KNF N96 User manual
N96
TRANSLATION OF ORIGINAL OPERATING AND
INSTALLATION INSTRUCTION
ENGLISH
KNF 316836-316838 01/20 EN-US
OEM
Notice!
Before operating the pump and the accessories, read the operating and installation instructions and observe
the safety notices!
DIAPHRAGM PUMP
Index
1 About this document ......................................................... 3
2 Use ................................................................................... 5
3 Safety................................................................................ 6
4 Technical data .................................................................. 8
5 Design and function ........................................................ 11
6 Transport ........................................................................ 12
7 Installation and connection ............................................. 13
8 Operation ........................................................................ 22
9 Servicing ......................................................................... 25
10 Troubleshooting .............................................................. 30
11 Spare parts and accessories .......................................... 32
12 Returns ........................................................................... 33
KNF Neuberger GmbH
Alter Weg 3
79112 Freiburg
Germany
Tel. +49 (0)7664/5909-0
Fax. +49 (0)7664/5909-99
www.knf.com
Diaphragm pump N96 About this document
Translation of Original Operating and Installation Instruction, English, KNF 316836-316838 01/20 3
1 About this document
1.1 Using the operating and installation instructions
The operating and installation instructions are part of the pump.
àIn the event of uncertainties with regard to the content of the operating
and installation instructions, please contact the manufacturer (contact
data: see www.knf.com). Please have the type designation and serial
number of the pump ready.
àRead the operating and installation instructions before you commission
the pump.
àGive the operating and installation instructions to the next owner.
àKeep the operating and installation instructions within reach at all
times.
Project pumps For customer-specific project pumps (pump models that begin with "PJ" or
"PM"), there may be deviations from the operating and installation instruc-
tions.
àFor project pumps, also observe the agreed specifications.
1.2 Exclusion of liability
The manufacturer assumes no liability for damages and malfunctions re-
sulting from failure to observe the operating and installation instructions.
The manufacturer assumes no liability for damages and malfunctions re-
sulting from changes or modifications to the device and improper handling.
The manufacturer assumes no liability for damages and malfunctions re-
sulting from impermissible spare parts and accessories.
1.3 Symbols and markings
Warning notice
WARNING
A notice that warns you of danger is located here.
Possible consequences of a failure to observe the
warning notice are specified here. The signal
word, e.g., warning, indicates the danger level.
àMeasures for avoiding the danger and its
consequences are specified here.
Danger levels
Signal word Meaning Consequences if not
observed
DANGER warns of immediate
danger
Death or serious injury
or serious damage will
result.
WARNING warns of possible dan-
ger
Death or serious injury
or serious damage is
possible.
CAUTION warns of a possibly
dangerous situation
Minor injuries or dam-
age is possible.
Tab.1
About this document Diaphragm pump N96
4 Translation of Original Operating and Installation Instruction, English, KNF 316836-316838 01/20
Explanations of pictograms
Pictogram Meaning
General warning symbol
Warning of hot surface
Warning of electrical voltage
Warning of explosive materials
Warning of poisonous substances
Warning of hand injuries through crushing
Observe the operating instructions
Tab.3
Other notices and symbols
àAn activity to be carried out is specified here (a step).
1. The first step of an activity to be carried out is specified here.
Follow other sequentially numbered steps.
This symbol indicates important information.
Diaphragm pump N96 Use
Translation of Original Operating and Installation Instruction, English, KNF 316836-316838 01/20 5
2 Use
2.1 Proper use
The pumps are intended exclusively for transferring gases and vapors.
Responsibility of the owner
Operating parameters and
conditions
Only install and operate the pumps in accordance with the operating pa-
rameters and conditions described in Chapter 4 Technical data.
Only pumps that are fully assembled and in the condition as delivered may
be operated.
Make sure that the installation location is dry and that the pump is pro-
tected against rain, splash, gushing, and drip water as well as from other
contaminants.
Check the tightness of the connections between the pipes of the applica-
tion and the pump (or the connection of the pump) at regular intervals.
Leaky connections carry the risk of releasing dangerous gases and vapors
from the pump system.
