×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Selecting right pump for the job

Selecting right pump for the job

Selecting right pump for the job

(OP)
I would like to install a submersible pump in my storm sewer pond (used to be a detention pond) so that I can outlet water to a county ditch. I have spoken with the county engineer and have been given the okay as long as I do not exceed a discharge rate of 0.2 cfs or 90 gpm. I would like to install an industrial model pump rather than a cheap one used in residential basements. I am currently looking at a HOMA TP28 (TP28V16/2/1) submersible pump but I am afraid that the discharge rate will be to high since my total head is only 5 feet. So my question is, how can incorporate an industrial pump with my pond drainage and meet the requirements of the county.

RE: Selecting right pump for the job

Determine the elevation range of the pond that the pump will be installed in. Determine the discharge elevation of the pump. With that information, the pump manufacturer's representative should be able to size the pump.

Install a valve on the pump discharge so that the pump may be throttled. Develop a method to measure the flow rate. Use a timer or a flow meter.

The HOMA brochure shows how the pump should be installed.

RE: Selecting right pump for the job

You need to be looking at pump curves to find the right pump for your application. Since you are working in imperial units, you should stick with pumps that give performance data in imperial units, not SI. A quick Google search for HOMA TP28 resulted in a data sheet that uses l/s and meters.

Google "submersible sump pump" and go through the results till you find what you are looking for.

RE: Selecting right pump for the job

Why only use pumps that have data presented in imperial measurements?

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.)

RE: Selecting right pump for the job

My google search found the brochure in USGPM - http://www.google.co.uk/url?sa=t&rct=j&q=&...

I would say this pump is ideal - get the V2 version at with a total head generated of 5 feet, you have a discharge rate of 90 USGPM - Perfect.

If for some reason you end up with more friction losses or a small blockage, the head increases rapidly whilst the flow stays quite high, e.g. for 20 feet head you're still getting 60 GPM

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: Selecting right pump for the job

(OP)
Thank you all very much for your input on the matter. I have decided to go with HOMA TP 28 pump and am currently working with one of their sales reps to get the setup needed for the job.

RE: Selecting right pump for the job

One thing to bear in mind is: the pump needs to be fully submerged at all times for motor cooling, therefore you might need a "sump in a sump" with level control to shut the pump off at a predetermined point - or alternately - if just one sump ,pond, or pool etc. level control is still required to safeguard the pump from overheating. You can get combined float controls for start / stop.

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.)

RE: Selecting right pump for the job

(OP)
Artisi - That was my next questions. I will be placing the pump within the sump of a sump to ensure the pump is always submerged under water. Thank you.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources