The JuniorFlux F 314 is your simple, efficient solution for safe chemical transfer. This lightweight 25 litre drum pump is primarily designed to transfer pure, low-viscosity liquids from small containers, narrow-necked barrels and carboys. Furthermore, this compact barrel pump features a class-leading axial-rotor design and the reliable FEM 3070 two-speed electric motor. This combination provides continuous-duty operation and variable flow control in a compact, ergonomic design.
F 314 pumps use virgin polypropylene, PVDF, or 316 Ti stainless steel in their construction. They handle pure, non-crystallising liquids, even those containing a few solid particles. Its seal-less design allows the pumped liquid to enter the inner tube and shaft bearings; however, the Hastelloy C driveshaft and PTFE bearings provide optimal chemical resistance. Furthermore, the seal-less design eliminates the requirement for preventative seal replacement, reducing ownership costs. In addition, this barrel pump features our unique spiral driveshaft bearing, providing optimal driveshaft support and enhanced inner tube drainage. Lastly, these pumps are 100% manufactured in Germany to the highest engineering standards. In summary, F 314 pumps are a cost-effective, industrial quality solution for transferring a wide range of chemicals in manufacturing, water treatment and chemical dispensing applications.
Firstly, the Flux JuniorFlux F 314 is a high performance, low maintenance 25 litre drum pump for emptying smaller containers.
This ergonomic, lightweight barrel pump is designed for ease of use and enhanced operator protection. In addition, its seal-less design removes one of the most failure-prone components in pump systems: the mechanical shaft seal. By eliminating this component, the F 314 25 litre drum pump can be run continuously, without risk of seal failure, overheating, fluid leakage or additionally potential contamination.
Moreover, the pump can withstand limited periods of dry-running without risk of damage.
The F 314 pump utilises the unique Flux spiral bearing system, which allows liquid to pass into the inner shaft housing, while delivering extended axial support, excellent rotational stability and enhanced drainability. Furthermore, this innovative design maintains precise driveshaft alignment with minimal internal friction, helping extend pump life, even with tough duty cycles.
The use of high-performance plastics and alloys, including ETFE impellers, PTFE / carbon bearings and Hastelloy C driveshafts, provides resistance against aggressive chemicals and corrosive vapours. Additionally, the 230 W FEM 3070 continuous duty motor is equipped with double insulated housing, overload protection and selectable motor speed.
Furthermore, it is tough, easy-to-use and energy efficient – therefore suitable for bulk transfer and small-scale dosing tasks. Moreover, our motors are entirely manufactured and individually tested in Germany before sale. In addition, all Flux motors are approved to the relevant global standards, including CE, UKCA, GS, and UL.
Whether used in R&D laboratories, chemical handling stations, or water treatment applications, all F 314 barrel pumps are engineered to meet stringent safety standards, with the longest service intervals. Subsequently, delivering maximum return on investment for our customers.
Firstly, the F 314 25 litre pump design is particularly well suited to handling one liquid, or one particular family of similar liquids eg. alkalis. In addition, it is ideal for handling pure, non-abrasive fluids that do not contain large volume of solid particles.
However, if one pump is required for use with many liquids of different types, it may be preferable to select our JuniorFlux F 310 with mechanical seal, as this pump offers the benefit of reduced wetted surface area.
For professionals working with 25 litre containers, the JuniorFlux F 314 stands out as the most practical, robust barrel pump available. With 25 mm and 28 mm outer tube diameters, the pump is purpose-built to fit small drums and carboys, reducing the risk of spillage during insertion or withdrawal.
Furthermore, the 32 mm diameter polypropylene models provide higher flow rates and extra strength where needed. And unique Flux design features such as our spiral shaft bearing, oversize lower bearing housing and removeable foot piece deliver where it counts – reliability and serviceability.
In facilities with limited space or significant manual handling concerns, the F 314’s lightweight construction (under 2.4 kg with motor) and ergonomic handle design enables users to operate it effortlessly, with one hand. This is particularly beneficial for lab technicians, maintenance engineers, or mobile chemical service teams who require a handy pump for safe, convenient fluid transfer.
Moreover, the two-speed FEM 3070 motor allows operators to alternate between fast emptying and controlled filling into smaller containers, process vessels, reaction flasks, or storage tanks. And unlike alternatives such as diaphragm or peristaltic pumps, the convenient centrifugal, axial rotor design delivers continuous, low-pulsation flow.
Overall, the F 314 25 litre drum pump is the ideal solution for high-frequency, small-volume fluid handling, with consistent performance, great durability and low life-cycle cost.
Flux F 300 Series pumps are designed for light to medium-duty applications, particularly when portability, precision and ease of use are critical. These pumps are compact, lightweight and therefore ideal for emptying small-volume containers (25–100 litres). However, longer F 300 pumps (up to 1200 mm) are also available for emptying larger barrels and IBC’s.
Furthermore, the centrifugal design efficiently transfers low-viscosity fluids up to approx. 250 mPas. And with a range of materials to choose from, there is always an F 300 pump available for most common liquid dispensing applications, in safe areas.
In contrast, F 400 Series pumps are larger and stronger, with a range of unique design features making them suitable for heavy-duty operations. In addition, these pumps deliver higher flow rates & discharge pressure, handle more viscous fluids (up to 1,000 mPas depending on configuration), and are compatible with a wider range of drive systems—including air-operated motors, brushless electric motors and ATEX-certified models.
Custom immersion depths (up to 3,000 mm) are available to order. Moreover, there is a wider range of F 400 pump models available, including food-safe pumps, 99.9% emptying pumps and mixing pumps.
To summarise – F 300 pumps are the preferred option for those needing a simple, cost-effective but robust transfer pump, for intermittent use. These pumps prioritise low weight, minimal maintenance and ease of handling.
While the F 400 Series are serviceable, long-life designs, suitable for heavy-duty, process-critical roles requiring maximum throughput, extended system integration, custom sizing and additional certification.
The Flux JuniorFlux F 314 pump is a centrifugal pump that operates on the axial-flow principle, where a high-speed impeller generates flow within the pump’s central axis, to move the fluid upward through the tube and out via the discharge outlet. The impeller is positioned at the low-level pump inlet and is therefore directly submerged in the liquid. It is connected to an electric drive motor via a strong driveshaft.
What differentiates this pump from alternative designs is its seal-less construction, whereby the liquid flows directly along the drive shaft and through the bearing surfaces. This removes the requirement for a mechanical shaft seal – a benefit in terms of leak resistance and reduced maintenance requirements.
At the heart of the design lies the Flux spiral bearing system, which maintains precise shaft alignment and rotational balance, even as the fluid passes through. The PTFE/carbon bearings offer exceptional chemical resistance, self-lubrication and a high degree of dimensional stability under radial load. The ETFE impeller is impact resistant and compatible with volatile chemicals.
During operation, the fluid in the pump inner and outer tubes equalises with the fluid level in the container. When the user switches off the motor, pressure relief ports near the bottom of the pump tube allow liquid to drain from the inner tube.
The spiral bearing allows liquid to drain completely, minimising residual liquid volume that remains in the pump once the motor is shut down. This is a significant benefit compared to competing designs, with conventional bearings.
The FEM 3070 motor provides consistent torque delivery and can run continuously, if required. The motor is also fitted with over-current protection. It’s safe, double-insulated housing design offers eliminates the requirement for a dedicated earth connection, while adjustable speed control enables the operator to vary delivery rates.
To discuss your application, or to see whether our 25 litre drum pump is suitable for your liquid transfer, contact our sales team today. Either email us on sales@flux-pumps.co.uk, or call us on 01202 823304.
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