Pneumatic Connection - bürkert 8693 Schnellstartanleitung

Control function Pneumatic connection Type 8692, 8693
with actuator
Pilot air
outlet
Types 8692
and 8693
Process valve
2
1
closed in rest
A position
(by spring
2
2
force)
Process valve
2
1
open in rest
B position
(by spring
2
2
force)
2
Process valve
1
closed in rest
position
2
2
I
2
Process valve
1
open in rest
position
2
2
Tab. 2: Pneumatic connection to actuator
20
Pilot air port actuator
lower pilot air port of the
actuator
should be connected to
the upper pilot air port of
the actuator
upper pilot air port of the
actuator
should be connected to
the lower pilot air port of
the actuator
lower pilot air port of the
actuator
upper pilot air port of the
actuator
upper pilot air port of the
actuator
lower pilot air port of the
actuator
English
Type 8692, 8693
Installation
10.5 Pneumatic connection
DANGER!
Risk of injury from high pressure in the system/device.
▶ Before working on the system or device, switch off the pressure
and vent/drain lines.
Observe the following for the proper functioning of the
device:
▶ The installation must not cause back pressure to build up.
▶ To make the connection, select a hose with sufficient
cross section.
▶ Design the exhaust air line in such a way that no water or
other liquid can get into the device through the exhaust
air port (3 or 3.1).
Exhaust air concept:
▶ In compliance with the degree of protection IP67, an
exhaust air line must be installed in the dry area.
▶ Always maintain an applied control pressure of at least
0.5 ... 1 bar above the pressure which is required to
move the pneumatic actuator to its end position.
This ensures that the control behavior is not negatively
affected in the upper stroke range on account of too little
pressure difference.
▶ During operation, keep the fluctuations of the control
pressure as low as possible (max. ±10 %).
If fluctuations are greater, the control parameters mea-
sured with the X.TUNE function are not optimum.