Burkert Type 2031 - Handbuch (Seite 15)

2030/2031 - 15
english
5.2 replace seal kit in Control function B and i (CfB and Cfi)
5.2.1 installation
Required parts: 1 piston seal (Pos. 10)
1 lip seal (Pos. 2)
2 o-rings (Pos. 8, 19)
notiCe! The valve must be completely dismounted when replacing
all seals.
Work steps:
• Screw transparent cap (Pos. 20) with
o-ring (Pos. 19) out of cover (Pos. 18).
• Dismount position indicator (Pos. 15)
with Allen key.
• Remove valve body (Pos. 22) from the
actuator by unfastening the four screws
(Pos. 24).
• Hold actuator on square of the actuator
body (Pos. 1).
• Dismount cover (Pos. 18) with special
key.
• actuator size G-100/h-125 mm:
Remove disc (Pos. 29).
• Remove nut (Pos. 14), while holding
against spindle (Pos.4) with Allen key.
WarninG!
Pressure spring is pre-
stressed for control func-
tion B (CFB).
• Carefully remove piston (Pos. 9) and
upper support disc (Pos. 7).
Caution!
Do not damage the sealing surfaces of the actuator ring!
• Remove lower intermediate disc (Pos. 7) and o-ring (Pos. 8).
• Remove spring (Pos. 6).
• Push out spindle (Pos. 4) with pressure piece (Pos. 5) and diaphragm
(Pos. 21) through the bottom.