KNF N026 EX Bedienungsanleitung
N026 EX
TRANSLATION OF ORIGINAL OPERATION AND
INSTALLATION INSTRUCTION
ENGLISH
KNF 059217 11/19 EN-US
ATEX
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.............................................................................. 11
4 Technical data ................................................................ 13
5 Design and function ........................................................ 15
6 Transport ........................................................................ 17
7 Installation and connection ............................................. 18
8 Operation ........................................................................ 23
9 Servicing ......................................................................... 26
10 Troubleshooting .............................................................. 38
11 Spare parts and accessories .......................................... 41
12 Returns ........................................................................... 42
13 Appendix......................................................................... 43
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 N026 EX About this document
Translation of Original Operation and Installation Instruction, english, KNF 059217 11/19 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.
Motor The operating and installation instructions apply for pumps without motor.
àAlso observe the operating instructions for the motor in the appendix.
1.2 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 are
possible.
CAUTION warns of a possibly
dangerous situation
Minor injuries or dam-
age are possible.
Tab.1
About this document Diaphragm pump N026 EX
4 Translation of Original Operation and Installation Instruction, english, KNF 059217 11/19
Explanations of pictograms
Pictogram Meaning
Warning of hand injuries through crushing
Warning of hot surface
Warning of electrical voltage
Warning of explosive materials
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 N026 EX Use
Translation of Original Operation and Installation Instruction, english, KNF 059217 11/19 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 and Chap-
ter 2.3 Use in potentially explosive areas.
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.
The pump is suitable for transferring potentially explosive atmospheres
and for operation in potentially explosive atmospheres.
The tightness of the connections between the pipes of the application and
the pump (or the connection of the pump) is to be checked at regular inter-
vals. 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.
Make certain that no risk of explosion arises even in extreme operating sit-
uations (temperature, pressure) and in the event of system breakdowns.
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 suitable for use below ground.
The pumps are not suitable for transferring:
§Dusts
§Liquids
§Aerosols
§Biological and microbiological substances
§Explosives
§Fibers
§Food
Pumps that can produce both vacuum as well as overpressure may not be
used to simultaneously produce vacuum and overpressure.
This function can be made possible on a project basis upon consultation
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 upon consultation
with KNF Customer Service.
Use Diaphragm pump N026 EX
6 Translation of Original Operation and Installation Instruction, english, KNF 059217 11/19
2.3 Use in potentially explosive areas
In potentially explosive areas (zones), only operate pumps of the appropri-
ate device category and temperature class.
The pumps have the following explosion protection designation:
Designation Description
Symbol for explosion-proof pumps
II Device group (See Chapter 2.4.1 Device groups)
2/2G Device category (See Chapter 2.4.2 Device cate-
gories for gas)
Ex Symbol indicates that the device complies with
one or more ignition protection types
H Symbol for ignition protection type (See Chapter
2.4.5 Ignition protection type)
II B + H2 Explosion groups (see Chapter 2.4.3 Explosion
groups)
T4 Temperature class (see Chapter 2.4.4 Tempera-
ture classes)
Gb Equipment protection level (See Chapter 2.4.6
Equipment protection level for gas)
Special operating conditions (See Chapter 2.4.7
Special operating conditions)
Tab.5
An ignition hazard assessment in accordance with standards DIN EN ISO
80079-36 and DIN EN ISO 80079-37 was performed for the pumps. The
protective goals were reached by applying ignition protection type con-
structional safety "c".
The explosion protection designation can also be found at the following lo-
cation:
§Type plate of the pump
Motor The pump motor must have at least the same explosion protection as the
pump.
Diaphragm pump N026 EX Use
Translation of Original Operation and Installation Instruction, english, KNF 059217 11/19 7
2.4 Explanations of the explosion protection designation
2.4.1 Device groups
Device group I Device group I applies for devices that are used in underground plants of
mines as well as their underground systems that could be endangered by
methane and/or combustible dusts.
Device group II Device group II applies for devices that are used in other areas that could
be endangered by an explosive atmosphere.
2.4.2 Device categories for gas
The device category describes the frequency and the duration of the oc-
currence of explosive atmospheres during operation.
Device cat-
egory
Description
1G Devices of this category are designed for use in areas in
which an explosive atmosphere consisting of a mixture of air
and gases, vapors or mists is present constantly or for long
periods of time or often.
1D Devices of this category are designed for use in areas in
which an explosive atmosphere consisting of a dust/air mix-
ture is present constantly or for long periods of time or often.
2G Devices of this category are designed for use in areas in
which it is to be expected that an explosive atmosphere con-
sisting of gases, vapors or mists forms occasionally.
2/2G Devices that extract from zone 1 and are designed for use in
areas in which it is to be expected that an explosive atmos-
phere consisting of gases, vapors or mists forms occasion-
ally.
