GEA ECOVENT N ECO Series, Operating Instructions Manual

Page: 22 / 106

3.1.2 Functional description
3.1.2.1 Spring-to-close actuator function (NC)
Z.1
Z.2
1
Figure 3-2 - Valve Type N_/ECO closed in idle
position (NC)
The actuator is of the spring-closing type
(NC). The valve is closed in the non-actu-
ated position.
Identification:
●
Shoulder of the valve disk is at the
bottom in the lantern (Z.2).
●
Air connection/ locking screw below
(Z.1).
Identification on the T.VIS control top
once the installation (SET-UP) has been
completed:
●
Permanent light (1) green: valve in
non-actuated position
●
Permanent light (1) yellow: valve in
end position (actuated position)
3.1.2.2 Spring-To-Open actuator function (NO)
A.1
A.2
1
Figure 3-3 - Valve Type N_/ECO open in idle
position (NO)
The actuator is spring-to-open (NO). The
valve is open in the non-actuated posi-
tion.
Identification:
●
Shoulder of the valve disk is at the
top in the lantern (A.2).
●
Air connection/ locking screw top
(A.1).
Identification on the T.VIS control top
once the installation (SET-UP) has been
completed:
●
Permanent light (1) green: valve in
non-actuated position
●
Permanent light (1) yellow: valve in
end position (actuated position)
3.1.2.3 Modifying the actuator closing direction
INFO
When the idle position is reversed by turning the actuator, the actuation
forces may no longer be sufficient for the application. Therefore, check the
actuator size before changing the closing direction.
22 / 106 - 3.1 Set-up and function
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