KNF N816.1.2 KN.18, N816.1.2 KT.18, N838.1.2 KN.18, N838.1.2 KT.18, N816.3 KN.18 User guide
...Page 1
Operating Instructions
Read and observe these Operating Instructions!
Laboport® Mini Laboratory Pumps
N816.1.2 KN.18
N816.1.2 KT.18
N838.1.2 KN.18
N838.1.2 KT.18
N816.3 KN.18
N816.3 KT.18
N838.3 KN.18
N838.3 KT.18
N816.1.2 KN.45.18
N816.1.2 KT.45.18
N838.1.2 KN.45.18
N838.1.2 KT.45.18
N816.3 KN.45.18
N816.3 KT.45.18
N838.3 KN.45.18
N838.3 KT.45.18
KNF Neuberger GmbH
Alter Weg 3
D-79112 Freiburg
Germany
Phone +49-(0)7664 / 5909-0
Fax +49-(0)7664 / 5909-99
E-Mail: [email protected]
www.knf.de
Contents Page
1. About this document.................................................................. 3
2. Use ............................................................................................ 4
3. Safety ........................................................................................ 5
4. Technical Data .......................................................................... 7
5. Design and Function ............................................................... 17
6. Installation and connection ...................................................... 20
7. Operation ................................................................................. 21
8. Servicing .................................................................................. 24
9. Troubleshooting ....................................................................... 31
10. Spare parts and accessories ................................................... 33
11. Returns .................................................................................... 35
12. Health and safety clearance and decontamination form ......... 36
KNF 121446-121449 04/16
Translation of original Operating Instructions, english Keep for future use!
Page 2
Page 3
Mini Laboratory pumps N 816.18, N 838.18 About this document
WARNING
A danger warning is located here.
Possible consequences of a failure to observe the
warning are specified here. The signal word, e.g.
Warning, indicates the danger level.
Measures for avoiding the danger and its conse-
quences are specified here.
Signal word
Meaning
Consequences if not observed
DANGER
warns of immediate danger
Death or serious injuries
and/or serious damage are the
consequence.
WARNING
warns of possible
danger
Death or serious injuries
and/or serious damage are
possible.
CAUTION
warns of a possibly
dangerous situation
Minor injuries or damage are
possible.
This symbol refers to important information.
Project pumps
1. About this document
1.1. Using the Operating Instructions
The Operating Instructions are part of the pump.
Carefully study the Operating Instructions before using a
pump.
Always keep the Operating Instructions handy in the work
area.
Pass on the Operating Instructions to the next owner.
Customer-specific project pumps (pump models which begin with
“PJ” or “PM”) may differ from the Operating Instructions.
For project pumps, also observe the agreed upon specifica-
tions.
1.2. Symbols and Markings
Warning
Danger levels
Tab. 1
Other information and symbols
An activity to be carried out (a step) is specified here.
1. The first step of an activity to be carried out is specified here.
Additional, consecutively numbered steps follow.
Translation of original Operating Instructions, English, KNF 121446-121449 04/16 3
Page 4
Use Mini Laboratory pumps N 816.18, N 838.18
Operating parameters and
conditions
Requirements for
transferred medium
Accessories
2. Use
2.1. Proper use
The pumps are exclusively intended for transferring gases and
vapors.
Owner's responsibility
Only install and operate the pumps under the operating parameters
and conditions described in chapter 4, Technical data.
Make sure that the installation location is dry and the pump is
protected against rain, splash, hose and drip water.
Before using a medium, check whether the medium can be transferred danger-free in the specific application case.
Before using a medium, check the compatibility of the materials of
the pump head, diaphragm and valves with the medium.
Only transfer gases which remain stable under the pressures and
temperatures occurring in the pump.
Laboratory equipment or additional components connected to a
pump have to be suitable for use with the pneumatic capabilities of
the pump.
2.2. Improper use
The pumps may not be operated in an explosive atmosphere.
The pumps are not suitable for transferring dusts.
The pumps are not suitable for transferring liquids.
The pumps must not be used to create vacuum and overpressure
simultaneously.
An overpressure must not be applied to the suction side of the
pump.
4 Translation of original Operating Instructions, English, KNF 121446-121449 04/16
Page 5
Mini Laboratory pumps N 816.18, N 838.18 Safety
Note the safety precautions in chapters
6. Installation and connection, and 7. Operation.
Personnel
Working in a safety-
conscious manner
Fig. 1: Notice sticker
Handling dangerous media
Handling flammable media
Environmental protection
3. Safety
The pumps are built according to the generally recognized rules of
technology and in accordance with the occupational safety and
accident prevention regulations. Nevertheless, dangers can result
during their use which lead to injuries to the user or others, or to
damage to the pump or other property.
Only use the pumps when they are in a good technical and proper
working order, in accordance with their intended use, observing the
safety advice within the operating instructions, at all times.
Make sure that only trained and instructed personnel or specially
trained personnel work on the pumps. This especially applies to
assembly, connection and servicing work.
Make sure that the personnel has read and understood the operating instructions, and in particular the "Safety" chapter.
Observe the accident prevention and safety regulations when
performing any work on the pump and during operation.
Do not expose any part of your body to the vacuum.
Open housing parts with notice sticker (see fig. 1) only after
separating mains plug from power source.
When transferring dangerous media, observe the safety regulations when handling these media.
Be aware that the pumps are not designed to be explosion-proof.
Make sure the temperature of the medium is always sufficiently
below the ignition temperature of the medium, to avoid ignition or
explosion. This also applies for unusual operational situations.
Note that the temperature of the medium increases when the pump
compresses the medium.
Hence, make sure the temperature of the medium is sufficiently
below the ignition temperature of the medium, even when it is
compressed to the maximum permissible operating pressure of the
pump. The maximum permissible operating pressure of the pump
is stated in the technical specifications (see chapter 4).
Translation of original Operating Instructions, English, KNF 121446-121449 04/16 5
If necessary, consider any external sources of energy, such as
radiation, that may add heat to the medium.
