Burkert Type 2031 - Handbuch (Seite 19)

2030/2031 - 19
english
Continuation 4.4.1 Installation
CAUTION!
Diaphragm and diaphragm contacting parts must be kept
grease-free by any means!
• Buttom diaphragm (Pos 21).
• Align diaphragm: Marker of the diaphragm must stand in vertical position
to the flow direction
• Put valve body back on (Pos. 22).
• Bring casing screws (Pos. 24) to home position.
• Activate the actuator 2 x.
• Fasten screws crosswise (Pos. 24).
CAUTION!
Observing torque (see table)!
• Examine valve on reliable operation and tightness.
Table: Thorque
DN
Torque for diaphragm
(approx. values) [Nm]
EPDM PTFE
8 2.5 2.5
15 3.5 4
20 4 4.5
25 5 6
32 6 8
40 8 10
50 12 15
65 15 20