Burkert Type 2301 - Manual (Page 34)

34
Maintenance, cleaning
Installation tool
Tool insert
Valve seat
Fig. 20: Replacing the valve seat
Warning!
danger if incorrect lubricants used!
Unsuitable lubricant may contaminate the medium. In oxygen
applications there is a risk of an explosion!
▶ In specific applications, e.g. oxygen or analysis applications, use
appropriately authorised lubricants only.
→
Grease the thread of the valve seat with stainless steel lubricant
(e.g. with Klüber paste UH1 96-402 from Klüber).
→
Manually screw the fitted valve seat into the thread of the body.
→
Screw the valve seat in place using a torque wrench. Observe
the tightening torque (see “Tab. 12”).
tightening torques for valve seat installation
dn
tightening torque [nm]
Valve seat coated
4 – 15 20 ±3
20 28 ±3
25 40 ±5
32 65 ±5
40 85 ±8
50 120 ±8
65 150 +10
80 180 +10
100 220 +10
Tab. 12: Tightening torques for valve seat installation
english
Type 2301