Cleaning/Flushing Chemical Dosing Pumps Maintenance

[MPP-LTD]

We are preparing SOPs for isolating Ammonia Injection Pumps (10% Aqueous Ammonia) prior to maintenance. The vendor has instructed that before maintenance of the wet side / regeant head of the pump: "flush pump thoroughly with a neutralizing liquid. Wear protective clothing and handle equipment with proper care." Is it sufficient to drain the system and flush with demineralized water for a few minutes? OR should a special chemical solution be prepared? Any information or direction would be appreciated.

Thanks,

 

[Latexman]

Ammonia has a strong affinity to water, so flushing with copious amounts of water should work well. Must it be demineralized water?

If the smell is too strong after flushing, remove the pump with PPE on, then let the pump "air out" before maintenance. This is not Methyl Ethyl Death we are talking about.

Good luck,
Latexman

To a ChE, the glass is always full - 1/2 air and 1/2 water.

 

[MPP-LTD]

We have soemthing called service water, which is demineralized water that is bascially stored in a tank and piping without any protection to preserve it's quality so maybe this will be best.

Thanks for the very practical advice!

Cheers,
G