10
IMPORTANT NOTE:
• Fully lined valves which are installed in zone 0 and 20 have to
be lined with conductive PFA material. A static eliminator device
has to be assembled in order to connect the plug with the body
(grounding).
• AZ valves can be operated manually (e.g. hand lever, gear box)
as well as mechanical or electrical (e.g. pneumatic, hydraulic or
electric actuator).
• For electrical and mechanical actuators and accessories an own
declaration of conformity according to code 2014/34/EU may
have to be considered.
• Whenever fully lined valves with non-conductive lining are in-
stalled in explosive areas, AZ-Armaturen GmbH strongly rec-
ommends the use of an anti-static band/earth cable in order to
ensure grounding of the plug.
6. Operation and functionality
Ball and plug valves
are installed in pipeline systems by
flanging, screwing or welding and are designed to conduct,
block or control media flow. On/off valves have the open and
closed position indicated by the lever position (lever longitu-
dinal to the valve = open, lever perpendicular to the valve =
closed) or by a position indicator on top of the gear box. Flow
directions of multiport valves are indicated by a notch on the
plug stem or by a position indicator assembled on top of the
plug or the gear box. Flow directions of actuated valves are
indicated by red markings on the coupling between valve and
actuator.
Jacketed valves
are used for particular media in order to
maintain the process capability or the flow.
