Help needed about old Harland pump curves

[jacilore]

Hello, all:

I am an industrial engineer that has posted before a couple of times in this forum with very kind and good responses from many of you, so first of all thank you.

Now I am involved in a project in order to request a government subvention for replacing old pumps by new and more efficient ones in a well. The problem is that in my case, the old one is a centrifugal horizontal “Harland” nearly 40 years old and they have requested a study comparing the curves and efficiency rates in the duty point of the old and the new ones to justify the improval.

The only data I have for the existing one is:
10-stage centrifugal
1240 ft. Head and 645 gal/min Flow at Duty Point.

And obviously because of the pump age, it turns nearly impossible to get the original documents.

So could someone find (or help me to) some rather old Harland multistage curves and or manuals to fit more or less my unit data?
(In order to make it easier, everything which can be rather similar can do, as the technicians who review the documentation are not going to get too deep on this as they just want to find data that sound logical).

Thanks very much and regards.

 

[Artisi]

Why worry about the old pump, time it was sent to the junk dealer.

The efficiency of the old unit can be estimated from the flow / head / and motor input power - no need for any pump curve.

For a new unit, simply make a selection based on the flow and head requirements.

A comparision between the actual power input of the old unit and the calculated power input of a new pump selection is all that is needed for justification.

Simple and easy, a job for the junior engineer.

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.)

 

[jacilore]

Hello, and thanks for replying so soon:

Yes, I know I have enough data to deduce efficiency, but it's all about government procedures and fancy looking documentation.

In case I don't get I will do that way, but I know if I can get the curves it will fit more with their tastes.

Regards.

 

[micalbrch]

Wasn't Harland acquired by Weir Minerals in the late 60s? Perhaps somebody at Weir can help.

 

[jacilore]

I'll have a look at it.

Thanks.

 

[JJPellin]

If you have the flow, head and motor power at any two operating points, you can generate your own set of curves to approximate the original curves. Since you don't need a high degree of accuracy, this should not be too difficult.

Johnny Pellin

 

[GPRnD]

The Harland pump designs were acquired by Weir Pumps (I know because I worked on some of them).

That part of Weir eventually morphed into Clyde Union. I'd contact them and see if they can help you.

 

[DubMac]

Clyde Union just bought up by SPX.

 

[jacilore]

Thanks all very much. I hadn't had time to reply, let alone to investigate.

Bradshsi: I hope not to need to get you more involved, but that's very kind of you. If it becomes really necessary I will ask again.

Regards