm at 100 of head and the future demand could be 330 gpm at 120 feet of head max
Araza
Asif Razahttp://files.engineering.com/getfile.aspx?folder=27cd3eb9-e304-4c47-a528-0b897375b1ad&file=Pump_curve_with_VFD.pdf
Hi All:
I've recalculated the head through the system and it is 100 feet of head at 220 GPM
I've obtained new pump curves using a VFD which is enclosed herewith..
I'm thinking of utilizing a VFD to reduce the flow and head. This gives me flexibility of increasing flow and head if needed for...
LittleInch:
Have you got any experience operating a centrifugal pump in hot oil service. The temp is 380 Deg c with Therminol 72
I'm operating a high temp Dean Pump with a dual pressurized mechanical seal. And I'm having issues with seal leak
Araza
Asif Raza
LittleInch:
With the current setup the requirement is 220 GPM at 100 feet of head. With the expansion project, the requirement will increase to 330 GPM at 130 feet.
So I can trim the impeller, this way I can reduce flow
Araza
Asif Raza
Bimr:
what you would do in this scenario?
I require about 330 GPM at 130 feet of head
I'm thinking of trimming the impeller. Once i get the new curves I'll post it for discussion
Asif Raza
LittleInch:
I throttled valves at the outlet of the heat exchangers and closed the pressure control valves (bypass valve) at the end of the header. This way the discharge pressure went up and the pump was put back on the curve. Currently pump is riding very close to its BEP
Kind Regards,
Araza...
Hello Experts:
I need an expert opinion: I have a centrifugal pump running in thermic fluid service. The original design data sheet indicates the pump was sized for 300 GPM at 171 feet of diff head. The design of the pump is based existing and future expansion project. The expansion is yet to...
LittleInch:
Thanks..
Just so I'm perfectly clear. The heater pressure drop is 1 psig and the gauge is currently reading 125 psig
So the true discharge pressure near the pump discharge flange would be 125+1 = 126 psig
Thanks
Araza
Asif Raza
