Product Guide

Performance curves
SQFlex
5
25
5. Performance curves
Curve conditions
Performance range, SQFlex Solar
The SQFlex Solar performance range shown on page
page 7 is based on
• solar radiation on a tilted surface (tilt angle of 20°)
•H
T
= 6 kWh/m
2
per day
• ambient temperature: +85 °F (+29 °C)
• 20° northern latitude.
Performance range, SQFlex Wind
The SQFlex Wind performance range shown on
page 7 is based on
• average wind speed, measured over one month
• calculations according to Weibull's factor k = 2
• continuous operation over 24 hours.
Specific performance charts
The specific performance charts in the Performance
Curves section of this booklet are based on the
following guidelines:
• All curves show mean values.
• The curves must not be used as guarantee curves.
• Typical deviation: ±15 %.
• The measurements have been made at a water
temperature of +68 °F (+20 °C).
• The curves apply to a kinematic viscosity of
1 mm
2
/s (1 cSt). If the pump is used for liquids with
a viscosity higher than that of water, this will reduce
the head and increase the power consumption.
Pressure loss
The QH curves are inclusive of inlet and valve losses
at actual speed.