Sump Drain Pumps

Low flow high head - why not use a simple progressive cavitypump, Mono or similar?

Thanks for yoru comment...

We have limited space for locating the pump.We hardly have 1m long and 1m wide space for the same. This could be a constraint for PG Cavity pumps.. Isn't it??

No. The Pump Body is maximum 18" dia x 1 metre height. with Inlet/outlet disc check valve it will be 750mm wide so that gives you enough space width wise to connect inlet and outlet (outlet 2" pipe you will immediately take up with a bend). Maybe the packaged pump (with receiver) give problem in this space but just the pump won't.

Moreover this pump will work even if submerged in pit. However, these pump will be with Cast iron/mild steel body and you need to take stainless steel body.

Look up web sites of spirax sarco and armstrong international and you will find these pumps both in vertical/horizontal models . Horizontal will not fit in your space so you have to opt for vertical model.

If you were in Pakistan I'd have given you my Ducon Condensate power pump but it is preferable you opt from the above 2 suppliers.

Just for your keen interest, detailing sites of my pumps in operation to give you the idea. Most are working with receivers but some of my pumps are installed under Textile Bleaching machines with no receiver (because very tight space and there is height space problem- unlike yours , width space problem).

hope it solves your problem -

Ducon

Are you serious?

Can these power pumps pump to 32 bar discharge pressure as requested by the OP? I thought they were limited to around 40 m or so.

No these power pump cannot pump 32 bar.

As I understand he wants to transfer from the sump to his Pumping manifold whose pumps are pumping at 32 bar. these pumps can only drain the sump to inlet of his existing pumps operating at 32 bar.

Problem of understanding taks place due to non availability of actual p & ID drawings.

If he wants a pump at 32 bar to be installed to drain his sump and deliver at 32 bar the he should opt of submersiable pumps or something not power pumps.

In continuation to # 8. He wants to drain the sump/tank with into the suction manifold of multiphase pump which discharges 5 m3/hr at 32 bar. Am I understanding correctly ?

This is what he writes :

we are currently going for an externally mounted Pump to completely drain this tank by a pump which should take the liquid back to the suction Manifold of our Multiphase Pump @ a flow of 5m3/hr and a pressure of 32 bar.

Hope i understood correctly and recommended him his "externally mounted Pump" in that tight space.

Thanks for yur comments.

Your understanding is slightly wrong. What i mean to say is, the new sump tank drain pump shall be capable of generating a pressure of 32bar @ a flow of 5m3/hr from the tank bottom, so that the fluid will be reaching the MPP suction manifold which is currently @ 32bar pressure. Hope it's clear now...

Sorry then the Power Pump is not for this purpose.

Harisker,

That is how I understood it. Suggest that you look at a progressive cavity pump form someone like mono or a multistage ring section pump such as this one. There are many other vendors of similar type equipment. You need to see what fits, but both of these should fit the space you mention.

Yes this is what his application call for.

Thanks for your vaulable comment. I already have some quotes on Moyno Pump. I agree with you on the suitability of these pumps for the application. However i haven't seen anyone giving my advise on using Double Diapragm type pumps for using in open drain and close drain applications. I have a quote of this pump and is very compact to install in our limited space. However soem one has doubted on using diapragm pumps in open drain applications,is it a right concern?.

harisker, diaphragm pumps can be used for this service (pneumatically operated diaphragm pumps should not be used for this service because of the danger of introducing compressed air into the system - your pressure is too high for them anyway). If it is not a hazardous service then double diaphragms is a nice luxury to have as it gives warning of a failure of one of the two diaphragms if you install the between diaphragm pressure sensor. Otherwise single diaphragm is adequate.

They can be maintenance intensive, especially if you have pulsation problems, so get the pump vendor to do a study on suction and discharge line up. Even in good systems you could well be changing diaphragms more than once a year. Remember that you will get a pulsed flow, so make sure you can live with this in the downstream piping and pumping system. Also look at the metallurgy of vaves, springs and heads as well as the material of the diaphragm because you are pumping a mix of fluids. These pumps do not like too much foreign matter as it damages the valves and diaphragms.

Having read you original post again, I see you say "completely drain this tank". Note that neither of the pumps that I suggested may be run dry under any circumstances.

You may therefore wish to consider the diaphragm pump and talk to the vendor about priming and dry running condition. Again, remember that these things can pump air and would this be a safety hazard downstream?

Thanks for your excellent comments.. Here we are going to run with Electric motor, hence there is no such issue of air ingression to the system.regarding dry run, solid particles we already informed the vendors and they are very confident to use these pumps for our application.

Install a Condensate Power Pump 6.5 m3/hr capacity ideal for Pits/Sump and operate with compressed air. This Pump will will take the fluids to your existing pump manifold.

Thanks for your comments.

I missed to add one more point.. we don't have Air or gas to operate the pump. We can go only for electric driven pumps.

Take a small compressor. the pump takes only 5 cfm per stroke. when I am exhibiting in a seminar i have a small compressore and a model packaged pump assembly to demonstrate. maximum pressure to be 5 bar, if more use an air regulator 1/2".

You can search for multistage horizontal centrifugal pump or vertical in line centrifugal pumps.

go for seepex progressive cavity pump