In case of doubt, consult the KNF customer service.
Store all replacement parts in a protected manner and dispose of
them properly in accordance with the applicable environmental
protection regulations. Observe the respective national and international regulations. This especially applies to parts contaminated
with toxic substances.
Page 6
Safety Mini Laboratory pumps N 816.18, N 838.18
Standards
Customer service and
repairs
The pumps conform to the Directive 2011/65/EU (RoHS2).
The pumps conform to the safety regulations of the EC Directive
2014/30/EU concerning Electromagnetic Compatibility and the EC
Directive 2006/42/EC concerning Machinery.
The following harmonized standards have been used:
DIN EN 61010-1
DIN EN 61326-1 – class A
DIN EN 50581
The pumps correspond to IEC 664:
the overvoltage category II
the pollution degree 2
Only have repairs to the pump carried out by the KNF Customer
Service responsible.
Only authorized personnel should open those parts of the housing
that contain live electrical parts.
Use only genuine parts from KNF for servicing work.
6 Translation of original Operating Instructions, English, KNF 121446-121449 04/16
Page 7
Mini Laboratory pumps N 816.18, N 838.18 Technical Data
All pumps are secured against overheating with thermal
switches and are equipped with a mains fuse.
N 816.1.2 KN.18
N 816.1.2 KN.45.18
N 816.3 KN.18
N 816.3 KN.45.18
Component
Pump material
Pump head
PPS
Diaphragm
EPDM
Valves/Sealings
EPDM
N 838.1.2 KN.18
N 838.1.2 KN.45.18
N 838.3 KN.18
N 838.3 KN.45.18
Component
Pump material
Pump head
PPS
Diaphragm
EPDM
Valves/Sealings
FPM
N 816.1.2 KT.18
N 816.1.2 KT.45.18
N 816.3 KT.18
N 816.3 KT.45.18
N 838.1.2 KT.18
N 838.1.2 KT.45.18
N 838.3 KT.18
N 838.3 KT.45.18
Component
Pump material
Pump head
PPS
Diaphragm
PTFE-coated
Valves/Sealings
FFPM
Refer to the type plate for the pump’s electrical configuration.
4. Technical Data
Pump materials
Tab. 2
Tab. 3
Tab. 4
Translation of original Operating Instructions, English, KNF 121446-121449 04/16 7
Page 8
Technical Data Mini Laboratory pumps N 816.18, N 838.18
N 816.1.2 KN.45.18
N 816.3 KN.45.18
Component
Material
Vacuum gauge, spindle, double
nipple, reduction nipple
Brass (nickel-plated, tinned,
thick film passivated)
Distribution piece
PP
Hose connector
PA
Sealing ring vacuum gauge
PTFE
Sealing ring spindle
EPDM
O-ring spindle
FPM
Silencer
Vyon
N 816.1.2 KT.45.18
N 816.3 KT.45.18
Component
Material
Vacuum gauge, spindle, double
nipple, reduction nipple
Brass (nickel-plated, tinned,
thick film passivated)
Distribution piece
PP
Hose connector
PP
Sealing ring vacuum gauge
PTFE
Sealing ring spindle
EPDM
O-ring spindle
FPM
Silencer
Vyon
N 838.1.2 KN.45.18
N 838.1.2 KT.45.18
N 838.3 KN.45.18
N 838.3 KT.45.18
Component
Material
Vacuum gauge, spindle, double
nipple, reduction nipple
Brass (nickel-plated, tinned,
thick film passivated)
Distribution piece
PP
Hose connector
PVDF
Sealing ring vacuum gauge
PTFE
Sealing ring spindle
FPM
O-ring spindle
FPM
Silencer
Vyon
Fine-adjustment valve materials
Tab. 5
Tab. 6
Tab. 7
8 Translation of original Operating Instructions, English, KNF 121446-121449 04/16
Page 9
Mini Laboratory pumps N 816.18, N 838.18 Technical Data
Pneumatic performance
Max. permissible operating
pressure [bar g]
0.5
Ultimate vacuum [mbar abs.]
100
Delivery rate at atm. pressure
[l/min]*
30
Pneumatic connections
Hose connection [mm]
ID 6
Ambient and media temperature
Permissible
ambient temperature
+ 5 °C to + 40 °C
Permissible
media temperature
+ 5 °C to + 40 °C
Other parameters
Weight [kg]
3.95
Dimensions: L x H x W [mm]
361 x 141 x 102
Maximum permissible ambient
relative humidity
80 % for temperatures up to
31 °C, decreasing linearly to
50 % at 40 °C
Max. altitude of site
[m above sea level]
2000
Electrical Data
Voltage [V]
100
115
230
Frequency [Hz]
50/60
60
50
Max. operating current [A]
1.4
0.9
0.6
Power consumption pump [W]
100
100
100
Maximum permitted mains
voltage fluctuations
+/- 10 %
+/- 10 %
+/- 10 %
Fuse pump**
(2x) T [A]
2.5
2.5
1.25
Protection class motor
IP20
N 816.1.2 KN.18
N 816.1.2 KN.45.18
Translation of original Operating Instructions, English, KNF 121446-121449 04/16 9
Tab. 8 *Liters in standard state (1,013 mbar)
**For spare part-No. see chapter 10
Page 10
Technical Data Mini Laboratory pumps N 816.18, N 838.18
Pneumatic performance
Max. permissible operating
pressure [bar g]
0.5
Ultimate vacuum [mbar abs.]
