Burkert Type 2031 - Handbuch (Seite 10)

10 - 2030/2031
english
4.2 replace diaphragm in Control function B and i (CfB and Cfi)
4.2.1 installation
Required parts: 1 diaphragm (Pos. 21)
Diaphragm fixation types:
epDM- or fkM-diaphragm
- DN 8, 15, 20, buttoned diaphragm
- DN 25 - 65, screwed-in diaphragm
ptfe-diaphragm
- DN 8, buttoned diaphragm
- DN 15 - 65, bayonet fixation
Work steps:
• Unfasten the 4 enclosure screws (Pos. 24).
• Remove valve body (Pos. 22) and screws
(Pos. 24).
• Replace old / defective diaphragm
(Pos. 21).
Caution!
Diaphragm and all diaphragm contacting parts must be kept
grease-free by any means!
• Align diaphragm:
Mark tab of diaphragm must be in 90° position to the flow direction.
• Put valve body (Pos. 22) back on.
• Tighten screws (Pos. 24) crosswise.
Caution!
Observe torque!
• Examine valve for reliable operation and tightness.