Pneumatic Data - Burkert 8681 Operating Instructions Manual

Control Head Type 8681
TechnicalData
6.5.

Pneumatic data

Control medium:
Dust content Quality class 7: max. particle size 40 µm,
Water content Quality class 3: max. pressure dew point -20 °C or min. 10 °C below
Oil content Quality class X: max. 25 mg/m
Temperature range
of compressed air:
Pressure range:
Air rate solenoid valve:
Connections:
The intake and exhaust air can be set separately for each solenoid valve using flow restriction screws, in order to
be able to affect the expansion and retraction rates of the process valve (see figure below).
Flow restriction
screw Exhaust air R
Flow restriction
screw Intake air P
Fig. 6: Flow restriction screws of the solenoid valves
When setting the retraction and extension rates of the pneumatic actuator, ensure that there is no con-
stant "primary pressure" during deaeration!
Keep in mind that the working conditions in the process valve area on the side of the product (flow types,
pressure variations) may result in changes in the set aeration and deaeration times.
Air, neutral gases
Quality classes in accordance with ISO 8573-1
(5 µm filter recommended)
max. particle density 10 mg/m
the lowest operating temperature
3
-10 ... +50 °C
2.5 ... 8 bar
110 I /min (for ventilation and deaeration, aeration)
N
(110 I /min
N
200 I /min
N
(Q value according to definition when pressure drops from 7 to 6 bar
Nn
absolute at +20 °C)
Intake and exhaust air connection
Working connections
3
- supplied state
- maximum typical flow rate)
G1/4
G1/8
Hand lever of the
mechanical manual
control:
Red lever:
left: 0
right: 1
English
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