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Price range: £522.15 through £606.15 Excluding VAT
The FLUX F 310 Juniorflux is designed for transferring fluids from small containers, 25-litre drums and hobbocks. Ideal for simple laboratory and industrial dispensing tasks, this lightweight polypropylene pump combines practical design with robust construction.
The following part numbers are available on our online shop:
FEM 3070 brushed commutator motor, with two-stage speed control
Total weight (pump + motor): 1.8 – 2.1 kg
Please note a hose connection is not included and must be purchased separately.
*Measured with water at 20 degrees C in open flow condition
In laboratory, metal recovery & plating, or water treatment applications (e.g., dilute sulphuric acid, sodium hydroxide, dilute nitric acid, hydrochloric acid)
Such as phosphoric acid, urea solution, wastewater, waste coolant with cutting swarf.
With foaming or abrasive properties
In chemical preparation or buffer storage systems
With disinfectants or degreasers
In production areas and agricultural settings
The F 310 pump offers a strategic advantage in any operation where fluid purity, equipment longevity, and cross-contamination control are critical.
In contrast to low cost, disposable drum pumps, the F 310 incorporates a precision ceramic-oxide mechanical seal that forms a physical barrier between the pumped liquid and the motor shaft. This not only prevents ingress of fluid or solid particles into the shaft housing, but also reduces total wetted surface area, thereby reducing the risk of cross-contamination.
The use of Hastelloy C for the driveshaft is particularly relevant when handling halogenated acids, or oxidising liquids. Hastelloy is exceptionally resistant to pitting, corrosion and stress cracking in chloride-rich environments. Combined with a tough ETFE impeller and FKM o-rings, F 310 is consequently designed to meet the challenges of corrosive chemical transfer.
Moreover, the fixed FEM 3070 commutator motor is S1-rated for continuous operation, eliminating the risk of motor shut-down due to thermal overload. The selectable high / low-speed function allows the operator to vary flow rate, particularly useful when dispensing smaller amounts, or when pumping shear-sensitive fluids.
Absolutely. The Flux F 310 PP 25L drum pump, particularly when specified with the smaller 25 mm pump tube, is ideal for use in narrow-necked and small volume containers, such as 25-litre carboys, hobbocks and reagent tanks. Furthermore, with its narrow profile and short, 500- or 700-mm long pump tubes, this pump facilitates easy insertion into restricted openings.
The combination of high / low-speed control, ergonomic handle and lightweight construction provides precise, safe dispensing, even when using the pump with one hand.
The mechanically sealed design reduces wetted area, thereby removing nearly all the liquid from the container and reducing drain back. This is particularly advantageous for high-value chemicals, or when residual waste is undesirable – for cost or safety reasons, or for inventory tracking.
In addition, the pump provides excellent process control for applications involving batch filling or sample withdrawal. Finally, you can add the optional FMT120 flow meter for monitoring volumetric dispensing.
The distinction between sealed and seal-less models reflects a fundamental trade-off between ease of maintenance and fluid compatibility.
In addition, the pump has the lowest possible wetted surface area, making it a better choice when one pump is used with several different fluids. This design minimises the risk of residual fluid cross- contamination. Additionally, we find that mechanically sealed pumps handle high temperature liquids more reliably, as a result of improved dimensional stability. However, these pumps tend to be less well suited to pumping non-lubricating fluids.
Additionally, as liquid enters the inner tube, wetted surface area is greater, making this design less suitable if cross-contamination is a concern.
One final consideration – note that mechanically sealed pumps can only tolerate dry running for short periods as the mechanical seal may overheat, thereby leading to premature failure. Seal-less pumps can be run dry safely for longer periods, however, extended dry running can still cause bearing failure.
The F 310 25l drum pump is a centrifugal axial rotor design, where an impeller rotating at high speed (typically 8 – 10,000 RPM) drives the media vertically up through the pump tube. The impeller is mounted as close to the pump inlet as possible, ensuring that almost all the liquid is removed from the container.
At the heart of the pump lies the mechanical seal assembly, which is located between the impeller and the inner pump tube. This assembly comprises a fixed ceramic face, rotating ceramic face, spring assembly and an elastomeric FKM o-ring. Consequently, the rotating face turns at high speed with the impeller, and the spring maintains a consistent seal between the two ceramic faces, stopping liquid from entering the inner tube.
When the motor is engaged, the impeller induces axial flow, moving the liquid from the bottom of the container up through the pump body and out via the threaded side outlet port. Long-life, low friction bearings support of the driveshaft, including a heavily reinforced lower bearing, designed to eliminate vibration.
Because only a short length of the driveshaft is exposed to the liquid (between the impeller and mechanical seal) the rest of the shaft and the bearings are completely protected from chemical attack, crystallisation and wear associated with ingress of solid particles.
The ETFE impeller maintains dimensional stability and hydrodynamic efficiency, while providing exceptional resistance to chemicals, including acidic and alkaline solutions. The two-speed drive motor provides additional flexibility, for use across a range of container sizes and flow rate requirements. The operator can toggle between high-speed (for fast emptying) and low-speed (for controlled filling).
