Why choose a semi-open impeller pump?
We’re not talking about just any technology, but a robust and reliable solution, with performance ensured by thorough testing and impressive versatility. These pumps can self-prime up to 7.5 meters without the need for a foot valve, allowing for “high and dry” installations far from hazardous or unsanitary environments.
The semi-open impeller allows space for suspended solids, drastically reducing clogging. Maintenance is simple and cost-effective, thanks to front access that enables quick cleaning and part replacement without removing the pump from the system.
Most common applications
The possibilities are numerous. Here are just a few examples:
- Wastewater and light sludge (municipal and industrial)
- Industrial processes with fluids containing debris, foam, and all types of suspensions
- Cleaning and decontamination of industrial systems (pipes, reactors, tanks)
- Extraction and transfer from pits, open tanks, or cisterns
- Wastewater with sand, fibers, oils, or food residues
- Agricultural or livestock slurry
- Flood protection for industrial and residential areas
- Marine applications: on-board handling of heavily polluted bilge water or seawater transfer in ballasting operations
- OEM uses: service on tankers, sprayers, concrete mixers, and machinery for construction or forestry (with hydraulic power supplies)
- Your application: Tell us how you use Varisco pumps — help expand our list of applications!
Case Study
A company in the agri-food sector dealt daily with wastewater containing organic residues. The most frequently reported issue was pump clogging and the constant need for maintenance, which impacted productivity.
The solution? Varisco self-priming pumps with semi-open impeller.
Results:
- Clogging eliminated
- Maintenance time reduced by 40%
- Stable performance despite variations in suspended solids
Built to withstand anything
- Materials: cast iron, stainless steel, or mixed combinations
- Electric versions with motors from leading brands (IEC – CEI compliant)
- WEG W22 Premium close-coupled for inverter use, CE, UL, CSA, and EAC certified
- All pump models available in ATEX versions for explosive environments
- Hydraulic power options available for off-road applications
Working with challenging fluids?
Don’t let inadequate technology hold back your productivity. Discover Varisco’s self-priming centrifugal pumps — J Series and ST-R Series — and tell us about your application. Together, we’ll find the perfect pumping solution for your needs.
Removing pump inspection cover for cleaning operations - phase no. 1
Removing pump inspection cover for cleaning operations - phase no. 2
Removing pump inspection cover for cleaning operations - phase no. 3
