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Watson-Marlow 620DuN and 620Du User Manual 108
34 620L and 620LG performance data
Sta-Pure and Marprene TM tubing are hard to compress when new. When using
tubing made of these materials, the first five pumphead revolutions should be at a
speed of 10rpm or greater. If the pump is run slower, the safety system built into
pump drive’s software may cause it to stop and display an over-current error
message.
34.1 620L and 620LG flow rates
Note: Rates apply to Y elements and two channels of continuous tubing combined.
620L flow rates (2 bar pressure capacity)
620LG flow rates (4 bar pressure capacity)
620L, Neoprene, l/min
Speed Tube bore (4.0mm wall)
rpm 8.0mm 12.0mm 16.0mm
0.1 0.002 0.003 0.005
265 4.6 7.7 13.3
620L, Neoprene, USGPM
Speed Tube bore (4.0mm wall)
rpm 8.0mm 12.0mm 16.0mm
0.1 0.0005 0.0008 0.0013
265 1.20 2.03 3.50
620L, Marprene, Bioprene, l/min
Speed Tube bore (4.0mm wall)
rpm 8.0mm 12.0mm 16.0mm
0.1 0.002 0.003 0.004
265 4.5 8.0 11.3
620L, Marprene, Bioprene, USGPM
Speed Tube bore (4.0mm wall)
rpm 8.0mm 12.0mm 16.0mm
0.1 0.0004 0.0008 0.0011
265 1.18 2.12 2.98
620L, Pumpsil silicone, l/min
Speed Tube bore (4.0mm wall)
rpm 8.0mm 12.0mm 16.0mm
0.1 0.002 0.003 0.004
265 4.4 8.5 11.5
620L, Pumpsil silicone, USGPM
Speed Tube bore (4.0mm wall)
rpm 8.0mm 12.0mm 16.0mm
0.1 0.0004 0.0008 0.0011
265 1.17 2.25 3.05
620L, Sta-Pure, ChemSure, l/min
Speed Tube bore (4.0mm wall)
rpm 8.0mm 12.0mm 16.0mm
0.1 0.002 0.003 0.005
165 3.1 5.7 7.8
265 5.2 9.0 12.4
620L, Sta-Pure, ChemSure, USGPM
Speed Tube bore (4.0mm wall)
rpm 8.0mm 12.0mm 16.0mm
0.1 0.0005 0.0009 0.0012
165 0.81 1.52 2.05
265 1.39 2.38 3.28