Flux F 424 Drum Pump – Sealless, High-Performance Drum Pumps for Industry

Part numbers available

• 10-42460012
• 10-42460010
• 10-42460007
• 10-42440012
• 10-42440010
• 10-42440007
• 10-42422007
• 10-42422010
• 10-42422012

Pump type:

• Flux F / FP 424, seal-less, centrifugal drum pump 

• Ex-classification: Ex II 1/2 G IIB T4 (stainless steel version only) 

• Outer tube material: Polypropylene, PVDF, or Stainless Steel 316 Ti 

• Driveshaft: Heavy-duty Hastelloy C or stainless steel with 6 mm diameter for maximum vibration resistance 

• Inner tube: Polypropylene, PVDF, or Stainless Steel 316 Ti 

• Impeller: ETFE axial impeller. Optional semi-axial impeller available 

• Bearing material: Unique Flux PTFE spiral driveshaft bearing and oversize lower bearing housing 

• O-rings: FKM. Alternative FFKM or FEP o-rings also available (Vapour seal only) 

• Immersion lengths: 700 mm (for small containers or hobbocks), 1000 mm (for 200 l drums), 1200 mm (for 1,000 l IBCs), plus custom lengths available for special order 

• Outer tube diameter: 40 mm – 50 mm* 

• Outlet connection: G 1 1/4” A BSPP 

Special versions:

• Special AdBlue® version free of non-ferrous metals available 

• Also available in High Temperature (HT) stainless steel version for ambient temperatures up to 60°C (140°F) 

• F 424 drum pumps are suitable for use with F 414, F 416 Ex, FEM 4070, F 457, F 458, F 460 Ex and FBM 4000 Ex motors 

• Please note a hose connection is not included and must be purchased separately.  

*AdBlue® is a registered trademark of: Verband der Automobilindustrie e. V. (VDA) 

• Max flow rate: Approx. 240 L/min*1 

• Max discharge pressure: Approx. 30 mwc*1 

• Maximum liquid temperature: Approx. 50 degrees C (PP version) 80 degrees C (PVDF version) 100 degrees C (Stainless steel version) 60 degrees C (HT version) 

• Max density: Approx. 1.9 g/cm³ 

• Max viscosity: Approx.1,200 mPas 

• Dry run limitations: Suitable for limited dry running 

• Solids handling: Not recommended for handling large quantities of solid particles (see pump model F 430) 

*Measured with water at 20 degrees C in open flow condition. The maximum figures listed above are dependent on the application, fluid properties and pump configuration. Please refer to technical data sheets or performance diagrams.  

*Dependent on pump type, diameter and motor. 

Please see our comprehensive list of media examples suitable for the F 424 drum pumps, based on pump material, here.

Seal-less design

Firstly, those seeking long-term operational efficiency, minimal maintenance and the lowest whole-life cost, will find the Flux F 424 to be the superior option. Its seal-less design eliminates the requirement for a mechanical shaft seal, thereby mitigating a common cause of drum pump failure.  

Furthermore, the patented Flux spiral shaft bearing provides optimal drive shaft support at its central point, reducing radial loads that create shaft deflection and vibration. By their nature, drum pumps have long drive shafts – the better supported the drive shaft is, the lower the chance of shaft misalignment, wear and premature failure. Compare the design of the F 424 pumps with our competitors’ and you will see the difference.  

This intelligent bearing design also aids drainage, reducing the amount of residual liquid left in the pump tube and preventing the build-up any sediments—particularly important in sectors and applications that require minimal cross-contamination, or clean-in-place (CIP) capabilities. 

Reversible drive shaft

In addition, F 424 has a class-leading, 6 mm diameter, reversible drive shaft. This unique feature doubles the service life of the most expensive replacement part. Finally, the serviceable design along with a complete range of individual spare parts, puts F 424 far ahead of any competitor.