Operating Manual
© Dürr Systems AG
EcoBell2 SL EC - Rotating Atomizer with External Charging
Faults
Document No.: MRA00001EN
Version:: 07
•
As of:: 01/2020
127 / 156
Fig. 80: Removing the main needle valve
9.5.2
Installing the main needle valve
Prior to the installation of the main needle valve check its condition.
- The main needle valve must be equipped with the required sealing
rings.
- The sealing rings must be lubricated with special grease.
- The main needle must be straight and undamaged.
- The thread of the main needle valve and the valve casing must be
completely clean.
- The thread of the main needle valve must be lubricated with
special grease.
- Main valve needle must only be installed in the valve casing when
the paint tube is mounted on the valve block. Otherwise there is a
risk that the main needle is bent during installation of the paint
tube.
Follow these steps:
• Carefully insert the main needle valve into the bore of the valve
block.
• The main needle valve must be manually screwed into the thread.
It must be possible to screw the main needle valve with minimal
effort. Do not damage the threads in the valve block.
• Tighten the main needle valve in the valve block with a socket
wrench to 4.5 Nm.
• Align the lid on the valve block. Pay attention to the position of the
pins.
• Insert screws in the holes.
• Tighten screws to 5.5 Nm.
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