160
Delivery rate at atm. pressure
[l/min]*
30
Pneumatic connections
Hose connection [mm]
ID 6
Ambient and media temperature
Permissible
ambient temperature
+ 5 °C to + 40 °C
Permissible
media temperature
+ 5 °C to + 40 °C
Other parameters
Weight [kg]
3.95
Dimensions: L x H x W [mm]
361 x 141 x 102
Maximum permissible ambient
relative humidity
80 % for temperatures up to
31 °C, decreasing linearly to
50 % at 40 °C
Max. altitude of site
[m above sea level]
2000
Electrical Data
Voltage [V]
100
115
230
Frequency [Hz]
50/60
60
50
Max. operating current [A]
1.4
0.9
0.6
Power consumption pump [W]
100
100
100
Maximum permitted mains
voltage fluctuations
+/- 10 %
+/- 10 %
+/- 10 %
Fuse pump**
(2x) T [A]
2.5
2.5
1.25
Protection class motor
IP20
N 816.1.2 KT.18
N 816.1.2 KT.45.18
10 Translation of original Operating Instructions, English, KNF 121446-121449 04/16
Tab. 9 *Liters in standard state (1,013 mbar)
**For spare part-No. see chapter 10
Page 11
Mini Laboratory pumps N 816.18, N 838.18 Technical Data
Pneumatic performance
Max. permissible operating
pressure [bar g]
0.5
Ultimate vacuum [mbar abs.]
15
Delivery rate at atm. pressure
[l/min]*
16
Pneumatic connections
Hose connection [mm]
ID 6
Ambient and media temperature
Permissible
ambient temperature
+ 5 °C to + 40 °C
Permissible
media temperature
+ 5 °C to + 40 °C
Other parameters
Weight [kg]
3.95
Dimensions: L x H x W [mm]
361 x 141 x 90
Maximum permissible ambient
relative humidity
80 % for temperatures up to
31 °C, decreasing linearly to
50 % at 40 °C
Max. altitude of site
[m above sea level]
2000
Electrical Data
Voltage [V]
100
115
230
Frequency [Hz]
50/60
60
50
Max. operating current [A]
1.4
0.9
0.6
Power consumption pump [W]
100
100
100
Maximum permitted mains
voltage fluctuations
+/- 10 %
+/- 10 %
+/- 10 %
Fuse pump**
(2x) T [A]
2.5
2.5
1.25
Protection class motor
IP20
N 816.3 KN.18
N 816.3 KN.45.18
Translation of original Operating Instructions, English, KNF 121446-121449 04/16 11
Tab. 10 *Liters in standard state (1,013 mbar)
**For spare part-No. see chapter 10
Page 12
Technical Data Mini Laboratory pumps N 816.18, N 838.18
Pneumatic performance
Max. permissible operating
pressure [bar g]
0.5
Ultimate vacuum [mbar abs.]
20
Delivery rate at atm. pressure
[l/min]*
16
Pneumatic connections
Hose connection [mm]
ID 6
Ambient and media temperature
Permissible
ambient temperature
+ 5 °C to + 40 °C
Permissible
media temperature
+ 5 °C to + 40 °C
Other parameters
Weight [kg]
3.95
Dimensions: L x H x W [mm]
361 x 141 x 90
Maximum permissible ambient
relative humidity
80 % for temperatures up to
31 °C, decreasing linearly to
50 % at 40 °C
Max. altitude of site
[m above sea level]
2000
Electrical Data
Voltage [V]
100
115
230
Frequency [Hz]
50/60
60
50
Max. operating current [A]
1.4
0.9
0.6
Power consumption pump [W]
100
100
100
Maximum permitted mains
voltage fluctuations
+/- 10 %
+/- 10 %
+/- 10 %
Fuse pump**
(2x) T [A]
2.5
2.5
1.25
Protection class motor
IP20
N 816.3 KT.18
N 816.3 KT.45.18
12 Translation of original Operating Instructions, English, KNF 121446-121449 04/16
Tab. 11 *Liters in standard state (1,013 mbar)
**For spare part-No. see chapter 10
Page 13
Mini Laboratory pumps N 816.18, N 838.18 Technical Data
Pneumatic performance
Max. permissible operating
pressure [bar g]
0.5
Ultimate vacuum [mbar abs.]
100
Delivery rate at atm. pressure
[l/min]*
37
Pneumatic connections
Hose connection [mm]
ID 10
Ambient and media temperature
Permissible
ambient temperature
+ 5 °C to + 40 °C
Permissible
media temperature
+ 5 °C to + 40 °C
Other parameters
Weight [kg]
6.8
Dimensions: L x H x W [mm]
402 x 212 x 110
Maximum permissible ambient
relative humidity
80 % for temperatures up to
31 °C, decreasing linearly to
50 % at 40 °C
Max. altitude of site
[m above sea level]
2000
Electrical Data
Voltage [V]
100
115
220
230
Frequency [Hz]
50/60
60
60
50
Max. operating current [A]
1.2
0.8
0.45
0.5
Power consumption pump [W]
80
80
80
80
Maximum permitted mains
voltage fluctuations
+/-
10 %
+/-
10 %
+/-
10 %
+/-
10 %
Fuse pump**
(2x) T [A]
2.5
1.6
1.0
1.0
Protection class motor
IP20
N 838.1.2 KN.18
N 838.1.2 KN.45.18
Translation of original Operating Instructions, English, KNF 121446-121449 04/16 13
Tab. 12 *Liters in standard state (1,013 mbar)
**For spare part-No. see chapter 10
Page 14
Technical Data Mini Laboratory pumps N 816.18, N 838.18
Pneumatic performance
Max. permissible operating
pressure [bar g]
0.5
Ultimate vacuum [mbar abs.]
