Upgrading our RF flexible impeller pump
23/07/2026
PumpsINOXPA recognise the importance of offering equipment that is robust, durable and compliant with current legislation, so we have upgraded our range of RF flexible impeller pumps, incorporating significant improvements in both the materials used and the configurations available. The RF flexible impeller pump can pump fluids of both low and high viscosity. Due to its design, this positive displacement pump has a high suction capacity, making it a versatile solution for a wide range of applications.
How does it work? The pump operates by means of an eccentric housing containing a rubber impeller. This impeller is designed to fit the internal geometry of the pump casing. As it rotates, the flexible blades of the impeller expand as they pass through the widest part of the casing, causing an increase in volume that creates a vacuum and facilitates the suction of liquid into the pump. As they continue their journey towards the narrowest section, these blades are progressively compressed, reducing the volume between them and forcing the fluid towards the pump outlet.
One of the key advantages of this type of pump is its ability to instantly switch the flow direction without any loss of efficiency by reversing the direction of rotation of the motor. This is particularly useful in operations such as product return or pipeline draining, enhancing overall operational flexibility.
These are the changes introduced in this new generation of the pump:
- Lantern made of stainless steel instead of painted iron improves resistance to corrosive environments and eliminates the need for paint altogether.
- Introduction of a new NEMA close-coupled version (RFN pump) makes it possible to fit NEMA motors, thereby expanding the possibilities for integration across various markets.
- Standard mechanical seal in C/SiC/FPM, replacing C/Cer/NBR, offers a better friction coefficient and therefore greater durability.
- Standard O-ring in FPM, rather than NBR, provides better chemical compatibility.
- Mechanical seals, gaskets and impellers come with EC 1935/2004 and FDA food-grade certificates as standard.
As a result of these improvements, the RF flexible impeller pump represents a robust, efficient solution that is perfectly in line with current industry standards.
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