Burkert Type 8695 - Manual (Page 14)

14
Pneumaticinstallation
control function a (cfa)
Process valve closed in rest position (by spring force)
Control head
Pilot air outlet 2
2
2
1
or
2
2
2
1
Actuator
Upper pilot air port
Lower pilot air port
control function B (cfB)
Process valve open in rest position (by spring force)
Control head
Pilot air outlet 2
2
2
1
or
2
2
2
1
Actuator
Upper pilot air port
Lower pilot air port
control function i (cfi)
Process valve in rest position
closed open
Control head
Pilot air outlet 2
2
2
1
2
2
2
1
Actuator
Upper pilot air port
Lower pilot air port
Tab. 1: Pneumatic connection to actuator
8 pneumaTic insTallaTion
Danger!
risk of injury from high pressure in the equipment/device.
▶ Before working on equipment or device, switch off the pressure
and deaerate/drain lines.
Warning!
risk of injury from improper installation.
▶ Installation may be carried out by authorized technicians only
and with the appropriate tools.
risk of injury from unintentional activation of the system and
an uncontrolled restart.
▶ Secure system from unintentional activation.
▶ Following installation, ensure a controlled restart.
procedure:
→
Connect the control medium to the pilot air port (1)
(3 – 7 bar; instrument air, free of oil, water and dust).
→
Attach the exhaust airline or a silencer to the exhaust air port (3)
(see “Fig. 8: Pneumatic connection”).
Keep the adjacent supply pressure always at least 0.5 –
1 bar above the pressure which is required to move the
actuator to its end position.
english
Type 8695