beautypg.com

Burkert Type 3239 User Manual

Page 21

background image

21

Repairs

replacement of the diaphragm
Procedure:

Clamp valve body in a holding device (applies only to valves not
yet installed).

Cross-loosen fastening screws and remove actuator with dia-
phragm from the body.

Detach or unscrew old diaphragm. If attachment is with a
bayonet catch, loosen the diaphragm by turning it 90° (see table
„Tab. 10: Fastening types for diaphragm“).

Turn handwheel all the way clockwise (CLOSED position).

Install new diaphragm in the actuator (see „Tab. 10: Fastening
types for diaphragm“).

Turn handwheel all the way counter-clockwise (OPEN position).

Align diaphragm.
note marker for direction of flow!

Place actuator back on the body.

Lightly cross-tighten the fastening screws until the diaphragm is
between the body and actuator.
do not tighten screws yet.

Activate the diaphragm valve once to position the diaphragm
correctly.

Tighten the fastening screws with the valve in the open position up
to the permitted tightening torque (see tables in chapter „10.2.1
Tightening torques for diaphragms“
).

Check the tightening torque of the screws again.

10.2.1 Tightening torques for diaphragms

Orifice

(diaphragm size)

dn [mm]

actuator pps or stainless steel

diaphragm

epdm / fkm

diaphragm

ptfe/advanced

ptfe/laminated

advanced ptfe

8

2

2,5

15

3,5

4

20

4

4,5

25

5

6

32

6

8

40

8

10

50

12

15

Tab. 11: Tightening torques for diaphragms, actuator PPS or

stainless steel

Orifice

(diaphragm size)

dn [mm]

actuator stainless steel

diaphragm

epdm / fkm

diaphragm

ptfe/advanced

ptfe/laminated

advanced ptfe

65

20

30

80

30

40

100

40

50

Tab. 12: Tightening torques for diaphragms, actuator stainless steel

english

Type 3232, 3233, 3233 K, 3234,

3235, 3239

This manual is related to the following products: