Looking for a High Pressure/Low Volume Pump Used in a Harsh Environment

A diaphragm pump IS a positive displacement (PD) pump! There definitely are pumps that do this. An air-driven pump will only pump to the air supply pressure.

You will need an electrically-operated diaphragm or other PD pump.

Is pulsing an issue? Does the HCl addition need to be constant, or can you make additions at intervals?

For HCl, the MOC should be LDPE or PTFE for wetted parts.

Hello Mikerho,

I was thinking of a gear driven PD pump.

I don't know what you mean by Additions at the intervals?

Pulsing isn't an issue, being low volume, as long as through isn't a significant gaps. ...... anyways because there is an accumulator inline.

Every thing down stream from the pump is taken care of. We need a new pump because the pump that was put in, didn't survive.

I believe there are pumps out there, I would just like a recommendation as to what kind, and brand name.

I don't know what you mean by Additions at the intervals?

What I meant was, do you have to have a constant, exactly metered flowrate of the HCl into the process, or can you pump some in, stop, and add some more when more is needed?

It sounds like the accumulator will take care of this.

What was the last pump brand and type? Why did it fail?

'What I meant was, do you have to have a constant, exactly metered flowrate of the HCl into the process, or can you pump some in, stop, and add some more when more is needed?'

It has to somewhat consistantly metered, that was why I was thinking of a geared PD pump. I could not at this point find one with a high enough pressure. While Wilden was basically used for chemical injection.

'What was the last pump brand and type? '

I asked on the field, they didn't have an answer and was going to get back to me. That was where I was going to start.

'Why did it fail?'

From the acid, it wasn't spec'd correctly.

I had though of staging centrifugal pumps in series, but with the low flow and the possiblity with more seals of have the seals fail. I'll explian a little farther.

We are putting in what I call a day tank. We fill the day tank for the production of the day, which we will fill this day tank daily, I have to also get a pump for this to fill, I can get a manual pump (or what available for this, of which I haven't looked into as of yet. And then I'm also getting a spill containment, it didn't not have it before, in case of a seal going. I saw what looked like a spill on the concrete andit looked just torn it up.

Have gone through simular but different situations. I, hate to use this word, assumed They had a hard time specifying the pump and made a poor compromise.

I looking inside the injectors, and it was backing-up through the injector lines. I don't believe there was a check valve in it.....at least by the injector. I could not trace the line back.

This was a development project thats during into a production project and looking at it or of what I could see, we may have been using line pressure to keep that from happen.....I'm looking at the schematics right now and changing that.

You might also look at dosing pumps. We used this type of pump to add chemicals to wet process chemical solutions in the PWB industry. They can be controlled by PH, ORP, conductivity, etc.

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Morning Mikerho,

I do have another question Mike,

I also was looking into a 250 gallon tank and containment. could not find LDPE for this, but a number of manufacturers can supply tanks that are MDPE or HDPE. On there websites the material and chemical resistant. One one site 'ACE Totor Mold (Den Hartog Ind.)'

It states that HDPE has a 'A' rating, which is best ('D' being the worst). It does not react. And the end of the chart, it gives a disclaimer that they are not responcibile, Which is fine, I was getting a couple of quotes.

Another site rates HDPE as a B+, some reaction to HCl. Before I call the company, I do I like to get your opinion on HDPE for HCl.

Not of them references where they used the ratings from.

I would think that Perry's Chemical Engineers' Handbook should have this, if it does, I'll have to order it.

You might look at Cat pumps.

Cat Pumps: World Leader in Triplex High-Pressure Pumps | Home
Sorta not an endorsement.

I though of that because we have a Cat pump on our pressure washer, too bad it was a passing that got lost, Thanks, I'll look at it

Thanks all for the prompt replys,

I believe I found a hydraulic diaphragm dosing pump that'll do.

Hi
the nuclear industry (reprossessing) uses pumps that move nitric acid around at high and low volume and varying pressure. Well worth a look there.

Jiffy Rooter plumbing/Heating/solar here 23 years

look up.......( Hach Company) ......................800-227-4224 on line google it up

tell the what you need thay have it no problem

Here is an interesting link that can be useful. It solved my problem then.

https://www.haskel.com

Salu2,

Abel

Hi Try the Shriver pump company

I did a quick search on 'ceramic gear pump' - these are some of the results:

<http://pdf.directindustry.com/pdf/iwaki-europe/chemical-gear-pumps/16810-32297-_2.html>

<http://www.directindustry.com/prod/scherzinger/ceramic-gear-pumps-14631-747047.html>

<http://www.ismatec.com/int_e/pumps/p_misc/pistpump.htm>

There were many more, and then there are diaphram pumps as mentioned above ..... many ideas for you to search out ....