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Description of the valves
Type 8650 REV.2
13
dEscRipTiOn Of ThE ValVEs
pilot control
The valves used in the AirLINE Ex system largely consist of 2 components:
•
Component 1: the pilot control with degree of protection Ex-i.
The pilot control converts the received electrical energy into a pneumatic switch signal.
The pilot controls are components with Ex approvals.
The electronic modules from AirLINE Ex are designed to operate with these pilot controls.
•
Component 2: the strengthener
The strengthener is a purely pneumatic element that raises the relatively low flow rate of the pilot control
to the level required for the application.
Because only the pilot control is important from an electrical perspective, some information specially refers
to this (e.g., boost time or approval-related information).
Valves of the variant “auxiliary pilot air”
Valves of the variant “auxiliary pilot air” make it possible to switch to <2.5 bar pressure on the work ports.
For reliable operation you require the “auxiliary pilot air” with a pressure of >2.5 bar. This is fed to the con-
nection segments of the valve block via the connection “X”.
The pilot valve exhaust air escapes into the surrounding area when using “auxiliary pilot air” valves.
“Auxiliary pilot air” valves cannot be combined with standard valves on the valve block (internal auxiliary
pilot air), as the connection X of the valve block is used differently.
The option “P shutoff” of the pneumatic base modules cannot be used in combination with “auxiliary pilot
air” valves.
“Auxiliary pilot air” valves can essentially be used in combination with the on/off valve. However, the
on/off valve only serves to vent the strengtheners, while the pilot valves must be pressurised, as the
auxiliary pilot air is not deactivated by the on/off valve.
Further information on the valves can be found under the respective type number at
English
