MAINTENANCE
Series 121
16/27
Edition 2015-11-16
600968EA
6.2
Tightening torque specifications
Item-No.
Description
Tightening torque [Nm]
DN 160–200
DN 250–320
2
Bonnet screw
14
20
Item-No.
Description
Tightening torque [Nm]
DN 63–100
2
Bonnet screw
3.5
Table 6-1
6.3
Required tools
•
Torque wrench according «Table 6-1»
•
Cleanroom wiper soaked with alcohol (2% methyl ethyl ketone)
•
O-Ring removal tool; see «Table 11-1» on page 27
Figure 6-1
6.4
Replacement of gate seal and bonnet seal
WARNING
Loaded spring steel sheet
Human body parts may get jammed and severely injured.
Do not put human body parts between valve gate and spring steel sheet.
NOTICE
Contamination
Product may get contaminated.
Always wear cleanroom gloves when handling the product.
