Burkert Type 2002 - Manual (Page 3)

ReplaCING THe ValVe SeT
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.
→
Mount valve 1 on the body.
CAutIon!
Danger through taut springs!
• Carefully open piston actuator!
→
Only for control function A (CFA): Release cover 31 with special
wrench until the springs are completely relaxed, holding up the
actuator body
12 against the hexagon.
For information about the special wrench, see:
www.burkert.com → Type 2000 → Maintenance-EU-ML,
section Installation wrench.
→
For control function A (CFA): Pressurize lower control air con-
nection with compressed air (5 bar).
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Unscrew actuator on the valve body 1 .
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Support swivel plate 3 with the help of a prism, knock out pin 4
with a pin punch and pull out swivel plate.
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Mount new swivel plate 3 align and secure with new pin 4 .
note!
For valves with "R" sleeves 3* , insert in swivel plate 3 and align
drilled holes.
Pin
Swivel plate
Graphite seal
English
→
Calk pin bores on both sides of the swivel plate with chisel or prick
punch.
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Carefully remove old graphite seal 5 from valve body 1 .
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Insert new graphite seal 5 .
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Only for VA body: Lubricate nipple thread 6 with Klüber paste
UH1 96-402.
→
Only for type 2002: Use sealing tape.
note!
Damage to the seat contour!
• During installation, take care that there is no damage to the seat
contour.
• Observe tightening torques according to “Tab. 1”.
→
For control function A (CFA): Pressurize lower control air con-
nection with compressed air (5 bar).
→
Screw in valve actuator with nipple 6 into the body.
→
Only for control function A (CFA): Rescrew cover 31 with
special wrench.
→
Check the valve for function and leaks.
Tightening torques
DN
(mm)
Tightening torques
(Nm)
15 45
20 50
25 60
32 65
40 65
50 70
65 70
Tab. 1: Valve body tightening torques
English
CHaNGING THe Seal SeT
Change seal set with actuator with control function A (locked by
spring force in the rest position), control function B (opened by spring
force in the rest position) and control function I (dual acting)
note!
The actuator must be completely removed to replace all the seals.
A special Bürkert assembly sleeve is required to mount the packing
gland.
Do not use any pointed or sharp instruments!
→
Mount valve 1 on the body.
CAutIon!
Danger through taut springs!
• Carefully open piston actuator!
→
Unscrew cover 31 with special wrench holding up the actuator body
12 against the hexagon.
→
Only for actuator size G (100 mm) and H (125 mm): Remove
washer
40 .
→
For control function A: Remove pressure springs 28 29 .
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Remove position indicator 26 with Allen key.
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For control function A (CFA): Pressurize lower control air con-
nection with compressed air (5 bar).
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Screw actuator on the nipple 6 out of the valve body 1 .
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Carefully screw in actuator on the swivel plate 3 (only put pressure
on the upper section of the swivel plate).
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Release nuts 25 .
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Remove pistons 22 with supporting washer 24 .
The following operations must only be carried out with valves
without identification "R":
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For control function A: Remove filler piece 19 with intermediate
washer 20 and O-ring 21 .
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For control function B: Remove intermediate washer 20 , O-ring
21 and pressure spring 35 .
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For control function I: Remove filler piece with intermediate
washer
20 and O-ring 21 (spring 35 missing).
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Remove spindle 2 from actuator body 12 and clean spindle thread.
→
Clamp actuator on the nipple hexagon 6 .
English