Flux concentrated acids drum pumps are built in PVDF, the material you move up to when polypropylene is no longer sufficient. Concentrated sulphuric acid, strong nitric acid and similar aggressive chemicals will steadily attack a standard PP pump, whereas PVDF holds up. These are Flux 400 series pumps, so alongside the chemical resistance you get proper industrial flow rates. If your safety data sheet is making you nervous about pump materials, this is the range to look at.
PVDF offers higher chemical and thermal resistance than polypropylene, which matters twice over with concentrated acids because these chemicals are both more aggressive and often warmer in use. Flux specifically nominates PVDF for concentrated acids such as sulphuric acid. The material also copes better where a process runs above ambient temperature. Compatibility still depends on the exact chemical, its concentration and its operating temperature, so always confirm before ordering.
These pumps use a mechanical seal, which keeps the drive shaft out of contact with the liquid except at the rotor and prevents product carrying over when you change containers. On plastic pumps Flux reinforces the inner tube with a metal core, which maintains full seal function across the operating temperature range and prevents leakage and premature seal wear. That reinforcement also gives the tube the stability to support long immersion lengths. Kits cover 200 litre drums and IBCs.
If your questions have not been answered here, get in touch with our team for more information.
When the acid is concentrated, the temperature is elevated, or both. Polypropylene covers the majority of general acids and alkalis, but concentrated sulphuric acid and similarly aggressive chemicals need PVDF’s higher chemical and thermal resistance. If in doubt, send us the chemical and concentration.
PVDF is Flux’s nominated material for concentrated acids, with sulphuric acid the headline example. It also handles a broad range of other aggressive chemicals. Suitability always depends on concentration and temperature, so check against the Flux resistance data or ask our team before ordering.
It is a Flux design feature on plastic pumps. The inner tube houses the drive shaft and is reinforced with a metal core, which keeps the mechanical seal functioning correctly across the full operating temperature range. That prevents leakage and unnecessary seal wear, and it also lets the tube support much longer immersion lengths.
A mechanical seal stops liquid carrying over when you swap containers, which is useful where a pump serves more than one chemical or where the liquid tends to crystallise. It also copes better with abrasive content. Sealless designs have their own advantages, and our team can talk through which suits your duty.
Absolutely! If you’re unsure which pump is the best fit for your application, our team is here to help. You can pop up to our live chat for instant support, or simply send your requirements and pump details to sales@tfpumps.com. One of our experts will quickly recommend the most suitable pump for your needs.
