Watson-Marlow 521 Series Mid-Flow Close-Coupled Pumps | Watson-Marlow Process Pumps


521 Series Mid-Flow Close-Coupled Pumps

Tough and compact 521 series close-coupled pumps are ideal for process and industrial applications, for 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.

Please refer to 521 Series Brochure for overview.

521F/R2C fixed-speed close-coupled pumps

  • Flow rates from 0.26 ml/min to 4600 ml/min.

  • Clutched rotor for rapid and effortless tube loading.

  • IP55 protection.

  • 0.18kW 3-phase 50Hz industrial motor/gearbox.

  • 24-hour-duty rated.

  • Chemical and knock-resistant finish.

  • Two-year full warranty.

New 520R2C pumphead features PPS (Polyphenlene sulphide) track and rotor with stainless steel occlusion rollers to resist chemical attack and abrasive wear. Accepts six tube bore sizes without adjustment. 2.4mm thick wall tubing for higher pressure or higher viscosities.

521VI/R2C variable-speed close-coupled pumps

  • Flow rates from 2.6 ml/min to 4400 ml/min.

  • Varmeca integral inveter offering 10:1 control ratio.

  • Stop/forward/reverse control and analogue or digital remote control.

  • IP55 protection (IP65 up-grade available).

  • 24-hour-duty rated.

  • Clutched rotor for rapid and effortless tube loading.

  • 230V 1ph supply (110V option available) 0.25kW industrial motor/gearbox.

  • Chemical and knock-resistant finish.

  • Two-year warranty.

New 520R2C pumphead features PPS (Polyphenlene sulphide) track and rotor with stainless steel occlusion rollers to resist chemical attack and abrasive wear. Accepts six tube bore sizes without adjustment. 2.4mm thick wall tubing for higher pressure or higher viscosities.

521I/R2C duplex variable speed pumps

  • Flow rates from 25 ml/min to 4.6 litre/min.

  • 10:1 control ratio.

  • IP55 protection, 24-hour-duty rated.

  • 0.18kW industrial motor/gearbox.

  • Supplied with 0.25kW Siemens vector inverter 1ph supply.

  • Chemical and knock-resistant finish.

  • Two-year full warranty.

New 520R2C pumphead features PPS (Polyphenlene sulphide) track and rotor with stainless steel occlusion rollers to resist chemical attack and abrasive wear. Accepts six tube bore sizes without adjustment. 2.4mm thick wall tubing for higher pressure or higher viscosities.

521P/R2C variable pneumatic close-coupled pump

  • Flow rates from 12ml/min to 4.0 litre/min.

  • Variable speed, high torque, reversible four vane pneumatic motor.

  • Clutched rotor for rapid and effortless tube loading.

  • 24-hour-duty rated.

  • Chemical and knock-resistant finish.

  • One-year full warranty.

New 520R2C pumphead features PPS (Polyphenlene sulphide) track and rotor with stainless steel occlusion rollers to resist chemical attack and abrasive wear. Accepts six tube bore sizes without adjustment. 2.4mm thick wall tubing for higher pressure or higher viscosities.

521FX/R2C duplex fixed-speed pumps

  • Dual 520R2C pumpheads for balanced flows in two channels.

  • Flow rates from 0.26-3300 ml/min per channel.

  • Clutched rotor for rapid and effortless tube loading.

  • IP55 protection, 24-hour-duty rated.

  • 0.18kW 3-phase 50Hz industrial motor/gearbox.

  • Chemical- and knock-resistant finish.

  • Two-year full warranty.

New 520R2C pumphead features PPS (Polyphenlene sulphide) track and rotor with stainless steel occlusion rollers to resist chemical attack and abrasive wear. Accepts six tube bore sizes without adjustment. 2.4mm thick wall tubing for higher pressure or higher viscosities.

521IX/R2C duplex variable-speed pumps

  • Dual 521R2C pumpheads for balanced flows in two channels.

  • Flow rates from 0.26-3300 ml/min per channel.

  • IP55 protection, 24-hour-duty rated.

  • 0.18kW industrial motor/gearbox.

  • Supplied with stand-alone 0.25kW Siemens Vector inverter 230V 1ph supply.

  • Chemical and knock-resistant finish.

  • Two-year full warranty.

New 520R2C pumphead features PPS (Polyphenlene sulphide) track and rotor with stainless steel occlusion rollers to resist chemical attack and abrasive wear. Accepts six tube bore sizes without adjustment. 2.4mm thick wall tubing for higher pressure or higher viscosities.

521DF/R2C flameproof fixed-speed pumps

  • Flow rates from 0.26ml/min to 4.6 litre/min.

  • Clutched rotor for rapid and effortless tube loading.

  • EExd ATEX approved, 0.25kW 3-phase 50Hz industrial motor/gearbox.

  • IP55 protection, 24-hour-duty rated.

  • Chemical and knock-resistant finish.

  • Two-year full warranty.

New 520RC pumphead features PPS (Polyphenlene sulphide) track and rotor with stainless steel occlusion rollers to resist chemical attack and abrasive wear. Accepts six tube bore sizes without adjustment. 2.4mm thick wall tubing for higher pressure or higher viscosities.

521DV/R2C flameproof variable speed pumps

  • Flow rates from 5.5 ml/min to 4.2 litre/min.

  • Clutched rotor for rapid and effortless tube loading.

  • Mechanical belt variable drive, 5:1 control ratio.

  • EExd ATEX approved, 0.25kW 3-phase 50Hz industrial motor/gearbox.

  • IP55 protection, 24-hour-duty rated.

  • Chemical and knock-resistant finish.

  • Two-year full warranty.

New 520RC pumphead features PPS (Polyphenlene sulphide) track and rotor with stainless steel occlusion rollers to resist chemical attack and abrasive wear. Accepts six tube bore sizes without adjustment. 2.4mm thick wall tubing for higher pressure or higher viscosities.

521DFX/R2C duplex fixed-speed pump

  • Dual 521R2C pumpheads for balanced flows in two channels.

  • Flow rates up from 0.26-3300 ml/min per channel.

  • Clutched rotor for rapid and effortless tube loading.

  • IP55 protection, 24-hour-duty rated.

  • EExd ATEX approved, 0.18kW 3-phase 50Hz industrial motor/gearbox.

  • Chemical and knock-resistant finish.

  • Two-year full warranty.

New 520RC pumphead features PPS (Polyphenlene sulphide) track and rotor with stainless steel occlusion rollers to resist chemical attack and abrasive wear. Accepts six tube bore sizes without adjustment. 2.4mm thick wall tubing for higher pressure or higher viscosities.


York Fluid Controls Limited, York, Fluid, Controls, Limited


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