Liquid Handling Pumps from Watson Marlow Pumps Group

520REL NEMA 2 (IP31) Low-Pressure Pump -- Model 520U/REL

520REL NEMA 2 (IP31) Low-Pressure Pump -- Model 520U/REL -- View Larger Image
520REL NEMA 2 (IP31) Low-Pressure Pump -- Model 520U/REL-Image
  • Flow rates up to 55.5 gph at 30psi peak pressure with 520 LoadSure elements
  • 520REL pumphead features large swept volume with sprung rollers for high accuracy, gentle pumping of shear-sensitive fluids
  • Require less than one minute to change
  • 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 flow rate calibration
  • MemoDose for accurate single shot dispensing
  • Value for life:the lowest cost of ownership
  • Stackable - up to three pumps can be stacked
  • Inputs: Analog 0-10V / 4-20mA software configurable and calibrated
  • Inputs: 4 pump status inputs all accepting 5V TTL or 24V industrial logic
  • Outputs: 4 status outputs, 5V TTL or 24V industrial logic, user configured
  • Outputs: 0-10V analog or 0-1258Hz speed indication output
  • 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 NEW 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
0.942 GPM (3.57 L/min)
Power Source
AC; 115 VAC, 230 VAC

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Pump Housing Material
Industry Served