Chemical Barrel Pump – Flux F424 Drum Pump for Acids & Alkalis

The Flux F 424 PP chemical barrel pump is the class-leading, seal-less pump engineered for the safe and efficient transfer of aggressive acids, alkalis and corrosive chemicals from 200-220 L drums and 1000L IBCs. Featuring a heavy-duty polypropylene pump housing, chemically resistant ETFE impeller and a reversible, high-strength Hastelloy C driveshaft, F 424 PP consequently offers class-leading service life with minimal maintenance requirements. Designed specifically for non-crystallising, low-viscosity fluids, the F 424 PP is designed around the unique Flux spiral PTFE shaft bearing system that enhances driveshaft support, reduces vibration and promotes drainage. Furthermore, the absence of a mechanical seal in the fluid path allows the pump to dry run for limited periods, a significant factor in reducing repair and maintenance costs. The F 424 PP chemical barrel pump has been tested and approved by world-leading chemical manufacturers. Consequently this pump is the ideal choice for chemical transfer in production, water treatment and laboratory applications.

Pump type: Flux F 424 PP-41/36, seal-less

Outer tube material: Polypropylene (PP)

Driveshaft: Hastelloy C with 6 mm diameter for maximum vibration resistance

Inner tube: Polypropylene

Bearing: Unique Flux PTFE spiral driveshaft bearing

Impeller: ETFE axial impeller

Immersion lengths: 1000 mm (for 200-220 l drums) or 1200 mm (for 1,000 l IBCs)

Outer tube diameter: 41 mm

Alternative FFKM or EPDM o-rings available on request.

Motor type: FEM 4070, brushed commutator, variable speed

Power supply: 230V 50Hz

Ingress protection: IP24

Power rating: 500W

Duty cycle: S1 continuous duty

Housing type: Single-wall, internally cooled, double insulated

Housing material: Polyamide

Cable length: 5 m

Plug Type: UK 3-pin plug adaptor included

Alternative 110V motors and compressed air motors available on request.

Hose: PVC, DN19, 2 m length with polypropylene hose connection

Hand nozzle: Polypropylene hand nozzle with FKM seals

Compression gland: Polypropylene G2″ male thread

Also includes: 2 hose clips and Flux clip for hand nozzle stowage

Max flow rate: Approx. 60 LPM1

Max discharge pressure: Approx. 9.5 mwc

Maximum liquid temperature: 50 degrees C

Max density: 1.5 kg/L

Max viscosity: Approx. 600 mPas

Solids: Not suitable for large quantities of solid particles (see model FP 430)

* measured using water at 20°C with hose and hand nozzle connected.

Seal-less design for maximum chemical purity

Firstly, the Flux F 424 chemical barrel pump features a seal-less construction with no wetted o-rings. This therefore eliminates the risk of mechanical seal failure, which could, in the worst case, lead to contamination of the pumped media.

Advanced vibration and wear resistance

The key feature of the F 424 pump design is it’s unique PTFE spiral shaft bearing. The shaft is further supported by four thick bushing rings and two heavy-duty radial lip seals. This construction virtually eliminates shaft deflection, reduces bearing load and further aids mechanical stability. Therefore, the result is class-leading longevity with extended service intervals.

High-performance materials for chemical resistance

The pump housing is constructed from high quality, virgin polypropylene, consequently providing excellent resistance to a wide range of corrosive media. Furthermore, the impeller is moulded from ETFE – a mechanically stable, chemically inert fluoropolymer. The Hastelloy C shaft adds exceptional strength and chemical resistance, especially against oxidising agents. In addition, the hand nozzle is again, high strength PP material, fitted with FKM o-rings. The o-rings can be switched to EPDM if required, for resistance to alkalis such as Sodium Hydroxide.

Engineered for long-term use

The unique Flux reversible driveshaft design doubles service life and improves shaft balance, particularly in continuous duty or high-frequency applications. The spiral bearing also promotes inner tube drainage, ensuring minimal fluid retention. As a consequence, risk of cross-contamination is lowered and requirements for cleaning or decontamination may be reduced.

Dry-run tolerant with easy maintenance

Thanks to its seal-less construction and rugged bearing design, the F 424 PP can tolerate short periods of dry running—ideal for batch production or remotely controlled operation, when containers may empty unexpectedly. Additionally, servicing is simple with the screw-on foot piece allowing rapid inspection and impeller replacement without specialised tools. Furthermore, all parts are available to buy as spares.

Chemical manufacturing and dosing

Pumping disinfectants and sanitisers

Laboratory and R&D environments

Water and wastewater treatment plants

Agricultural and horticultural chemical transfer

Dispensing cleaning chemicals

Handling detergents

Potassium hydroxide (30%)

Sodium hydroxide (30%)

Ammonia water

Acetic acid (up to 80%)

Formic acid (up to 50%)

Hydrochloric acid

Dilute nitric acid and other dilute inorganic acids

Note: F 424 is not recommended for abrasive slurries or media with high-solids content. However, for these applications, consider the Flux F 430 pump.