Requirements for the transferred
medium
Before transferring a medium, check whether the medium can be trans-
ferred danger-free in the specific application.
Before using a medium, check the compatibility of the media-contacting
components (see 4 Technical data) with the medium.
Risk of dangerous gas mixtures during pump operation if diaphragm
breaks: Depending on the medium being transferred, breakage of the di-
aphragm can result in a dangerous mixture if the medium mixes with the
air in the compressor housing or the surroundings.
Only transfer gases that remain stable under the pressures and tempera-
tures that arise in the pump.
2.2 Improper use
The pumps are not allowed to be operated in explosive atmospheres.
The pumps are not suitable for delivering:
§Dusts
§Fluids
§Aerosols
§Biological and microbiological substances
§Fuel
§Explosive substances and flammable materials
§Fibers
§Oxidants
§Food
Pumps that can generate both a vacuum and overpressure must not be
used for the simultaneous generation of a vacuum and overpressure.
This function can be made possible on a project basis following consulta-
tion with KNF Customer Service.
No overpressure may be applied to the suction side of the pump.
This function can be made possible on a project basis following consulta-
tion with KNF Customer Service.
Safety Diaphragm pump N96
6 Translation of Original Operating and Installation Instruction, English, KNF 316836-316838 01/20
3 Safety
Observe the safety instructions in the Chapters 7 Installation and
Connection and 8.1 Operation.
The pumps are built in accordance with the generally recognized rules of
engineering and the occupational health and safety and accident preven-
tion regulations. Nevertheless, dangers can arise during their use that lead
to injuries to the user or third parties or to damage to the pump or other
property.
Only use the pumps if in technically perfect condition, in accordance with
their intended use, in a safety-conscious and danger-conscious manner
and in compliance with the operating and installation instructions.
The components that are to be connected to the pumps must be designed
according to the pneumatic data of the pumps.
When connecting the pumps to the electrical mains, observe the corre-
sponding safety rules.
Personnel Make sure that only trained and instructed personnel or qualified personnel
work on the pumps. This applies, in particular, to assembly, connection
and servicing work.
Make sure that the personnel have read and understood the operating and
installation instructions, especially the Chapter Safety.
Working in a safety conscious
manner
Observe the regulations on accident prevention and safety during all work
on the pumps and during operation.
Avoid contact with the heads and housing parts as the pump heats up dur-
ing operation.
When working on the pump, make certain that the pump is disconnected
from the mains and is de-energized.
Make certain that no dangers arise from flows when gas connections are
open, from the effects of noise or from hot, corrosive, dangerous and envi-
ronmentally hazardous gases.
Make sure that EMC-compliant installation of the pump is guaranteed at all
times and that no danger situation can arise as a result.
Handling of hazardous media Upon breakage of the diaphragm and/or leaks, the transferred medium
mixes with the air in the surroundings and/or in the pump housing. Make
sure that a dangerous situation cannot arise as a result.
When pumping hazardous media, observe the safety regulations for the
handling of these media.
Handling of combustible media Take heed that the pumps are not designed to be explosion-proof.
Make certain that the temperature of the medium is always sufficiently be-
low the ignition temperature of the medium so as to prevent ignition or ex-
plosion. This also applies for abnormal operating situations.
Bear in mind that the temperature of the medium increases when the
pump compresses the medium.
Therefore, make certain that the temperature of the medium also remains
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
Chapter 4 Technical data.
Make certain that the permissible ambient temperature (4 Technical data)
is not exceeded.
If applicable, also take into consideration external energy sources (e.g. ra-
diation sources) that could additionally heat the medium.
In case of doubt, contact KNF Customer Service.
Diaphragm pump N96 Safety
Translation of Original Operating and Installation Instruction, English, KNF 316836-316838 01/20 7
Environmental protection Store and dispose of all replacement parts in accordance with the environ-
mental regulations. Observe the respective national and international regu-
lations. This applies in particular to parts that are contaminated with toxic
substances.
