Burkert 2301 Element Manuel D'instructions page 5

→
Support control cone on the cylindrical part with the aid of a prism or
something similar.
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Put on dowel pin and carefully knock in with a hammer.
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Position the dowel pin in the center of the spindle axis.
For mounting actuator on valve body see Chapter "3.4", page 9.
3.2.1 Replacing valve seat
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Remove actuator (see Chapter
"3.1")
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Select a suitable tool insert and
screw it into the installation tool.
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Unscrew the old valve seat using the
installation tool and a wrench.
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Clean the thread of the body and the
sealing surface with compressed air.
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Place the new valve seat on the installation tool.
The installation tool is available from your Bürkert sales office (see
Chapter "4").
WARNING!
Unsuitable lubricant may contaminate the medium.
In oxygen applications there is a risk of explosion.
▶ Only use approved lubricants for specific applications, such as oxygen or
analytical applications.
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Grease the valve seat thread with stainless steel lubricant
(e.g. with Klüber paste UH1 96-402 from Klüber).
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Manually screw the fitted valve seat into the body thread.
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Screw valve seat tight using torque wrench. Observe tightening torque (see
Installation
"Tab. 2").
tool
DN
4-15
20
Tool insert
25
Valve seat
32
40
Tab. 2: Tightening torques for valve seat installation (valve seat coated)
For mounting actuator on valve body see Chapter "3.4", page 9.
Torque [Nm] DN
20 ± 3 50
28 ± 3 65
40 ± 5 80
65 ± 5 100
85 ± 8
english
Torque [Nm]
120 ± 8
150 +10
180 +10
220 +10
5