FELUWA’s double hose-diaphragm pumps set new benchmarks for reliability, containment, and efficiency in demanding chemical and mineral processing applications.
Safety, reliability, and efficiency are paramount in the chemical and process industries. Pumps must handle abrasive, aggressive, and even toxic media under extreme conditions – often at high pressures and temperatures.
Meeting these challenges requires not just rugged equipment, but innovative engineering.
FELUWA Pumpen GmbH, a German specialist in positive displacement pumps, has redefined what’s possible with its MULTISAFE double hose-diaphragm technology – a design that delivers unrivalled containment, longevity, and performance in demanding chemical applications worldwide.
A new generation of diaphragm technology
At the heart of every FELUWA MULTISAFE pump lies a double hose-diaphragm – two concentric, independently operating diaphragms made from high-performance elastomers such as NBR, HNBR, EPDM, FEP, or PTFE (Teflon).
This configuration creates two hermetically-sealed barriers between the process medium and the hydraulic system, ensuring that the conveyed product never contacts any metallic or hydraulic components. The result: zero leakage, maximum operator safety, and outstanding resistance to wear, corrosion, and chemical attack.
Because only the check valves are subject to wear, operators benefit from exceptionally long service life, excellent mean time between repair (MTBR) and failure (MTBF), and low total cost of ownership.
FELUWA’s commitment to reliability extends beyond mechanics. The hose-diaphragm guard (HDG) system continuously monitors the condition of both diaphragms via a simple pressure switch or sensor.
If a rupture occurs, an alarm is triggered immediately, yet the pump can continue running safely on the remaining hose-diaphragm until planned maintenance.
This fail-safe concept guarantees uninterrupted operation even in the most critical applications.
FELUWA’s modular design system allows each pump to be precisely tailored to process requirements. Various gearbox sizes, drive types, and pump head numbers can be configured to achieve flow rates up to 1000m³/h and pressures up to 350 bar.
This flexibility makes MULTISAFE pumps the ideal choice for complex and variable applications – from autoclave feeding to concentrate transport and spray dryer operation.
Notable applications include:
Autoclave feeding: In high-pressure digestion processes, FELUWA pumps handle abrasive and aggressive slurries with ease, providing leak-free operation and maximum wear resistance.
Spray dryer feeding: Low-pulsation, abrasion-free conveying ensures high product purity and consistent quality. Frequency converter-controlled drives allow precise flow control and gentle handling of sensitive suspensions.
Concentrate transport: When pumping solids-laden media over long distances, the double hose-diaphragm design enables energy-efficient, water-saving operation and long service intervals.
Filter press feeding: FELUWA’s robust, pressure-retaining design enables the pre-compaction of filter cakes and maintains high final pressures without compromising flow – even in heavy-duty environments.
The following installations highlight FELUWA’s adaptability:
Case 1: Two MULTISAFE TG 100 – 3 DS 2 pumps operating at 112 bar and 90°C, with wetted parts made from ceramic, Hastelloy B3, and FEP, handle highly corrosive media efficiently while minimising material costs.
Case 2: A TG 70 – 3 DS 2 pump delivers polyaluminium chloride slurry to a spray dryer at 60 bar and 120°C. Here, titanium-wetted components provide the necessary resistance to extreme temperature and chemical conditions, demonstrating FELUWA’s ability to engineer process-specific solutions.
FELUWA was also recently engaged to deliver pumps for Australia’s first autoclave gold processing facility at the Hemi gold project in Western Australia, set to the first Tier 1 gold in mine in the Pilbara. The pumps will feed solids-laden fluid at high pressure into autoclaves, representing a showcase application for hose-diaphragm technology in mining.
Reliable by nature
From handling toxic slurries to feeding hygienic processes, FELUWA’s MULTISAFE pumps have earned a global reputation for pumping what others cannot. Their combination of double containment, long service life, and modular flexibility delivers tangible benefits across the chemical, petrochemical, and mineral processing industries.
For operators seeking a proven, low-maintenance solution for demanding conveying tasks, FELUWA’s MULTISAFE technology represents not just a pump, but a new standard in process safety and reliability.
For more information, visit feluwa.com
This feature appeared in the Summer 2025/26 edition of Pump Industry.
