Burkert 8681 - Pneumatic Data

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Technical Data
6.6 Pneumatic data
Control medium: Air, neutral gases
Quality classes in accordance with ISO 8573-1
(5µmlterrecommended)
Dust content   Qualityclass7: max.particlesize40μm,
max. particle density 10 mg/m3
Water content Quality class 3: max. pressure dew point -20 °C or min. 10 °C below
the lowest operating temperature
Oil content   QualityclassX: max.25mg/m3
Temperature range
of compressed air: -10 ... +50 °C
Pressure range: 2.5 ... 8 bar
Air rate solenoid valve:   QNn=110IN/min(forventilationanddeaeration,aeration)
(110IN/min  -suppliedstate
200IN/min  -maximumtypicalowrate)
(QNnvalueaccordingtodenitionwhenpressuredropsfrom7to6bar
absoluteat+20°C)
Connections:     Intakeandexhaustairconnection(1/P,3/R): G1/4
Workingconnections(2/A1...3):  G1/8
Setting the intake and exhaust air at the solenoid valve using ow restriction screws
Theintakeandexhaustaircanbesetseparatelyforeachsolenoidvalveusingowrestrictionscrews,in
ordertobeabletoaecttheexpansionandretractionratesoftheprocessvalve(seegurebelow).
For details see „9.3Flowrestrictionfunctionofthesolenoidvalves“onpage38.
Flow restriction screw
Exhaust air R
Flow restriction screw
Intake air P
Red hand lever of the
mechanical manual
override:
Hand lever position:
left: 0
right: 1
Fig. 6: Flow restriction screws and mechanical manual override of the solenoid valves
english
Control Head Type 8681