150
Delivery rate at atm. pressure
[l/min]*
37
Pneumatic connections
Hose connection [mm]
ID 10
Ambient and media temperature
Permissible
ambient temperature
+ 5 °C to + 40 °C
Permissible
media temperature
+ 5 °C to + 40 °C
Other parameters
Weight [kg]
6.8
Dimensions: L x H x W [mm]
402 x 212 x 110
Maximum permissible ambient
relative humidity
80 % for temperatures up to
31 °C, decreasing linearly to
50 % at 40 °C
Max. altitude of site
[m above sea level]
2000
Electrical Data
Voltage [V]
100
115
220
230
Frequency [Hz]
50/60
60
60
50
Max. operating current [A]
1.2
0.8
0.45
0.5
Power consumption pump [W]
80
80
80
80
Maximum permitted mains
voltage fluctuations
+/-
10 %
+/-
10 %
+/-
10 %
+/-
10 %
Fuse pump**
(2x) T [A]
2.5
1.6
1.0
1.0
Protection class motor
IP20
N 838.1.2 KT.18
N 838.1.2 KT.45.18
14 Translation of original Operating Instructions, English, KNF 121446-121449 04/16
Tab. 13 *Liters in standard state (1,013 mbar)
**For spare part-No. see chapter 10
Page 15
Mini Laboratory pumps N 816.18, N 838.18 Technical Data
Pneumatic performance
Max. permissible operating
pressure [bar g]
0.5
Ultimate vacuum [mbar abs.]
12
Delivery rate at atm. pressure
[l/min]*
22
Pneumatic connections
Hose connection [mm]
ID 10
Ambient and media temperature
Permissible
ambient temperature
+ 5 °C to + 40 °C
Permissible
media temperature
+ 5 °C to + 40 °C
Other parameters
Weight [kg]
6.8
Dimensions: L x H x W [mm]
402 x 212 x 110
Maximum permissible ambient
relative humidity
80 % for temperatures up to
31 °C, decreasing linearly to
50 % at 40 °C
Max. altitude of site
[m above sea level]
2000
Electrical Data
Voltage [V]
100
115
220
230
Frequency [Hz]
50/60
60
60
50
Max. operating current [A]
1.2
0.8
0.45
0.5
Power consumption pump [W]
80
80
80
80
Maximum permitted mains
voltage fluctuations
+/-
10 %
+/-
10 %
+/-
10 %
+/-
10 %
Fuse pump**
(2x) T [A]
2.5
1.6
1.0
1.0
Protection class motor
IP20
N 838.3 KN.18
N 838.3 KN.45.18
Translation of original Operating Instructions, English, KNF 121446-121449 04/16 15
Tab. 14 *Liters in standard state (1,013 mbar)
**for spare part-No. see chapter 10
Page 16
Technical Data Mini Laboratory pumps N 816.18, N 838.18
Pneumatic performance
Max. permissible operating
pressure [bar g]
0.5
Ultimate vacuum [mbar abs.]
15
Delivery rate at atm. pressure
[l/min]*
22
Pneumatic connections
Hose connection [mm]
ID 10
Ambient and media temperature
Permissible
ambient temperature
+ 5 °C to + 40 °C
Permissible
media temperature
+ 5 °C to + 40 °C
Other parameters
Weight [kg]
6.8
Dimensions: L x H x W [mm]
402 x 212 x 110
Maximum permissible ambient
relative humidity
80 % for temperatures up to
31 °C, decreasing linearly to
50 % at 40 °C
Max. altitude of site
[m above sea level]
2000
Electrical Data
Voltage [V]
100
115
220
230
Frequency [Hz]
50/60
60
60
50
Max. operating current [A]
1.2
0.8
0.45
0.5
Power consumption pump [W]
80
80
80
80
Maximum permitted mains
voltage fluctuations
+/-
10 %
+/-
10 %
+/-
10 %
+/-
10 %
Fuse pump**
(2x) T [A]
2.5
1.6
1.0
1.0
Protection class motor
IP20
N 838.3 KT.18
N 838.3 KT.45.18
16 Translation of original Operating Instructions, English, KNF 121446-121449 04/16
Tab. 15 *Liters in standard state (1,013 mbar)
**for spare part-No. see chapter 10
Page 17
Mini Laboratory pumps N 816.18, N 838.18 Design and Function
1 Outlet (pressure side)
2 Pneumatic connection
3 Pump head
4 Inlet (suction side)
5 Power switch
5
1 Inlet (suction side)
2 Pneumatic connection
3 Outlet (pressure side)
4 Pump head
5 Power switch
1 Inlet (suction side)
2 Pump head
3 Outlet (pressure side)
4 Pneumatic connection
5 Power switch
5. Design and Function
Design N 816.1.2 K_.18
Fig. 2
Design N 816.3 K_.18
Translation of original Operating Instructions, English, KNF 121446-121449 04/16 17
Fig. 3
Design N 838.1.2 K_.18
Fig. 4
Page 18
Design and Function Mini Laboratory pumps N 816.18, N 838.18
1 Inlet (suction side)
2 Pump head
3 Outlet (pressure side)
4 Pneumatic connection
5 Power switch
1 Inlet (suction side)
2 Outlet (pressure side)
3 Pneumatic connection
4 Pump head
5 Power switch
6 Fine-adjustment valve
7 Manometer
Design N 838.3 K_.18
Fig. 5
Design N 8__.1.2 __.45.18 and N 8__.3 __.45.18
18 Translation of original Operating Instructions, English, KNF 121446-121449 04/16
Fig. 6
Page 19
Mini Laboratory pumps N 816.18, N 838.18 Design and Function
1 Outlet valve
2 Inlet valve
3 Transfer chamber
4 Diaphragm
5 Eccentric
6 Connecting rod
7 Pump drive
Function Diaphragm Pump
Fig. 7: Pump head
Diaphragm pumps transfer, compress (depending on pump version) and evacuate gases and vapors.
The elastic diaphragm (4) is moved up and down by the eccentric
(5) and the connecting rod (6). In the downward stroke it aspirates
the gas to be transferred via the inlet valve (2). In the upward
stroke, the diaphragm presses the medium out of the pump head
via the outlet valve (1). The transfer chamber (3) is hermetically
separated from the pump drive (7) by the diaphragm.
Translation of original Operating Instructions, English, KNF 121446-121449 04/16 19
Page 20
Installation and connection Mini Laboratory pumps N 816.18, N 838.18
A marking on the pump head shows the direction of flow.
Before mounting the filter, unscrew the hose connector from
the thread in the pump head.
