Burkert 20014453, Быстрый старт, Страница: 12 / 22

12
Installation
Type 3281
Assembly tool
Tool insert (depending
on seat size)
Valve seat
Fig. 4: Mounting the valve seat
DANGER
Danger due to lubricant.
Lubricant may contaminate the medium. There is a risk of
explosion in oxygen applications.
▶
For specific applications, e.g. oxygen or analysis applications,
use approved lubricants only.
→ Apply lubricant to the valve seat thread (e.g. Klüberpaste UH1
96-402 from Klüber).
→
Screw the attached valve seat into the thread of the valve
body manually using the assembly tool.
→
Tighten the valve seat using a torque wrench. Observe the
tightening torques in the following table.
Tightening torques for valve seat assembly:
Valve seat size Tightening torques for coated seats [Nm]
4...1 0 20 ± 3
→
Screw the actuator to the valve body. The work steps
required are described in chapter “7.4.2”.
7.3 Installing valve body
→ Connect valve body to pipeline.
→ Devices with welded connection: Weld the valve body into
the pipeline. To do this, observe chapter on Installing devices
with welded connection.
7.4 Installing devices with welded
connection
NOTE
Damage to the actuator when welding the valve body into the
pipeline.
▶
Before welding into the pipeline, remove the actuator.
7.4.1 Removing actuator from the valve body
NOTE
Damage to the valve seat seal or seat contour.
▶
When removing the actuator, the valve must be in the open
position.
→
Connect the valve to the Bürkert Communicator and open the
valve 100 % in the MANUAL operating state.
english