Liquid Handling Pumps from Watson Marlow Pumps Group

520R2 NEMA 4X (IP66) Continuous Tubing Pump -- Model 520DuN/R2

520R2 NEMA 4X (IP66) Continuous Tubing Pump -- Model 520DuN/R2 -- View Larger Image
520R2 NEMA 4X (IP66) Continuous Tubing Pump -- Model 520DuN/R2-Image
  • Flow rates up to 55.5 gph at 30 psi peak pressure with 520 LoadSure elements
  • 520REL pumphead features large swept volume with sprung rollers for high accuracy
  • Brushless motor, 2200:1 turndown, 0.1% set speed accuracy
  • Large speed/flow display and easy to use tactile membrane keypad. Incorporates keypad lock
  • Manual control with comprehensive flow rate calibration by volume or weight
  • Value for life:the lowest cost of ownership
  • Inputs: Analog 0-10V / 4-20mA software configurable and calibrated
  • Speed scaling by keypad or second analog input for drop in replacement of diaphragm pumps
  • Inputs: 4 pump status inputs all accepting 5V TTL or 24V industrial logic
  • RS232 network control of up to 32 pumps - PROFIBUS DP now available
  • Outputs: 4 relay outputs, up to 30V and 30W, user configured
  • Outputs: 0-10V, 4-20mA analog or 0-1258Hz speed indication output
  • Run time counter for enhanced process monitoring
  • Dual voltage, 115V/230V 50/60Hz and 24 hour duty rated

A Watson-Marlow Value for life pump with five year warranty.

Fitted as standard with the 520REL LoadSure element pumphead which features a large swept volume with sprung stainless steel rollers for high accuracy. Low rotational speeds greatly increase tube life and system reliability. LoadSure elements fit into position for simple, error-free tube loading: optimum performance every time. Using the patented LoadSure D-connectors and easy-grip clutched rotor, the element can be changed in under one minute: simplicity itself, no special skills required.

The revolutionary 520REL LoadSure pumphead, taking Watson-Marlow benefits to thousands more industrial and sanitary applications.


Product Category
Liquid Handling Pumps
Pump Type
Dosing Pump; Injection Pump; Metering Pump; Peristaltic Pump; Positive Displacement Pump; Self-Priming Pump; Sanitary Pump
Discharge Pressure
30.0 psi (21.09 m of Water)
Liquid Flow
0.925 GPM (3.50 L/min)
Power Source
AC; 115 VAC, 230 VAC
Pump Housing Material
Industry Served