Pump selection
Pump selection
(OP)
i have a tank of 550m3 volume and i want to fill this with water. how can i select a suitable pump.
i did some working on it. i determined its flowrate. i supposed that time required to fill this tank is 10hours, so i got pump flowrate. how can i determine its inlet and outlet dia (flange inner dia). is there any need to consult any pump catalogue and select my suitable pump (as per my requirements). then according to this pump i select my piping.
Please guide me.
thanks
i did some working on it. i determined its flowrate. i supposed that time required to fill this tank is 10hours, so i got pump flowrate. how can i determine its inlet and outlet dia (flange inner dia). is there any need to consult any pump catalogue and select my suitable pump (as per my requirements). then according to this pump i select my piping.
Please guide me.
thanks





RE: Pump selection
Then compare the quotes you get for performance, delivery and price.
RE: Pump selection
Did you know that 76.4% of all statistics are made up...
RE: Pump selection
how can i calculate pipe size, i have only one input and that is volume flowrate, but i dont have the velocity. please guide me if u have any solution or formula.
actually tank is 25m high and having a dia of 5.5m. i want to fill the tank from the bottom. so its mean it has a head of 25m and the pump should have to supply water at that pressure head.
the tank is open to atmosphere. i want to calculate the NPSHa too. how can i determine the tank pressure or i should take the absolute pressure same as atmosphere during calculating NPSHa.
thanks
RE: Pump selection
Where will the pump be located? What material will the pipe be made from?
RE: Pump selection
pie material will be of CS or may be MS.
RE: Pump selection
RE: Pump selection
RE: Pump selection
RE: Pump selection
Q = VA
If the tank is open to atmosphere then you have approx 14.7 psia. This equates to roughly 34 ft (14.7 x 2.31) available being open to atm.
NPSHa = Ha - Hvpa + Hst - Hfs
Ha = Head being open to atm (34 ft)
Hvpa = Head in ft corresponding to the vapor pressure of the fluid
Hst = Static height in ft that the liquid supply level is above or below relative to the pump CL or impeller CL (depends on type of pump)
Hfs = All line losses (friction loss and velocity head loss) up to the suction flange of the pump.
Good link
http://www.eng-tips.com/viewthread.cfm?qid=30500
Did you know that 76.4% of all statistics are made up...
RE: Pump selection
Did you know that 76.4% of all statistics are made up...
RE: Pump selection
i want to fill the tank from bottom because, i want to empty the tank to the same tank from i will pump the water, you can say both tanks will interchange the water.
for this purpose can i use one pump?. by using piping arrangements but the pump suction and discharge will remain same only bypass piping will be made
thnks
RE: Pump selection
RE: Pump selection
RE: Pump selection
With discharge into the bottom of the tanks you may need to include a flow control valve in the system to take account of the change in pumping conditions as the levels change in the two tanks. You start with a high suction head/ low delivery head, and progress to a low suction head/high delivery head situation. (Gravity flow should even work for a while.) With a flow control valve, the pump won't have to be capable of such a wide flow capability.
But here's me thinking centrifugal pump - maybe a positive displacement pump would be a better choice, with motor selection based on the maximum differential head?