The new Watson-Marlow 521 series close-coupled pumps are tough and compact, making them ideal for process and industrial applications, in general metering and dosing duties, particularly in water and waste treatment. - 521F/R2C pumps have fixed speed drives
- 521VI/R2C pumps have Varmeca variable speed drives
- 521I/R2C pumps have inverter controlled drives
- 521P/R2C pumps have pneumatic drives
- 521FX/R2C duplex pumps have fixed speed drives
- 521IX/R2C duplex pumps have inverter controlled drives
- 521DF/R2C pumps have fixed speed flameproof drives
- 521DV/R2C pumps have variator controlled flameproof drives
- 521DFX/R2C are fixed speed flameproof duplex pumps
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