Good morning, I want to calcula

[ifran31]

Good morning,

I want to calculate the inner diameters of the suction and discharge of a centrifugal pump.

The installation of this pump is old and the type is centrifugal pump (suction is horizontal and discharge is vertical).

The pump was purchased without documentation and without name plate, so now the pump data is not defined (flow???).

How can I determine the flow rate in (m3 / h) of this pump? Can I use flow meter?


Thank you in advance and have a nice day

(Sorry for my English I am a beginner)

R.B (Mechanical Engineer)

 

[BigInch]

Estimate based on 6 to 7 ft/sec velocity in the suction pipe.

"People will work for you with blood and sweat and tears if they work for what they believe in......" - Simon Sinek

 

[Artisi]

How about measuring the outside diameter of the inlet and outlet pipes, what size motor and speed, what is the suction conditions and what are the discharge conditions, ie, what heads are involved. At a guess I would say that a flow meter might be a good way to find out the flowrate. If the discharge at the pipe end is visable - there are way to measure flow.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

 

[hydromech]

What size are flanges/ports on the pump...that will give you a good idea of what to use?

 

[Artisi]

Fair go, the OP can't even size the pipework.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

 

[TD2K]

There are various ways of estimating the flow rate:

1. Measure the power used by the motor and using the head developed by the pump and an assumed efficiency, calculate the flow rate.
2. If you are pumping either from a vessel or to a vessel, is it possible to shut off any external flows into or out of those vessels and measure the rise/fall in volume over a time period?
3. You can use portable ultrasonic flow meters for a lot of liquids. They strap on the outside of the pipe so you don't have to install new connections to your pipe. There may be a local company that has one that would be willing to measure the flow for you for a reasonable price.

 

[ifran31]

Good morning everybody,

Below you will find clarifications for my concern:

1)Velocity = 6 to 7 ft/sec for all production, my case is well water (existence of a quantity of salt),

2)The outside diameter of the inlet is 3” and outlet pipes is 2” (schedule I do not now),

3)I will do a calculation of diameters, speeds (inlet and outlet), delivery head and section head is the object of my concern. The input for the calculation is the lead flow,

The final idea is to install a flow meter on the discharge side of the pump and take flow values to each (01) hours for (24) hours,

please your comments,

Tanks for everybody and have a nice day,

(Sorry for my English I am a beginner),

R.B (Mechanical Engineer).

 

[Artisi]

Don't be too concerned about your English, the point is to have information that we can use to assit you.
If you need accurate flow measurement you will have to use a flow meter.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

 

[ifran31]

Artisi, thanks for your message and have a nice