Dimensions
Cooling air supply
Installation location
Connected components
Pump exhaust
Connection
6. Installation and connection
Only install and operate the pumps under the operating parameters
and conditions described in chapter 4, Technical data.
Observe the safety precautions (see chapter 3).
6.1. Installation
Before installation, store the pump at the installation location to
bring it up to room temperature.
See chapter 4, Technical data, for the dimensions of pump.
Install the pump so that the motor fan can intake sufficient
cooling air.
Make sure that the installation location is dry and the pump is
protected against rain, splash, hose and drip water.
Choose a safe location (flat surface) for the pump.
Protect the pump from dust.
Protect the pump from vibrations and jolts.
6.2. Connection
Only connect components to the pump which are designed for
the pneumatic data of the pump (see chapter 4).
If the pump is used as a vacuum pump, safely discharge the
pump exhaust at the pump’s pneumatic outlet.
1. Remove the protective plugs from the pneumatic connectors of
the pump.
2. Mount accessory parts filter or silencer (if present).
3. Connect the suction line and pressure line (N 816._K_.18: tube
ID 6 mm and N 838._K_.18: tube ID 10 mm).
4. Lay the suction and pressure line at a downward angle to
prevent condensate from running into the pump.
5. Insert the power cable’s plug into a properly installed
shockproof socket.
20 Translation of original Operating Instructions, English, KNF 121446-121449 04/16
Page 21
Mini Laboratory pumps N 816.18, N 838.18 Operation
Operational requirements
Pump
All hoses attached properly
Fan openings not blocked
Specifications of the power supply correspond with
the data on the pump’s type plate.
The pump outlet is not closed or constricted.
WARNING
Hazard of the pump head bursting due to excessive
pressure increase
Do not exceed max. permissible operating
pressure (see chapter 4).
Monitor pressure during operation.
If the pressure exceeds the maximum permissi-
ble operating pressure, immediately shut down
pump and eliminate fault (see chapter 9. Troubleshooting).
Only throttle or regulate the air or gas quantity in
the suction line to prevent the maximum permissible operating pressure from being exceeded.
If the air or gas quantity in the pressure line is
throttled or regulated, make sure that the maximum permissible operating pressure of the
pump is not exceeded.
Excessive pressure (with all of the related hazards) can be
prevented by placing a bypass line with a pressure-relief valve
between the pressure and suction side of the pump. For further
information, contact your KNF technical adviser.
Pump standstill
7. Operation
7.1. Preparing for Start-up
Before switching on the pump, observe the following points:
Tab. 16
7.2. Starting
Only operate the pump under the operating parameters and
conditions described in chapter 4, Technical data.
Make sure the pump is used properly (see chapter 2.1).
Make sure the pump is not used improperly (see chapter 2.2).
Observe the safety precautions (see chapter 3).
Translation of original Operating Instructions, English, KNF 121446-121449 04/16 21
With the pump at a standstill, open pressure and suction lines
to normal atmospheric pressure.
Page 22
Operation Mini Laboratory pumps N 816.18, N 838.18
WARNING
Automatic starting can cause personal injury and
pump damage
When the operation of the pump is interrupted by the
thermal switch, the pump will restart automatically
after cooling down.
After triggering of the thermal protection or in the
event of power failure, remove the pump’s mains
plug from the socket so that the pump cannot
start uncontrollably.
Attempt work on the pump only if the pump is
separated from mains power.
The pump may not start up against pressure or suction during
switch-on. This also applies in operation following a brief power
failure. If a pump starts against pressure or vacuum, it may
block. This activates the thermal switch, and the pump
switches off.
7.3. Switching pump on and off
Switching pump on
Make sure that no vacuum or pressure is present in the lines
during switch-on.
Switch on pump with mains switch (see fig. 2 to 6, depending
on pump type)
Switching off the pump/removing from operation
When transferring aggressive media, flush the pump prior to
switch-off to increase the service life of the diaphragm (see
chapter 8.2.1).
Switch off pump with mains switch (see fig. 2 to 6, depending
on pump type).
Open pressure and suction lines to normal atmospheric pres-
sure.
Disconnect the power source.
22 Translation of original Operating Instructions, English, KNF 121446-121449 04/16
Page 23
Mini Laboratory pumps N 816.18, N 838.18 Operation
Fig. 8: Fine-adjustment valve
7.4. Adjusting flow volume (versions with fineadjustment valve)
Regulate the flow volume of the pump at the valve knob of
fine-adjustment valve (see fig. 8/1).
Translation of original Operating Instructions, English, KNF 121446-121449 04/16 23
Page 24
Servicing Mini Laboratory pumps N 816.18, N 838.18
Component
Servicing interval
Pump
Regular inspection for external damage
or leaks
Filter (Accessory)
Replace if it is dirty
Diaphragm and valve
plates/sealings
Replace at the latest, when pump
output decreases
When cleaning, make sure that no liquids enter the inside of
the housing.
8. Servicing
8.1. Servicing Schedule
Tab. 17
8.2. Cleaning
8.2.1. Flushing Pump
Before switching off the pump, flush it with air (if neccesary for
safety reasons: with an inert gas) for about five minutes under
atmospheric conditions (ambient pressure).
8.2.2. Cleaning Pump
As far as possible, clean the parts with a dry cloth.
Only use solvents for cleaning if the head materials cannot be
attacked (check the resistance of the material!).
If compressed air is available, blow out the components.
24 Translation of original Operating Instructions, English, KNF 121446-121449 04/16
Page 25
Mini Laboratory pumps N 816.18, N 838.18 Servicing
Spare part/tool
Service Set (according to chapter 10)
Philips-head screwdriver No. 2
Small screwdriver (blade width 0.5 mm)
Pencil
WARNING
Health hazard due to dangerous substances
in the pump!
Depending on the substance transferred, caustic
burns or poisoning are possible.
Wear protective clothing if necessary, e.g.
protective gloves.
