I am very sorry for the late response but we decided on trying this pump (http://www.vogelsangusa.com/products/rotary-lobe-pumps/?L=8) (hopefully I didn't violate any terms by posting the website, I assure you I am not close with Vogelsang, they offer the trial to anyone willing to accept it)...
I am sorry I have not responded recently. I have been away for quite some time due to training and vacation. Thank you all for your input! I'll let you know what we decide on.
Regards,
Ben
micalbrch,
Thank you for the insight! Would you recommend any other type of pump for this application? Or do you think I've got it narrowed down to the most appropriate ones? I was looking into purchasing the largest Hydra-cell (I believe it is a 35 model) and running it at half capacity. The...
Artsi,
We have peristaltic hose pumps in a similar service (same fluid, same temperature, less pressure) and the hoses last 1 month at best (in fact they are on a monthly PM for change out - vendor recommended). I would expect them to last less time for this application because of the higher...
EdStainless,
The applications where we have correctly sized our DiscFlo pumps get 6-12 months of lifetime and are fairly pricey to replace (difference in lifetime result of acidic vs basic and solids content, currently reviewing MOC to eliminate metals that require passivation (sp) layers). We...
SteveWag,
We have a lot of those on site and they tend to work well enough (3 month failure rates due to high back pressures and not enough stages) but for this particular application we have a very limited foot-print (15 to 25 sq. ft. or 3' x 4' / 4' x 5'). I am sorry I left that out.
Thank...
I currently work with a 30% (wt) Alumina (Al2O3) slurry that has a relative hardness of 9 (mohs). This application is shear sensitive (and non-newtonian, shear thinning to be precise) and because of that we are using a DiscFlo pump. Unfortunately our system design leads to an unsustainable...
Thank you, I understand it much more now. Is the weld stress a function of the inner surface area of the jacket and the outer surface area of the shell?
In 'Mandatory Appendix 9 - Jacketed Vessels' there is an equation to determine the maximum jacket width based on your jacket type. This value is the maximum distance between the outer radius of the shell and the inner radius of the jacket. What is the mechanical significance of this constraint...
Thank you all for your responses, all in all I was just curious to see if there was a large difference (due to flow coefficients and the equations that govern valve systems) between setting a valve with N2 and a valve with your process. I will let you know if I find out anything more.
No, we did not simulate it. I feel this is a contributor but I am still confused as to why the pressure kept raising. It was climbing fast to the point where we would have been well above 200 psig in a couple of seconds. My understanding is that the back pressure would just be an additional...
Hi all, I have been a long time lurker and I finally have a question of my own. I am having problems with a relief system designed for a positive displacement pump. I have a proportional relief valve that is hooked to my supply tank from the discharge of my external gear pump. We set the relief...
