BA-PM400-500-english-D08853.pdf - 第4页
pressure. This also applies when the pump restarts after the power has been cut off for a short period. The components to be connected to the pump must be designed to withstand the pneumatic data of the pumps (see Sectio…
1. Description,
Operating Conditions
The pumps transfer, and evacuate 100
% oil-free. In operation they are gas-
tight, and maintenance-free.
The self drying pumps make it possible
during evacuation to blow the conden-
sed liquid out of the pump heads at
high speed, while maintaining the
vacuum in the recipient at a constant
level. After drying the pump heads the
pumps achieve a greatly improved
vacuum and evacuate much faster
than pumps without a drying system.
The control for the drying system is
effected via solenoid valve and three
variables:
The time between switching on the
drying system and the first ventila-
tion of the pump heads (t
1
)
The duration of the ventilation of
the pump heads (t
2
)
The interval between pump head
ventilation operations (t
3
).
This pump model is equipped with the
solenoid valve for ventilating the pump
heads. The scope of delivery does not
include control electronics.
1.1 Electrical Equipment
See section 8 for full electrical
data.
The pumps are fitted with a thermal
-switch to protect against over-
loading.
1.2 Operating Conditions
The pumps and/or the drying
system must not be used in
areas where there is a danger of
explosion.
These pumps must not be used if
the entry of air into the pump
during venting (drying system)
could result in the creation of reac-
tive, explosive or otherwise hazar-
dous mixtures.
Prior to any use of the pump en-
sure that the creation of reactive,
explosive or otherwise hazardous
mixtures during the supply of air is
prevented.
For maximum permissible operating
pressure, ultimate vacuum, and
flow capacity: see chapter 8.
The pumps must not be used for
liquids. You will find suitable liquid
pumps in our Product Program.
If your potential application lies outside
the above limits discuss it with our
technical adviser (see last page for
contact telephon number).
1.3 Ambient Condition
When the pumps are operating the fol-
lowing ambient conditions must be
maintained:
The pumps and/or the drying
system must not be used in
areas where there is a danger of
explosion.
Ambient temperature during opera-
tion: between + 5 °C .... + 40 °C.
During operation an adequate
supply of air for cooling must be
provided.
2. Safety
Note that the pumps may only be
used for their intended purpose.
The pumps and/or the drying
system must not be used in
areas where there is a danger of
explosion.
These pumps must not be used if
the entry of air into the pump
during venting (drying system)
could result in the creation of reac-
tive, explosive or otherwise hazar-
dous mixtures.
Prior to any use of the pump en-
sure that the creation of reactive,
explosive or otherwise hazardous
mixtures during the supply of air is
prevented.
Components connected to the
pumps must be designed to with-
stand the pneumatic performance
of the pumps (see chapter 8).
Plug the pump only into properly
installed grounded outlets.
When the operation of the pump is
interrupted by the thermal switch, it
will re-start automatically after
cooling down. Take all care neces-
sary to prevent this leading to a
dangerous situation.
Specific safety instructions and
measures for the media being
handled must be observed.
Parts of the casing marked with the
sign below are only allowed to be
opened after pulling out the plug
(disconnecting the power source).
Use only original KNF replacement
parts.
3. Installation
Choose a safe location (flat sur-
face for the pump).
Install the pump so as to ensure
adequate flow of air cooling.
Connect the suction and pressure
lines (tube ID 10 mm).
Arrange the pressure line so
that condensate can flow out
of the the pump (falling pipe).
The condensate is conducted out
of the pump via the pressure line.
A container is to be installed to
catch the condensate.
The solenoid valve must be
connected to the drying system
control electronics (not included in
scope of delivery); see fig. 1.
Plug the pump only into properly
installed grounded outlets.
Compare the supply data with the
elecetrical data of the pump. The
voltage must not vary by more than
+ 10 %, and -10 % from that shown
on the type-plate.
4. Operating Instructions
4.1 Operating Conditions
The pumps and/or the drying
system must not be used in
areas where there is a danger of
explosion.
These pumps must not be used if
the entry of air into the pump
during venting (drying system)
could result in the creation of reac-
tive, explosive or otherwise hazar-
dous mixtures.
Prior to any use of the pump en-
sure that the creation of reactive,
explosive or otherwise hazardous
mixtures during the supply of air is
prevented.
Specific safety instructions for the
media being handled must be
observed.
The pumps must not start against
PM 16527-860.3-2.00 e 11/05 Symbols: = Position in the illustration, = Important point, = Task, = Advise to user Warning KNF resrve the right to make changes
2
pressure. This also applies when
the pump restarts after the power
has been cut off for a short period.
The components to be connected
to the pump must be designed to
withstand the pneumatic data of
the pumps (see Section 8).
The maximum permissible opera-
ting pressure (1 bar g) must not be
exceeded.
To prevent the maximum permis-
sible operating pressure being
exceeded, restriction or control of
the air or gas flow should only be
carried out in the suction line.
If restriction or control of the air or
gas flow is made on the pressure
side ensure that the maximum per-
missible operating pressure is not
exceeded.
When the pump is at a standstill
the inlet and the outlet must be at
normal atmospheric pressure.
Ensure the pump outlet is not clo-
sed or restricted.
Diaphragm and valve plates are the
only parts subject to wear. Wear is
usually indicated by a drastic
reduction in the pneumatic perfor-
mance. When replacing parts pro-
ceed as described in section 5.
Ambient conditions: see chapter
1.3.
4.2 Operation
Taking the pump into operation
Plug the mains plug of the pump
into a properly installed safety
socket.
Switch the pump on at the pump
mains switch (see fig. 1).
