Watson & Sons 520DUN user manual Flow rates, Pumping conditions, 520R and 520R2

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33 Flow rates

Pumping conditions

For precise and repeatable performance it is important to determine flow rates under operating conditions for each new piece of tubing.

When rotating counter-clockwise, 520R, 520R2 and 520RE pumpheads’ flow rates are directly proportional to rotor speed. When rotating clock- wise, 520R, 520R2 and 520RE pumpheads’ flow rates are directly propor- tional to rotor speed up to 1.5 bar; their performance above 1.5 bar should be determined empirically.

Note: 520RE pumpheads should be used rotating counter-clockwise if pres- sures above 1.5 bar are required.

If you wish to run the pump at a speed not shown in the tables below, flow figures can be reached by dividing the maximum flow shown in the tables below by the maximum rpm figure, and multiplying the result by your required speed in rpm.

Actual flow rates achieved may vary because of changes in temperature, viscosity, inlet and discharge pressures, system configuration and tubing performance against time. Flow rates may also vary due to normal manufacturing tolerances of the tub- ing. These tolerances will make flow rate variance more pronounced at smaller bore sizes.

520R and 520R2

All performance figures for the 520R and 520R2 pumpheads have been recorded against peak pipeline pressures.

Although rated to 2bar (30psi) peak pressure, this pump will generate in excess of 2bar (30psi) peak pressure if the pipeline is restricted. Where it is important that 2bar (30psi) is not exceeded, pressure relief valves should be installed in the pipeline.

Viscosity handling is maximised by using 2.4mm wall tubing with the 520R2 pumphead.

Flow rates are normalised test values obtained using 225mm (8 7⁄8) of new tubing (measured from the inside faces of the tube clamps), and the pumphead rotating clockwise pumping water at 20C with negligible inlet and discharge pressures.

Note: Flow rates quoted are for 1.6mm and 2.4mm wall tubes. Tubes of 0.5mm and 0.8mm bore are only available in 1.6mm wall thickness except for platinum-cured silicone. Tubes of 9.6mm bore are only available in 2.4mm wall thickness.

Watson-Marlow 520DuN IP66/NEMA 4X User Manual

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Contents Contents Watson-Marlow 520DuN IP66/NEMA 4X pumpsPublication history 104 Decontamination certificate 105 Declaration of conformity Declaration of incorporationFive year warranty Cased pumps, 620 cased pumps and 720 cased pumpsConditions ExceptionsWhen you unpack your pump Packaging disposalInspection Components supplied 520DuN pump, IP66 Nema 4X modelsInformation for returning pumps StorageSuitable applications Peristaltic pumps an overviewHow they work Safety notes Page Pump specifications Remote control 520DuN, IP66 Nema 4X modelManual control Analogue controlIP Ingress Protection and Nema definitions NemaPump specifications Standards HarmonisedStandards OtherDimensions 520DuN IP66/NEMA 4X model Unit weightsDo’s and do not’s Good pump installation practiceGeneral recommendations Page Connecting this product to a power supply Page Page Switching the pump on for the first time Start-up check listFirst-time start-up defaults Language Analogue inputSpeed User trimPump is now ready to operate Keypad functions in manual mode Manual operationPage Page Manual operation and remote digital inputs and outputs Keypad lockKeypad beep Main menu Keypad functions in menu screensMain menu entry PIN-secure process protection Calibrate Head and tube TubeCalibration dose Page Setup Setup menuTrim Analogue Input 1 speed Program Trim Scaling strokeDisplay AlternativelyPump number BaudStop bits 18.7 Xon/XoffFlow units Run time General alarm OutputsParameters are Run / stopPage Remote stop Page Auto-restart Set maximum speed Backlight18.15 ROM LanguageDefaults BeepSecurity code Pin out details ExitMemoDose To dispense a master doseChanging dosing speed To repeat the doseExit To remove the 520N watertight module Automatic control wiring22.1 520N module removal and replacement To replace the 520N watertight module Wiring up Page Do not strap the control and mains power cables together Speed analogue input Scaling analogue input Speed analogue output Tachometer frequency outputDirection input SwitchRun / stop input Tube monitor 520N module Wire colour Auto / manual toggle inputMemoDose input Leak detection inputImportant pump status outputs Outputs 1, 2, 3Supply voltages 22.14 RS485 input DC Voltage Max load Typical useHow to get into auto operation Automatic control and operationHow to get out of auto operation Emergency stop How to get into network operation Network control and operationHow to get out of network operation 24.1 RS485 command strings Command Parameters MeaningTroubleshooting Error codes Error condition Suggested actionDrive maintenance Drive spares520REL/520REM/520REH 520R, 520R2 and 520RE pumpheadsIdentification of parts Pumphead position, removal and replacement To reposition the trackRotor replacement Rotor removal29 520R, 520R2 and 520RE installation Opening the pumphead guard29.2 520R and 520R2 tube loading 29.3 520RE fitting the drain port 29.4 520RE Element loading 520REL Pressures Up to 2 bar 30 psiPressures Up to 4 bar 60 psi Up to 7 bar 100 psi 2mm and 6.4mm Industrial SanitaryPage 29.5 520RE Element connection Sanitary 3⁄4in mini-Tri-clamp connectorsIndustrial quick-release connectors 30 520R, 520R2 and 520RE maintenance Chemical Cleaning precautions 31 520R, 520R2 and 520RE rotor settingsGeneral guide to cleaning with solvents Pumphead spares 520R/520R2 520REL/520REM/520REH520R and 520R2 Flow ratesPumping conditions 520RE Continuous tubing 220rpmElements Performance curves Page Page Page Tubing and element part numbers 6mm wall tubing for 520R pumpheads4mm wall tubing for 520R2 pumpheads Inch Marprene Bioprene Pumpsil913.A008.024 Inch Chem-Sure Sta-Pure102 4mm wall elements for 520RE pumpheadsSanitary Inch Bioprene TM Sta-Pure 103 35 520 series pumping accessoriesAccessory Description Part code Pump Compatibility 104 TrademarksPublication history 105 Decontamination certificateRGA number Signature Your position Date

520DUN specifications

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Safety is also paramount in the design of the 520DUN. It features reinforced safety measures, including roll-over protection systems and visibility enhancements, ensuring operator safety during operations.

In summary, the Watson & Sons 520DUN represents the pinnacle of agricultural machinery with its powerful engine, remarkable load capacity, precision technology, and ergonomic design. It is tailored for those who seek reliability and efficiency in their agricultural endeavors, making it a noteworthy choice in today's competitive market.
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