STN series single-stage magnetic drive centrifugal pumps are the close-coupled type. The thermoplastic components (PP-GF or ETFE) are injection-moulded. The Neodymium-Iron-Boron rare-earth magnets guarantee a compact coupling that is efficient even with high-density liquids.

The option of using LF graphite rotary bushings with low coefficient of friction coupled with the exclusive FTC magnetic balancing system for the internal rotor allows occasional dry operation for up to one hour.

On the other hand, the pure Silicon Carbide version allows use with liquids that contain suspended solids or are especially chemically-aggressive. Motion is transmitted by magnetic couplings, thus avoiding a mechanical connection between impeller and the driving part. This system guarantees maximum safety, reducing the risk of leakage to a minimum. Furthermore, the elimination of external transmission parts makes this series extremely compact, silent and safe even for inexperienced operators.

STN pumps offer excellent value, making then a particularly attractive proposition for builders of small systems and OEM users.

 

 

 

Technical features

Pump type	Close-coupled STN pump with motor on B3/B14 frame
Construction materials	PP / PVDF PTFE-AL2O3 / CARBOGRAPHITE / SiC FPM / EPDM / FFKM
Liquids handled	Corrosive, toxic or flamable liquids
Performances	Q max = 10 m3/h --> H max = 13 mcl
Motors	0.12 kW ( gr. 56 ) --> 0.55 kW ( gr. 71 )
Max temperature	0°C --> +70°C PP 0°C --> +80°C PVDF
System pressure	STN 4/6/10 PP = PN4 (20°C) - PN2 (70°C) STN 4/6/10 PVDF = PN4 (20°C) - PN2 (80°C)
Viscosity	200 cSt max
Pass solids	Max concentration 2 % in weight Hardness 800 Vk / Size max. 150 µm