Danfoss VLT AQUA FC 202 Design Guide

100% speed
Flow
Flow
Pump curve
Head or pressure Head or pressure
Natural
operating point
Operating
point
Throttled
Unthrottled
Throttled system
Unthrottled system
60
65
70
75
78
80
80
78
75
3
1
1
2
2
3
Hs
Hp
e30bd890.10
Illustration 8: Flow Reduction by Valve Control (Throttling)
1
Operating point using a throttle valve
2
Natural operating point
3
Operating point using speed control
Speed control
The same ow can be adjusted by reducing the speed of the pump as shown in
Illustration 9. Reducing the speed moved the pump
curve down. The point of operation is the new intersection point of the pump curve and the system curve (3). The energy savings
can be calculated by applying the anity laws as described in 4.3.1 Example of Energy Savings.
Flow
Head or Pressure
Pump curve
Operating
point
Natural
Operating point
system
Unthrottled
Speed
reduction
1
2
3
Hp
Hs
e30bd894.10
Illustration 9: Flow Reduction by Speed Control
AJ300847815559en-000101 / 130R033724 | Danfoss A/S © 2020.09
Product Family Overview
VLT® AQUA Drive FC 202
Design Guide

Danfoss VLT AQUA FC 202 Specifications

General

Brand	Danfoss
Model	VLT AQUA FC 202
Category	DC Drives
Language	English