Flush pump before replacing the diaphragm and
valve plates/sealings (see chapter 8.2.1).
Conditions
Spare parts/tools
Information on procedure
Fig. 9: Removing pump heads
8.3. Changing Diaphragm and Valves
8.3.1. N 816._K_.18
Pump is switched off and mains plug is removed from the
socket
Pump is clean and free of hazardous materials
Tubes removed from pump’s pneumatic inlet and outlet
Tab. 18
Always replace diaphragm and valve plates/sealings together
to maintain the pump performance.
Replace the diaphragms and valve plates/sealings of two-
headed pumps consecutively.
Translation of original Operating Instructions, English, KNF 121446-121449 04/16 25
Removing pump heads
1. At both pump heads: Mark the position of head plate (4),
intermediate plate (1), cover (13) and housing (14) relative to
each other by a drawing line (M) with a pencil. This helps avoid
incorrect assembly later.
2. At both pump heads: Undo the 4 screws (5) in the head plate
(4).
3. Remove both pump heads (each consisting of a head plate (4)
and intermediate plate (1)) together from the pump housing
(14).
Page 26
Servicing Mini Laboratory pumps N 816.18, N 838.18
Replace the diaphragms consecutively to ensure the same
number of diaphragm spacers is used as before.
Make sure the diaphragm spacers (12) on the thread of the
diaphragm (11) do not fall into the pump housing.
Replacing the valve plates/sealings of pump-heads
consecutively.
Fig. 10: Pump head
(exploded drawing)
Change diaphragm
1. Push down one diaphragm (11) to bring the other diaphragm to
top dead centre.
2. Lift the edge of the highest diaphragm (11) and, gripping it on
opposite sides, unscrew it by turning anti-clockwise.
3. Take the diaphragm spacers (12) off the threaded portion of
the diaphragm (11) and retain them.
4. Check that all parts are free from dirt and clean them if necessary (see chapter 6. Cleaning).
5. Put the diaphragm spacers (12) on the thread of the new
diaphragm (11).
6. Push down the diaphragm (11) of the second pump head until
the connecting rod (connecting part between motor shaft and
diaphragm) is at top dead centre.
7. Screw the new diaphragm (11), complete with diaphragm
spacers (12), into the connecting rod (clockwise) and tighten it
by hand.
8. Carry out steps 1 to 7 for the second pump head.
Changing the valve plates/sealings
1. Only for Pumps N 816.3 KN.18, N 816.3 KT.18,
N 816.3 KN.45.18 and N 816.3 KT.45.18:
Pull the connecting tube (10) out of one of the two head plates
(4); take care to ensure that the sealing (8) and the O-ring (9)
are not lost.
2. For one pump head: Use a small screwdriver to undo the two
screw caps (6) on the pump head and then undo the screws
(7).
3. Separate the head plate (4) from intermediate plate (1).
4. Remove the valve plates/sealings (2) from the intermediate
plate (1).
5. Check that the valve seats, intermediate plate (1) and the head
plate (4) are clean; if scratches or distortion are evident on
these parts they should be replaced.
6. Lay the new valve plates/sealings (2) in the recesses in the
intermediate plate (1). The valve plates/sealings for suction
and pressure sides are identical, as are upper and lower sides
of the valve plates/sealings.
26 Translation of original Operating Instructions, English, KNF 121446-121449 04/16
Page 27
Mini Laboratory pumps N 816.18, N 838.18 Servicing
For placement of disk spring (15) and washer (16) and for
orientation of disk spring see fig. 11.
It is necessary to ensure that the O-ring (9) lies on the end of
the connecting tube.
Make sure the cover (13) is placed on the pump head and is
not jammed. For this, carefully slide a small screw driver between the cover (13) and the pump head
If the cover is jammed between the intermediate plate (1) and
head plate (4), then the pump will not provide the nominal
pneumatical performance.
Fig. 11: Orientation disk spring
7. Check that the valve plates/sealings (2) are not deformed by
moving them gently sideways in their recesses.
8. Place the head plate (4) on the intermediate plate (1), in the
position indicated by the marking (M).
9. Check that the head plate (4) is centred by moving it gently
sideways.
10. Join the head plate (4) and the intermediate plate (1): Tighten
the two screws (7) (tightening torque: 70 Ncm).
11. Install the screw caps (6).
12. Carry out steps 2 to 11 for the second pump head.
13. Dispose of the old diaphragms and valve plates/sealings
properly.
Refit pump heads
1. Only for pumps N 816.3 KN.18, N 816.3 KT.18,
N 816.3 KN.45.18 and N 816.3 KT.45.18:
Put the sealing (fig. 10/8) into the head plate (4); push the connecting tube (10) into the hole in the head plate (4).
2. Place the two pump heads that are joined by the pneumatic
connecting tube(s) (10) on the housing according to the markings (M).
3. On both pump heads: Gently tighten the screws (5), evenly
and diagonally (tightening torque: 3 Nm).
Final steps
1. Reconnect suction and pressure line to the pump.
2. Reconnect the pump to the electricity supply.
If you have any question about servicing call your KNF technical
adviser (see last page for contact telephone number).
Translation of original Operating Instructions, English, KNF 121446-121449 04/16 27
Page 28
Servicing Mini Laboratory pumps N 816.18, N 838.18
Spare parts/tools
Service Set (according to chapter 10)
Philips-head screwdriver No. 2
Small screwdriver (blade width 0.5 mm)
Pencil
WARNING
Health hazard due to dangerous substances
in the pump!
Depending on the substance transferred, caustic
burns or poisoning are possible.
Wear protective clothing if necessary, e.g.
protective gloves.
Flush pump before replacing the diaphragm and
valve plates/sealings (see chapter 8.2.1).
Conditions
Spare parts/tools
Information on procedure
Fig. 12: Remove pump heads
8.3.2. 838._K_.18
Pump is switched off and mains plug is removed from the
socket
Pump is clean and free of hazardous materials
Tubes removed from pump’s pneumatic inlet and outlet
Tab. 19
Always replace diaphragm and valve plates/sealings together
to maintain the pump performance.
