Burkert 2000 Mode D'emploi page 2

ReplacemenT InsTRucTIons
The replacement instructions describe the procedure for converting
the control function of process valves of Type 2000 (angle seat valve)
and Types 2002 and 2012 (globe valves).
These instructions contain important safety information.
Failure to observe these instructions may result in hazardous
situations.
• The instructions must be read and understood before the
conversion.
symbols
→
designates a procedure which you must carry out.
Warning of serious or fatal injuries:
Danger!
In case of imminent danger.
Warning!
In case of potential danger.
Warning of minor or moderately severe injuries:
Caution!
eXploDeD-vIew DRawIng
Actuators control function A (closed in rest position by spring force)
CFA
only for version
ANTG G, H
32
40
12
conveRsIon fRom conTRol funcTIon
a (cfa) To conTRol funcTIon b (cfb)
Danger!
Danger – high pressure!
• Turn off the pressure and vent the lines before loosening lines or
valves.
Risk of injury from improper maintenance!
• Maintenance may be performed by authorized technicians only!
• To screw on or unscrew valve body or actuator, use an open-end
wrench, never a pipe wrench, and observe tightening torques.
Required parts:
Item
35
30
5
Procedure:
→
1
Mount valve on the body.
31
2
26
4
29
3
28
5
25
1
24
21
Body Type
22
2000 and 2002
23
20
19
Body Type
2012
Description
1 Pressure spring
1 O-ring
1 Graphite seal
DescRIpTIon of The funcTIons
A
CFA Closed in rest position by spring force
P
A
Opened in rest position by spring force
CFB
P
A
Actuating function via reciprocal
CFI
pressurization
P
Flow above the seat
The valve is closed by spring force (CFA) with the medium flow.
Medium pressure above the swivel plate supports the closing process
and contributes to sealing the valve seat. The valve is opened by the
control pressure.
Flow below the seat
Depending on the model, the valve is closed against the medium flow
by spring force (CFA) or by control pressure (CFB). Medium pressure
under the swivel plate contributes to opening the valve.
Actuators control function B (opened in rest position
by spring force) and I (dual acting)
CFB
30
35
34
Caution!
Danger through taut springs!
• Carefully open piston actuator!
→
31
Release cover with special wrench until the springs are com-
pletely relaxed, holding up the actuator body
For information about the special wrench, see Chapter
"Installation tools".
→
For actuator size G (100 mm) and H (125 mm): Remove
40
washer .
→
28 29
Remove pressure springs
→
26
Remove position indicator
→
Screw actuator on the nipple
→
Carefully screw in actuator on the swivel plate
on the upper section of the swivel plate).
→
25
Release nuts .
→
22
Remove pistons with supporting washer
→
19
Remove filler piece with intermediate washer
→
For actuator size G (100 mm) or H (125 mm) and identification
"R" on the type label: Insert spring seat
only for version
CFI ANTG E, F
12
17
18
11
7
6
only for version
ANTG D
11
10
8
6
12
against the hexagon.
.
with Allen key.
6 1
out of the valve body .
3
(only put pressure
24
.
20 21
and O-ring
34
.
.