Burkert Type 2000 - Manuel (Page 2)

2
SYMBOLS
→
designates a procedure which you must carry out.
▶ designates instructions for risk prevention.
Warning of injuries:
DANGER!
Immediate danger! Serious or fatal injuries.
WARNING!
Possible danger! Serious or fatal injuries.
CAUTION!
Danger! Moderate or minor injuries.
Warning of damage:
NOTE!
SPARE PARTS
CAUTION!
Risk of injury and/or damage by the use of incorrect parts!
Incorrect accessories and unsuitable spare parts may cause injuries and damage
the device and the surrounding area.
▶ Use original accessories and original spare parts from Bürkert only.
To prevent injuries:
▶ Only trained technicians may perform installation and maintenance work.
The valve set is available as a spare part set for type 2000 INOX (also see
illustration on page 3). This consists of:
• Pendulum disc, consisting of: seal holder, seat seal, centering
• Graphite seal (can also be ordered separately)
REMOVING THE ACTUATOR
Before the pendulum disc can be replaced, the actuator must be removed
from the valve housing.
DANGER!
Risk of injury from discharge of medium and release of pressure!
It is dangerous to remove a device which is under pressure due to the
sudden release of pressure or discharge of medium.
▶ Before removing the device, switch off the pressure and vent the lines.
WARNING!
Risk of injury when opening the actuator!
The actuator contains a tensioned spring. If the actuator is opened, there is a
risk of injury from the spring jumping out!
▶ The actuator must not be opened.
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3
REPLACING THE PENDULUM DISC
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Counter spindle on the wrench flat using open-end wrench (wrench size 7).
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Carefully loosen centering using a suitable open-end wrench (wrench size
5.5) to prevent damaging the spindle thread.
→
Unscrew centering.
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Remove seal holder
together with seat seal.
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Attach new seal holder and
new seat seal to spindle.
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Apply adhesive (Loctite
640) to spindle thread.
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Screw on new centering
and tighten using a suitable
open-end wrench (wrench
size 5.5).
Observe tightening torque
40 ± 3 Nm!
Pendulum disc
Seal holder
Seat seal
Centering
Graphite seal
Spindle
Wrench flat
Fig. 1: Replacing the pendulum disc
WARNING!
Risk of injury from damaged devices!
If the tightening torque is too great, the spindle thread may be damaged.
▶ Observe tightening torque (40 ± 3 Nm).
Risk of injury if the wrong tools are used!
It is dangerous to use unsuitable tools for installation work as the device may
be damaged.
▶ To remove the actuator from the valve housing, use an open-end wrench,
never a pipe wrench.
→
Clamp the valve housing into a
holding device (applies only to
valves not yet installed).
NOTE!
Damage to the seat seal or
the seat contour!
▶ When removing the actuator,
ensure that the valve is in the
open position.
Optical position indicator
Yellow = valve open
Actuator
Wrench flat for open-end
wrench (hexagonal)
Valve housing
For control function A:
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Pressurize control air connection with compressed air (5.5 bar) so that the
pendulum disc is lifted off the valve seat and is not damaged.
For control function B it is not necessary to apply compressed air for removal.
→
Place a suitable open-end wrench (wrench size 22) on the wrench flat of
the nipple.
→
Unscrew the actuator off the valve housing.
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4
INSTALLING THE ACTUATOR
DANGER!
Unsuitable lubricant may contaminate the medium.
In oxygen applications there is a risk of explosion.
▶ Only use approved lubricants for specific applications, such as oxygen or
analytical applications.
WARNING!
Risk of injury from unintentional activation of the system and uncon-
trolled restart!
▶ Secure system against unintentional activation.
▶ Following assembly, ensure a controlled restart.
Risk of injury from damaged devices!
If the wrong tools are used for assembly work, the device may be damaged.
▶ To install the actuator on the valve housing, use an open-end wrench,
never a pipe wrench.
→
Grease pipe thread before re-installing the actuator
(e.g. with Klüber paste UH1 96-402 from Klüber).
→
Check graphite seal and, if
required, replace.
Graphite
seal
For control function A:
→
Pressurize control air connection with compressed air (5.5 bar) so that
the pendulum disc is lifted off the valve seat and is not damaged when
screwed in.
For control function B it is not necessary to apply compressed air for
assembly.
→
Screw actuator into the valve housing.
Observe tightening torque 40 ± 3 Nm!
If the position of the control air connection for assembly of the hose
is unfavorable, it can be aligned steplessly by rotating the actuator
through 360°.
If you have any queries, please contact your Bürkert sales office.
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Type 2000 INOX