Agromatic ESR-NK Series, Инструкция по установке и эксплуатации, Страница: 23 / 98

3 Product description 3.3 Functional description
Actuators NK and VK, Position Controller ESR-NK 17
3.3 Functional description
The actuator has been designed to operate industrial valves (e.g. dampers,
ball valves, other valves) within the positioning range determined by the me-
chanical characteristics of the valve. Depending on the design of the actua-
tor, it is possible to move only to the valve end positions or to any position be-
tween the end positions.
The actuator series NK can be installed in any orientation.
The actuator series VK may be installed only in one of the permitted installa-
tion positions (see Fig. 5.3
“Series VK – installation positions” ).
The actuator is installed either using a bracket or an adapter but can also be
attached directly to the valve if required. If a bracket is used, the actuator is
mounted to the valve by means of a coupling.
Different brackets are available for various requirements.
In case of a power failure the actuator can be operated manually by a hand-
wheel (option).
3.4 Technical data
3.4.1 Dimensions
For details on the dimensions of the relevant series, see section
“5.2 Installation” .
3.4.2 Weight
Depending on the customer-specific actuator model, however max.:
NK 3.5kg
VK 6.0kg
3.4.3 Housing
Protection class acc. to DIN EN 60529
−
IP65 (actuator)
−
IP54 (stroke unit)