COMMONLY PUMPED CHEMICALS

Commonly Pumped Chemicals

During a recent survey of all enquiries we received for chemical applications we found that around 50% were for a very small number of chemicals, so we thought it would be useful to run through these chemicals and list the suitable pump materials for our most commonly pumped chemicals.

Sulphuric acid

For up to 60% concentrations and temperatures up to 60⁰C we would normally select Polypropylene. With higher concentrations and temperatures up to 100⁰C we would select PVDF, ETFE or PTFE.

For a mechanically sealed pump we would use a Single PTFE / SiC / Sic external seal, and for magnetic driven pumps we would select a carbon / ceramic shaft and bearing combination.

Hydrochloric acid

For up to 36% concentrations and temperatures up to 60⁰C we would normally select Polypropylene, and higher temperatures up to 100⁰C we would select PVDF, ETFE or PTFE.

A mechanically sealed pump we would use a Single PTFE / SiC / Sic external seal, and with magnetic driven pumps we would select a carbon / ceramic shaft and bearing combination.

Nitric acid

For up to all concentrations and temperatures up to 100⁰C we would normally select PVDF, ETFE or PTFE.

For a mechanically sealed pump we would use a Single PTFE / SiC / Sic external seal.

For magnetic driven pumps we would select a carbon / ceramic shaft and bearing combination.

Sodium Hydroxide (Caustic Soda)

For all concentrations and temperatures up to 60⁰C we would normally select Polypropylene, and higher temperatures up to 100⁰C we would select ETFE or PTFE.

For a mechanically sealed pump we would use a Single MSH internal seal up to 20% concentration, and for above 20% concentration we would always advise a double mechanical seal with a pressurised external flush.

For magnetic driven pumps we would select a SiC / Sic shaft and bearing combination and (usually) ETFE casing.

So, these four liquids make up very nearly 50% of all chemical applications that we receive enquiries for. I hope this helps but, for a specific quotation, please confirm all enquiries with our sales team.

 

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