EU/EC directives/standards With respect to the Machinery Directive 2006/42/EC, the pumps are partly
completed machinery and are, therefore, to be regarded as not ready for
use. Partly completed machinery may not be commissioned until it has
been determined that the machine into which the partly completed machin-
ery is to be installed complies with the provisions of the Machinery Direc-
tive 2006/42/EC. The following fundamental requirements of Annex I of Di-
rective 2006/42/EC (general principles) are applied and observed:
§General principles no. 1
As these partly completed machines are built-in devices, the mains con-
nections and equipment for disconnecting and switching off the partly com-
pleted machinery as well as overcurrent and overload protection gear must
be considered when mounting.
Furthermore, protection against contact with moving and hot parts, if
present, must be provided during installation.
The pumps comply with Directive 2011/65/EU.
The following harmonized standards are met:
§DIN EN 50581
§DIN EN 61000-6-2/3
Customer service and repairs The pumps are maintenance-free. KNF does, however, recommend peri-
odically inspecting the pumps for conspicuous changes in the noises and
vibrations.
Only have repairs to the pumps performed by the responsible KNF Cus-
tomer Service.
Housings with live components may only be opened by specialist person-
nel.
Use only original parts from KNF during servicing work.
Technical data Diaphragm pump N96
8 Translation of Original Operating and Installation Instruction, English, KNF 316836-316838 01/20
4 Technical data
Technical data
Pump materials
Assembly Material
KN
Material
KT
Pump head PPS PPS
Diaphragm EPDM PTFE-coated
Valves FKM FKM
Tab.5 Pump materials KN/KT variant
Pneumatic values
N96KNDC-B-M
Parameter Value
Max. permissible operating pressure
[bar rel*]
2.5
Ultimate vacuum [mbar abs.] <100
Flow rate at atm. pressure [l/min]** 8.5 ± 10%
Tab.7
*Bar rel related to 1013 hPa
**Liters in standard state (1013 hPa, 20°C)
N96KTDC-B-M
Parameter Value
Max. permissible operating pressure
[bar rel*]
2.5
Ultimate vacuum [mbar abs.] <130
Flow rate at atm. pressure [l/min]** 7.0 ± 10%
Tab.9
*Bar rel related to 1013 hPa
**Liters in standard state (1013 hPa, 20°C)
Pneumatic connections
Pump type Value Value
N96KNDC-B-M G1/8 NPT 1/8
N96KTDC-B-M G1/8 NPT 1/8
Tab.11
Diaphragm pump N96 Technical data
Translation of Original Operating and Installation Instruction, English, KNF 316836-316838 01/20 9
Electrical data
Parameter Value
Voltage [V] 24
Frequency [Hz] -
Power P1 [W] KN KT
23 19
Max. permissible mains voltage fluc-
tuations
± 10%
Motor protection class IP20
Rated current consumption [A] KN KT
1,05 0.9
Tab.13
The motor controller has a current limit of max. 2.5ARMS. In the
event of an error, the power of the motor is limited to prevent the
current limit from being exceeded.
Weight
Pump type Value [kg]
N96K_DC-B-M 0.6
Tab.15
Other parameters
Parameter Value
Permissible ambient temperature
[°C]
+ 5 to see Fig. 1
0 if non-condensing (frost-free)
Permissible media temperature [°C] See Fig. 2
Dimensions See Fig. 5, Chapter 7.1 Installing
the pump
Highest permissible relative air hu-
midity of the environment
80% for temperatures to 31°C, de-
creasing linearly to 50% at 40°C.
Maximum installation altitude [m
above sea level]
2000
Gas tightness* of the pump head
(leak rate)
Leak rate
< 6 x 10-3 mbar l/s**
Protection class of pump IP20
Starts against
- Vacuum
- Pressure
KN KT
100
2.5
130
2.5
Tab.17
** The gas tightness of the pump head is no longer ensured after the pump head is
opened or after replacing diaphragms and valve plates. A leak test can be used to
determine whether the original gas tightness is again achieved.
**Values apply for helium leak test
Technical data Diaphragm pump N96
10 Translation of Original Operating and Installation Instruction, English, KNF 316836-316838 01/20
Permissible ambient
temperature
Pressure in
mbar
Pressure in
bar
Fig.1 Permissible ambient temperature
Permissible media
temperature
Pressure in
bar
Pressure in
mbar
Fig.2 Permissible media temperature
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