Replace the diaphragms and valve plates/sealings of the pump
heads consecutively.
Remove pump heads
1. At both pump heads: Mark the position of head plate (4),
2. At both pump heads: Undo the 4 screws (5) in the head plate
3. Remove both pump heads (each consisting of a head plate (4)
28 Translation of original Operating Instructions, English, KNF 121446-121449 04/16
intermediate plate (1), cover (13) and housing (14) relative to
each other by a drawing line (M) with a pencil. This helps avoid
incorrect assembly later.
(4).
and intermediate plate (1)) together from the pump housing
(14).
Page 29
Mini Laboratory pumps N 816.18, N 838.18 Servicing
Replace the diaphragms consecutively to ensure that the same
number of diaphragm spacers is used as before.
Make sure the diaphragm spacers (12) on the thread of the
diaphragm (11) do not fall into the pump housing.
Fig. 13: Pump head (Exploded
drawing)
Change diaphragm
1. Push down one diaphragm (11) to bring the other diaphragm to
top dead centre.
2. Lift the edge of the highest diaphragm (11) and, gripping it on
opposite sides, unscrew it by turning anti-clockwise.
3. Take the diaphragm spacers (12) off the threaded portion of
the diaphragm (11) and retain them.
4. Check that all parts are free from dirt and clean them if necessary (see chapter 6. Cleaning).
5. Put the diaphragm spacers (12) on the thread of the new
diaphragm (11).
6. Push down the diaphragm (11) of the second pump head until
the connecting rod (connecting part between motor shaft and
diaphragm) is at top dead centre.
7. Screw the new diaphragm (11), complete with diaphragm
spacers (12), into the connecting rod (clockwise) and tighten it
by hand.
8. Carry out steps 1 to 7 for the second pump head.
Changing the valve plates/sealings
1. For one pump head: Use a small screwdriver to undo the
screw cap (6) on the pump head and then undo the screw (7).
2. Separate the head plate (4) from intermediate plate (1).
3. Remove the valve plates/sealings (2) from the intermediate
plate (1).
4. Check that the valve seats, intermediate plate (1) and the head
plate (4) are clean; if scratches or distortion are evident on
these parts they should be replaced.
5. Lay the new valve plates/sealings (2) in the recesses in the
intermediate plate (1). The valve plates/sealings for suction
and pressure sides are identical, as are upper and lower sides
of the valve plates/sealings.
6. Check that the valve plates/sealings (2) are not deformed by
moving them gently sideways in their recesses.
7. Place the head plate (4) on the intermediate plate (1), in the
position indicated by the marking (M).
8. Check that the head plate (4) is centred by moving it gently
sideways.
9. Join the head plate (4) and the intermediate plate (1): Tighten
the screw (7) (tightening torque: 70 Ncm).
Translation of original Operating Instructions, English, KNF 121446-121449 04/16 29
Page 30
Servicing Mini Laboratory pumps N 816.18, N 838.18
For placement of disk spring (15) and washer (16) and for
orientation of disk spring see fig. 14.
Make sure the cover (fig. 12/13) is placed on the pump head
and is not jammed. For this, carefully slide a small screw driver
between the cover (13) and the pump head.
If the cover is jammed between the intermediate plate (1) and
head plate (4), then the pump will not provide the nominal
pneumatical performance.
Fig. 14: Orientation disk spring
10. Install the screw caps (6).
11. Carry out steps 1 to 10 for the second pump head.
12. Dispose of the old diaphragms and valve plates/sealings
properly.
Refit pump heads
1. Place the two pump heads that are joined by the pneumatic
connecting tube on the housing according to the markings (M).
2. On both pump heads: Gently tighten the screws (5), evenly
and diagonally (tightening torque: 3 Nm)
Final steps
1. Reconnect suction and pressure line to the pump.
2. Reconnect the pump to the electricity supply.
If you have any question about servicing call your KNF technical
adviser (see last page for contact telephone number).
30 Translation of original Operating Instructions, English, KNF 121446-121449 04/16
Page 31
Mini Laboratory pumps N 816.18, N 838.18 Troubleshooting
DANGER
Extreme danger from electrical shock!
Disconnect the pump power supply before working
on the pump.
Make sure the pump is de-energized and secure.
Pump produces no flow
Cause
Fault remedy
No voltage in the power source
Check room fuse and switch on if necessary.
Thermal switch has operated
following to over-heating.
Disconnect pump from mains.
Allow pump to cool.
Trace cause of over-heating and eliminate it.
Connections or lines blocked.
Check connections and lines.
Remove blockage.
External valve is closed or filter is
clogged.
Check external valves and filters.
Condensate has collected in pump
head.
Detach the condensate source from the pump.
Flush pump (see chapter 8.2.1).
Diaphragm or valve
plates/sealings are worn.
Replace diaphragm and valve plates/sealings
(see chapter 8.3).
Flow rate, pressure or vacuum too low
The pump does not achieve the output specified in the Technical data or the data sheet.
Cause
Fault remedy
Condensate has collected in pump
head.
Detach the condensate source from the pump.
Flush pump (see chapter 8.2.1).
There is gauge pressure on pressure side and at the same time
vacuum or a pressure above
atmospheric pressure on suction
side.
Change the pressure conditions.
Pneumatic lines or connection
parts have an insufficient cross
section.
Disconnect pump from system to determine output values.
Eliminate throttling (e.g. valve) if necessary.
Use lines or connection parts with larger cross section if
necessary.
Leaks occur on connections, lines
or pump head.
Check that tubes sit correctly on hose nozzles.
Replace leaky tubes.
Eliminate leaks.
Connections or lines completely or
partially jammed.
Check connections and lines.
Remove the jamming parts and particles.
Head parts are soiled.
Clean head components.