If cyclic drying of the pump heads
is required in the current evacu-
ation process, switch the drying
system on at the mains switch of
the control system (not included in
scope of delivery).
The drying system should only
be switched on if a container
has been attached to the pres-
sure line of the pump which will
catch the condensate; other-
wise the condensate will flow
out uncontrolled.
Check:
Tubing for correct tubing.
Electrical connections for correct
connection.
After the evacuation/process has been
completed, take the pump out of ope-
ration:
Purge the pump including the
connecting hoses with air at full
flow rate for about 5 minutes.
If the drying system is switched
on:
Switch the drying system off at the
mains switch of control system
(not included in scope of delivery).
Switch the pump off at the mains
switch of the pump.
Pull the mains plug of the pump out
of the socket.
5. Servicing:
Changing Diaphragms and Valve
Plates/Sealings
The diaphragms in both pump heads
should be changed at the same time.
When diaphragms are changed, valve
plates/sealings should also be repla-
ced. If the diaphragms are not changed
in both heads at the same time or dia-
phragms and valve plates/sealings are
not changed at the same time the
nominal performance of the pump is
not guaranteed after the service.
If a pump has been used for
aggressive or toxic substances or
other types of substances which
are hazardous, hazardous to health,
or injurious, the following points
must be observed:
1.) Clean the pump and its compo-
nents before servicing.
2.) Ensure that the service personnel
is not subject to a health hazard.
Apply the safety and protection
measures that are necessary for
the medium that has been handled
by the pump (example: the use of
protective gloves).
3.) Ensure that discarded parts and
materials are safely and correctly
PM 16527-860.3-2.00 e 11/05
3
Fig. 1: Pump PM 16527-N 860.3-2.00
Fan cover
Connecting box of the pump
Mains switch
for tube ID 10
6 mm deep
blue
brown
voltage valve
disposed of.
Use only original KNF replacement
parts.
Parts and tools required:
1 Service Set (see section 7)
Screwdriver blade width 2 mm
Phillips screwdriver No. 2
Felt-tip pen.
Change the diaphragms and valve pla-
tes/sealings in the following sequence:
a) Preparatory steps
b) Removing pump head
c) Changing diaphragm
d) Changing valve plates/ sealings
e) Refitting pump head
f) Final steps.
The position numbers in the
following text refer to fig. 2.
a.) Preparatory Steps
Shut down system (see section 4.2)
including disconnecting the pump
from the power source (pull out
plug of pump).
Remove tubing from the inlet and
outlet connectors of the pump.
On the pneumatic head connec-
tions, loosen one of the union nuts
by hand. Then slightly loosen the
angle-fitting in the pump head by
turning it anticlockwise
, so that the
connecting tube can be pulled out
Undo the screws that hold the
fan cover (see fig. 1) and remove
the fan cover from the motor.
b) Removing pump head
(for each head separately)
Mark the position of top plate ,
head plate , intermediate plate
, and housing relative to each
other with a felt-tip pen. This is to
ensure that the parts will be re-
assembled cor rectly at a later
stage.
Undo the eight screws and lift
the pump head off the housing .
The solenoid valve of the
drying system remains fitted
in this situation.
c) Changing diaphragm
Position the pump so that the dia-
phragm surface is upwards.
Turn the fan to bring the structured
diaphragm to top dead centre.
Using a small screwdriver, bet-
ween the housing and the outer
edge of the structured diaphragm,
carefully lift the edge of the dia-
phragm lightly upwards at one
point (making sure not to damage
the housing). Now grip the edge of
the diaphragm on opposite sides,
unscrew it by turning anti-clock-
wise.
Take the diaphragm spacer(s) off
the connecting rod and retain
them.
Check that all parts are free from
dirt and clean them if necessary.
Put the diaphragm spacer(s)
on the thread of the new dia-
phragm.
Fit the new structured diaphragm
: hold the connecting rod with
one finger, and gently screw in
(clockwise) the structured dia-
phragm with diaphragm spacers.
Turn the fan until the structured
diaphragm is at the top dead cent-
re. Using a small screwdriver, bet-
ween the housing and the outer
edge of the structured diaphragm,
carefully lift the edge of the dia-
phragm lightly upwards at one
point. Now grip the edge of the dia-
phragm on opposite sides (do not
overstretch the diaphragm!) and
tighten the structured diaphragm
clock-wise.
d) Changing valve plates/sealings
Undo the two screws .
Separate the head plate with
top plate from intermediate
plate .
Remove the valve plates/sealings
from the intermediate plate.
Check that the valve seats, the
head plate and intermediate plate
are clean. If scratches, distortion,
or corrosion are evident on these
parts they should be replaced.
Lay the new valve plates/sealings
in the recesses in the interme-
diate plate. The valve plates/sea-
lings for suction and pressure sides
are identical, as are upper and
lower sides of the plates/sealings.
e) Refitting pump head
Turn the fan to bring the structured
diaphragm to medium position.
Place the intermediate plate ,
with valve plates/sealings on
the housing, in the position indica-
ted by the felt-tip pen marking.
Place the head plate on the
intermediate plate in the posi-
tion indicated by the felt-tip pen
marking.
Place top plate in position
PM 16527-860.3-2.00 e 11/05
4
X
X
Fig. 2: Cross section of pump heads (symbolic)
Specification
Pos Description
Top plate
Head plate
Intermediate plate
Housing
Cross recessed raised counter-
sunk head screw
Structured diaphragm
Diaphragm spacers(s)
Connecting rod
Cross recessed raised cheese
head screw
Disk spring
Valve plate/Sealing