Burkert Type 2031 - Handbuch (Seite 12)

12 - 2030/2031
english
5 replaCe seal kit
5.1 replace seal kit in Control funktion a (Cfa)
5.1.1 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).
• 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 springs (Pos. 11, 12).
• Remove position indicator (Pos. 15) with
Allen key.
• Remove nut (Pos. 14), while holding
against spindle (Pos.4) with Allen key.
• Push spindle (Pos. 4) with pressure piece
(Pos. 5) and diaphragm (Pos. 21) down-
wards and remove module.
• Carefully push out piston (Pos. 9) with up-
per support disc (Pos. 7 or 13) through the
top, thus not injuring seal surfaces of the
actuator body (Pos. 1).
• Remove lower intermediate disc (Pos. 7) and o-ring (Pos. 8) from piston.
• Remove piston seal (Pos. 10) from piston (Pos. 9).
• actuator size h-125: Carefully push out safety disc over lip seal (Pos. 2 ).
• Carefully remove the lip seal (Pos. 2) from the actuator body (Pos. 1).