Type 3280

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6.

Performance specifications

6.1. Duty cycle derating diagram

Note:

• The duty cycle is an important factor for motor valves. The self-heating of the engine limits the maximum duty cycle. High ambient

temperatures additionally increase the risk of damage due to overheating. The following diagram shows the recommended maximum

duty cycle as a function of the ambient temperature. In energy-saving mode (lower driving force), higher duty cycles are possible. The

motor is optimised for the valve function in terms of size, power consumption and costs.

• The duty cycle does not mean the duty cycle of the device but the duty cycle of the motor. This is only switched on when the valve is to

move. Frequent set-point value changes drastically increase the duty cycle of the motor.

• Operating the valve outside the recommended duty cycle limits will result in a significantly reduced service life of the valve.

10

20

30

40

50

60

70

80

90

100

max. ambient temperature [°C ]

Normal mode

Power saving mode

Type 3280

Seat

DN1…6 < 6 bar standard

5 10 15 20 25 30 35 40 45 50 55 60 65

10

20

30

40

50

60

70

80

90

100

max. ambient temperature [°C ]

Normal mode

Power saving mode

Type 3280

DN1…6 < 6 bar positioner and process controller

DN8…10 < 6 bar standard

DN1…10 > 6 bar standard

Seat

5 10 15 20 25 30 35 40 45 50 55 60 65

Derating curve for positioner and process controller DN 8…DN 10: see operating instructions Type 3280 .