GEA VARIVENT X R Series, Руководство по эксплуатации

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3.1.2 Functional description
3.1.2.1 Spring-to-close actuator function (NC)
Figure 3-2 - Valve type X_R closed in idle position
(NC)
The actuator is of the spring-closing type
(NC). The valve is closed in the idle posi-
tion.
Identification on the spring-to-close up-
per valve seat:
●
Ring groove (11) on the wrench flat
surface of the valve disk rod
Identification on the T.VIS control top
once the installation (SET-UP) has been
completed:
●
Permanent light (1) green: valve in
idle position
●
Permanent light (1) yellow: valve in
end position (actuated position)
3.1 Set-up and function - 23 / 104