Samson 3251 - Page 68

9-6 EB 8052 EN
Servicing
External leakage:
Plug stem
guide
2)
(packing)
External leakage:
Body gaskets
1)
at bellows seal/insulating
section/intermediate piece
External leakage:
Metal bellows
2)
Test connection
to monitor
bellows for
leakage
External leakage:
At pipeline
joint
1)
External leakage:
Body
gaskets
1)
Seat leakage:
• Seat/body
• Plug/seat
1)
Static sealing
2)
Dynamic sealing
Fig.9-1: Possible points of leakage on the control valve: version with standard bonnet (left) and
version with bellows seal (right), which also applies to versions with insulating section or
intermediate piece