2/-G Devices that extract from zone 1 but are not designed for in-
stallation in a potentially explosive atmosphere (zone).
2D Devices of this category are designed for use in areas in
which it is to be expected that an explosive atmosphere con-
sisting of a dust/air mixture forms occasionally.
3G Devices of this category are designed for uses in areas in
which it is to be expected that an explosive atmosphere re-
sulting from gases, vapors or mists occurs, though in all like-
lihood occurs only seldom and for a very short length of time.
3D Devices of this category are designed for uses in areas in
which it is to be expected that an explosive atmosphere re-
sulting from stirred-up dust occurs, though in all likelihood
occurs only seldom and for a very short length of time.
Tab.7
Use Diaphragm pump N026 EX
8 Translation of Original Operation and Installation Instruction, english, KNF 059217 11/19
2.4.3 Explosion groups
Combustible gases and vapors are classified according to explosion
groups (I, IIA, IIB and IIC) and temperature classes. The following table
shows the classification of the most common combustible gases and va-
pors.
T1 T2 T3 T4 T5 T6
I Methane – – – – –
IIA Acetone
Ethane
Ethyl ac-
etate
Ammonia
Ethyl chlo-
ride
Benzene
Acetic acid
Carbon
monoxide
Methane
Methanol
Methyl chlo-
ride
Naphthalene
Phenol
Propane
Toluene
i-amyl ac-
etate
n-butane
n-butyl alco-
hol
Cyclohex-
anone
1,2-
dichloroetha
ne
Acetic anhy-
dride
Gasoline
Diesel fuel
Jet fuel
Heating oils
n-hexane
Acetalde-
hyde
– –
IIB Town gas Ethylene
Ethyl alcohol
Hydrogen
sulfide
Ethyl ether – –
IIC Hydrogen Acetylene – – – Carbon
disulfide
Tab.9
The classification of gases and vapors into groups with respect to explo-
sion group and temperature class applies for the transferred medium as
well as for the pump surroundings.
Transferred medium The pump may only be used to transfer gases and vapors that belong to
the respective explosion group and corresponding temperature class (or
below) (see designation on the type plate) or that are not explosive and
combustible.
Environment of the pump The pump may only be operated in an environment that contains an at-
mosphere that belongs to the respective explosion group and correspond-
ing temperature class (or below) (see designation on the type plate) or that
is not explosive and not combustible.
Diaphragm pump N026 EX Use
Translation of Original Operation and Installation Instruction, english, KNF 059217 11/19 9
2.4.4 Temperature classes
Maximum surface temperature The maximum surface temperature is the highest temperature that is
reached under the most unfavorable conditions of a surface of the pump.
Ignition temperature The maximum surface temperature of the pump must always be lower
than the lowest ignition temperature of the gas or vapor/air mixture in
which it is used.
Temperature class The maximum surface temperature arises from the design the pump and is
specified as temperature class.
Temperature class Max. surface tempera-
ture [°C]
Ignition temperature
[°C]
T1 450 > 450
T2 300 > 300
T3 200 > 200
T4 135 > 135
T5 100 > 100
T6 85 > 85
Tab.11
2.4.5 Ignition protection type
Designation Description
h Constructional safety "c"
h Ignition source monitoring "b"
h Liquid immersion "k"
Tab.13
An ignition hazard assessment in accordance with standards DIN EN ISO
80079-36 and DIN EN ISO 80079-37 was performed for the pumps. The
protective goals were reached by applying ignition protection type con-
structional safety "c".
Use Diaphragm pump N026 EX
10 Translation of Original Operation and Installation Instruction, english, KNF 059217 11/19
2.4.6 Equipment protection level for gas
The equipment protection level describes the frequency and the duration
of the occurrence of explosive atmospheres in an area.
Equipment
protection
level
Description* Constructional
safety
Ga Devices with very high protection level
for use in potentially explosive areas.
With these devices, there is no risk of ig-
nition during normal operation or in the
event of foreseeable or infrequent faults/
malfunctions.
Very high
Gb Devices with high protection level for
use in potentially explosive areas in
which there is no risk of ignition during
normal operation or in the event of fore-
seeable or infrequent faults/malfunc-
tions.
High
Gc Device with increased protection level
for use in potentially explosive areas.
There is no risk of ignition during normal
operation. The devices have a number
of additional protection measures which
ensure that, in the event of commonly
foreseeable faults in the device, no dan-
ger of ignition exists.
Increased
Tab.15 *according to DIN EN ISO 80079-36
2.4.7 Special operating conditions
§The pumps may not be set up outdoors. Commissioning may only be
performed with suitable weather- and corrosion-protection paneling.
§The pumps are to be set up so that they are not exposed to any UV ra-
diation.
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