Burkert Type 8696 - Manual (Page 14)

14
Fluidinstallation
8.2. Installing the process valve
Thread type and dimensions can be found in the corresponding data
sheet.
→
Connect the valve according to the operating instructions for the
valve.
8.3. Pneumatic connection of the
positioner
DANGER!
Risk of injury from high pressure!
• Before dismounting pneumatic lines and valves, turn off the
pressure and vent the lines.
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. 7: 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. This ensures that the control behavior is
not extremely negatively affected in the upper stroke range on
account of too little pressure difference.
During operation keep the fluctuations of the pressure supply
as low as possible (max. ±10 %). If fluctuations are greater,
the control parameters measured with the
X.TUNE function
are not optimum.
english
Type 8696