29
Performance data
29.1
620RE, 620RE4 and 620R performance data
Pumping conditions
All performance figures in this operating instruction have been recorded against peak pipeline
pressures.
This pump is rated to 4 bar (58 psi) peak pressure when fitted with a 620RE, 620RE4 or 620LG pumphead
using high-pressure tubing. However, it will generate in excess of 4 bar (58 psi) peak pressure if the
pipeline is restricted. Where it is important that 4 bar (58 psi) is not exceeded, pressure relief valves
should be installed in the pipeline.
Viscosity handling is maximised by using 4.0 mm wall LoadSure elements with the 620RE and 620RE4
pumpheads.
Flow rates are normalised test values obtained using new tubing with the pumphead rotating clockwise
pumping water at 20 °C with negligible inlet and discharge pressures. 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 tubing. These tolerances will make flow rate variance more pronounced at smaller bore
sizes.
For precise and repeatable performance it is important to determine flow rates under operating
conditions for each new piece of tubing. 620R and 620L family pumpheads' flow rates are directly
proportional to rotor speed. 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.
In normal circumstances, rotor and tube life are maximised if the pumphead is run slowly, particularly
when pumping at high pressure. However, to maintain performance at pressures above 2 bar, avoid
running the pumphead below 50 rpm. If low-flow, high-pressure operation is necessary, switching to a
smaller tube is recommended.
STA-PURE Series PCS, STA-PURE Series PFL 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
10 rpm 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.
Note
: Flow rates quoted have been rounded for simplicity, but are accurate to within 5 % - well within
the normal tubing tolerance variation of flow rate. They should therefore be taken as a guide. Real flow
rates in any application must be determined empirically.
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