Diaphragm or valve
plates/sealings are worn.
Replace diaphragm and valve plates/sealings,
(see chapter 8.3).
9. Troubleshooting
Check the pump (see Tab. 20 to 23).
Tab. 20
Translation of original Operating Instructions, English, KNF 121446-121449 04/16 31
Page 32
Troubleshooting Mini Laboratory pumps N 816.18, N 838.18
Flow rate, pressure or vacuum too low
The pump does not achieve the output specified in the Technical data or the data sheet.
Cause
Fault remedy
After diaphragm and valve
plates/sealings have been
replaced
Check that the spacers have been replaced onto the
diaphragm screw thread.
Check head connection and hose connections for leaks.
Possibly carefully tighten the outer screws of the top plate
crosswise.
Pump is switched on, but does not run, the on/off-switch on the pump is not lit
Cause
Fault remedy
Pump is not connected with the
power source.
Connect pump to mains power.
No voltage in the power source
Check room fuse and switch on if necessary.
Fuse in the pump is defective.
Remove pump’s mains plug from the socket.
Pumps 816._K_.18: Fuses are located in the housing, and
can be accessed by removing the fan cover
Pumps 838._K_.18: Fuses are located in the housing, and
can be accessed by removing the terminal box plate on the
bottom of the pump.
Select and replace suitable fuse (see chapter 4).
Pump is switched on, but does not run, the on/off-switch on the pump is lit
Cause
Fault remedy
The thermal switch has opened
due to overheating
Remove pump´s mains plug from the socket.
Allow pump to cool.
Trace cause of over-heating and eliminate it.
Tab. 21
Tab. 22
Tab. 23
Fault cannot be rectified
If you are unable to determine any of the specified causes, send
the pump to KNF Customer Service (see last page for the address).
1. Flush the pump to free the pump head of dangerous or aggressive gases (see chapter 8.2.1).
2. Clean the pump (see chapter 8.2.2).
3. Send the pump, together with completed Health and Safety
Clearance and Decontamination Form (Chapter 12, page 36),
to KNF stating the nature of the transferred medium.
32 Translation of original Operating Instructions, English, KNF 121446-121449 04/16
Page 33
Mini Laboratory pumps N 816.18, N 838.18 Spare parts and accessories
Service Set for pump type:
Order-No.:
N 816.1.2 KN.18
056315
N 816.1.2 KN.45.18
056315
N 816.1.2 KT.18
056316
N 816.3 KT.45.18
056316
N 816.3 KN.18
056315
N 816.3 KN.45.18
056315
N 816.3 KT.18
056316
N 816.3 KT.45.18
056316
N 838.1.2 KN.18
111952
N 838.1.2 KN.45.18
111952
N 838.1.2 KT.18
111953
N 838.1.2 KT.45.18
111953
N 838.3 KN.18
111952
N 838.3 KN.45.18
111952
N 838.3 KT.18
111953
N 838.3 KT.45.18
111953
Pump range
Order-No. fuse
(1 piece)
N 816._K_.18, 230 V
027574
N 816._K_.18, 115 V
027575
N 816._K_.18, 100 V
027575
N 838._ K_.18, 230 V
025250
N 838._ K_.18, 115 V
020255
N 838._ K_.18, 100 V
027575
N 838._ K_.18, 220 V
025250
10. Spare parts and accessories
10.1. Spare parts
A Service Set contains all spare parts needed for one complete
service
2 diaphragms
4 valve plates/sealings
Tab. 24
Fuses
Each pump contains two fuses.
Tab. 25
Translation of original Operating Instructions, English, KNF 121446-121449 04/16 33
Page 34
Spare parts and accessories Mini Laboratory pumps N 816.18, N 838.18
Description
Order-No.:
Silencer
000345
Hose connector PVDF
014052
Fine-adjustment valve
056547
Description
Order-No.:
Silencer
007006
Hose connector PVDF
112004
Fine-adjustment valve
112432
10.2. Accessories
N 816 K_.18
Tab. 26
N 838._ K_.18
Tab. 27
34 Translation of original Operating Instructions, English, KNF 121446-121449 04/16
Page 35
Mini Laboratory pumps N 816.18, N 838.18 Returns
11. Returns
Pumps and systems used in laboratories and process-based
industries are exposed to a wide variety of conditions. This means
that the components contacting pumped media could become
contaminated by toxic, radioactive, or otherwise hazardous substances.
For this reason, customers who send any pumps or systems back
to KNF must submit a Health and safety clearance and decontamination form in order to avoid a hazardous situation for KNF employees. This Health and safety clearance and decontamination
form provides the following information, among other things:
physiological safety
whether medium-contacting parts have been cleaned
whether the equipment has been decontaminated
media that have been pumped or used
To ensure worker safety, work may not be started on pumps or
systems without a signed Health and safety clearance and decontamination form.
For optimal processing of a return, a copy of this declaration
should be sent in advance via e-mail, regular mail, or fax to KNF
Customer Service (refer to final page for address). In order to avoid
endangering employees who open the shipment's packaging,
despite any residual hazards, the original version of the Health and
safety clearance and decontamination form must accompany the
delivery receipt on the outside of the packing.
The template for the Health and safety clearance and decontamination form is included with these Operating Instructions and may
also be downloaded from the KNF website.
The customer must specify the device type(s) and serial number(s)
in the Health and safety clearance and decontamination form in
order to provide for the unambiguous assignment of the Declaration to the device that is sent to KNF.
In addition to the customer's declaration of physiological safety,
information about operating conditions and the customer's application are also of importance to ensure that the return shipment is
handled appropriately. Therefore, the Health and safety clearance
and decontamination form requests this information as well.
Translation of original Operating Instructions, English, KNF 121446-121449 04/16 35
Page 36
Health and safety clearance and decontamination form Mini Laboratory pumps N 816.18, N 838.18
KNF worldwide
Find your local KNF partner on www.knf.com
12. Health and safety clearance and decontami-
nation form
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