Burkert 8691 Manuel D'utilisation page 44

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Check that the seal is correctly positioned in the body casing.
noTe!
Breakage of the pneumatic connection pieces due to rotational impact.
▶ When unscrewing and screwing in the body casing, do not hold the actuator of the process valve but the
connection housing.
Damage or malfunction due to penetration of dirt and humidity.
To ensure degree of protection IP65 / IP67:
▶ Screw the body casing in all the way.
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Close the device (assembly tool: 674077
Figure 39: Position of the seal in the body casing
The assembly tool (674077) is available from your Bürkert sales office.
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english
Body casing
Seal
body casing
Connection housing
Type 8691
AS-Interfaceinstallation