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Price range: £1,500.98 through £1,560.40 Excluding VAT
The FLUX F 425 drum emptying pump is engineered for maximum liquid recovery, achieving up to 99.9% drum emptying and thereby reducing waste and disposal costs. Equipped with a manually operated non‑return valve, the pump prevents drain‑back before removal from the drum, minimising spills and improving operator safety.
**Assumes the drum is tilted.
The FLUX F 425 is a vertical axial flow pump that operates with a detachable electric or compressed-air motor.
The pump uses a replaceable coupling star to transfer motor torque, while its low-cost design allows operators to change the wear component quickly with a flat-bladed screwdriver.
Inside the pump, a threaded driveshaft runs through a series of bearings that the inner tube houses. Furthermore, a ceramic-oxide mechanical seal prevents liquid from entering the inner tube while allowing the impeller to rotate smoothly.
The F 425 features a manually operated flow-back stop valve located directly beneath the impeller. Two handles positioned at the top of the pump tube allow the operator to open or close the valve during operation.
A thumb-operated locking mechanism secures the valve in position, therefore allowing the operator to close the valve before switching off the motor.
This simple but effective valve arrangement helps operators control the transfer process more effectively, particularly in applications that demand cleanliness, maximum product recovery and also spill prevention.
The FLUX F 425 drum emptying pump is designed for applications where product recovery and operator safety are critical. It is particularly suited to high-value liquids, hazardous chemicals and manufacturers requiring minimal waste.
Application | Details |
| Cosmetics & personal care | Recovery of high-value fragrance oils, perfumes and also specialty ingredients. |
| Pharmaceutical manufacturing | Transfer of valuable raw materials where cleanliness and waste reduction are essential. |
| Petrochemical processing | Handling flammable or hazardous liquids using Ex-approved Stainless Steel 316 and Hastelloy C versions. |
| Paints, inks & coatings | Efficient emptying of drums containing expensive coating materials and additionally additives. |
| Chemical dosing & batch processing | Controlled transfer of chemicals for precision dispensing applications. |
| Hazardous liquid handling | Suitable for toxic, flammable and dangerous liquids where spill prevention is a priority. |
| Contamination-sensitive operations | Ideal for processes requiring strict control and product protection. |
| High-value liquid recovery | Maximises product yield whilst also minimising residual waste and disposal costs. |
This combination of improved product recovery, enhanced safety and operator control makes the F 425 a popular choice in cosmetic, pharmaceutical, petrochemical and additionally precision manufacturing applications.
The FLUX F 425 drum emptying pump is designed for efficient liquid recovery from drums and IBCs.
Available in a choice of Polypropylene, Stainless Steel 316 Ti and Hastelloy C materials, these pumps are consequently ideal for handling high-value, hazardous and sensitive liquids.
Specification | Details |
| Pump | F 425 drum emptying pump with ceramic-oxide mechanical seal |
| Pump | Vertical axial flow centrifugal pump (optional high pressure, semi-axial model available) |
| Ex classification | Ex II 1/2 G c IIB T4 (Stainless Steel and Hastelloy C versions only) |
| Outer tube material | Polypropylene (PP), Stainless Steel 316 Ti, Hastelloy C |
| Inner tube material | Steel-cored overmoulded PP, Stainless Steel 316 Ti, Hastelloy C |
| Driveshaft material | Hastelloy C or Stainless Steel 316 |
| Impeller | ETFE axial impeller (optional semi-axial Z impeller) |
| Mechanical | Ceramic-oxide mechanical seal |
| O-rings | FKM (optional FFKM or EPDM available) |
| Immersion lengths | 700 mm*, 1000 mm (200-litre drums), 1200 mm (1000-litre IBCs) |
| Outer tube diameter | 40-50 mm (depending on material and configuration) |
| Outlet* | G 1¼” A BSPP |
| Compatible motors | F 414, F 416 Ex, FEM 4070, F 457, F 458, F 460 Ex, FBM 4000 Ex |
| Maximum flow rate | Approx. 120 L/min** |
| Maximum discharge head | Approx. 26 mWC** |
| Maximum* | Approx. 1,000 mPas |
| Maximum density | Approx. 1.8 g/cm³ |
| Maximum liquid temperature (PP) | 50°C |
| Maximum liquid temperature (Stainless Steel) | 100°C |
| Maximum liquid temperature (Hastelloy C) | 120°C |
| Dry-running capability | Not suitable for sustained dry running |
| Solids handling | Handles small solids in suspension |
| Hose connection | Supplied separately |
*Available upon request.
**Measured with water at 20°C under open-flow conditions. Performance depends on liquid properties, motor selection and additionally pump configuration.
The FLUX F 425 drum emptying pump can be powered battery, electric or compressed air motors. Optional accessories are available to suit different liquids, operating environments and safety requirements.
Benefit | Details |
| Reduced waste and cleaning costs | Ideal for high-value liquids |
| No spillages or leaks | When transferring between containers |
| ATEX-compliant models available | For highly flammable liquids and Zoned area use |
| Suitable for running against closed valve | Eg. hand nozzle or dispensing valve |
| Minimal environmental impact | Prevents drips, drain-back and spills |
| Polypropylene model with unique steel-cored inner tube | For enhanced strength and stability at elevated temperatures |
| Double radial shaft seals | Keep corrosive vapours out of the motor coupling area |
| Heavy duty 6 mm driveshaft | For ultimate resistance to radial loads |
| Suitable for high temperature applications | Up to 120 deg C (depending on model) |
| **Assumes the drum is tilted during emptying. | |
Polypropylene (PP) is suitable for water-based solutions and neutral, acidic and alkaline liquids. Stainless Steel 316 Ti is typically selected for flammable liquids, while Hastelloy C provides excellent resistance for particularly corrosive chemical handling applications.
Yes. The F 425 is available with immersion lengths suitable for both standard 200-litre drums and also 1,000-litre IBCs.
This pump is specifically designed for applications where maximum product recovery and minimal waste are important, such as fragrances, cosmetic ingredients and speciality chemicals.
