KNF NF5 User manual

KNF Flodos AG BA_NF5_NFB5_EN_01_172971.docx
Translated from the Original Operating and Installation Instructions Keep for future reference!
DIAPHRAGM LIQUID PUMP
NF 5, NFB 5
Operating and
Installation
Instructions
Read and observe these Oper-
ating and Installation Instruc-
tions!
An additional letter prefixing
the NF model code is a coun-
try-
specific designation, with no
technical relevance.
Contents Page
1. About this document ................................................................. 2
2. Use ........................................................................................... 3
3. Safety ....................................................................................... 4
4. Technical data .......................................................................... 6
5. Assembly and function ............................................................. 9
6. Installation and connection ..................................................... 10
7. Operation ................................................................................ 15
8. Servicing ................................................................................. 19
9. Troubleshooting ...................................................................... 21
10. Accessories ............................................................................ 23
11. Decontamination declaration .................................................. 24
KNF Flodos AG
Wassermatte 2
6210 Sursee, Switzerland
Tel [phone]
Fax [phone]
www.knf-flodos.ch
[e-mail]
NF 5 KP DC
-
M 12V
DC
-
M / DCB / DCB
-
4
KP / KT /
TT [Ch.
4
]
NF / NFB
Supply
voltage [Ch.
4
]
5
-
/ PMLxxxx /
PLxxxx [Ch.
1
]

Diaphragm liquid pump NF 5, NFB 5 About this document
KNF Flodos AG BA_NF5_NFB5_EN_01_172971.docx
Translated from the Original Operating and Installation Instructions 2
1. About this document
1.1. Use of the Operating and Installation Instruc-
tions
The Operating and Installation Instructions are part of the pump.
 Forward the Operating and Installation Instructions to any sub-
sequent owners of the pump.
Customer-specific project pumps (pump models which begin with
"PL" or "PML") may differ from the Operating and Installation In-
structions.
 In the case of project pumps, take note of any additionally
agreed specifications.
1.2. Symbols and markings
Warning
WARNING
This symbol indicates a potential danger.
It also indicates the possible consequences of failure
to observe the warning. The signal word (e.g. "Warn-
ing") indicates the level of danger.

Here you will see actions for avoiding the danger
and potential consequences.
Danger levels
Signal word Meaning Consequences if not observed
DANGER warns of immedi-
ate danger
Consequences are death or se-
rious injury and/or serious prop-
erty damage.
WARNING warns of poten-
tial danger
Death or serious injury and/or
serious damage to property are
possible.
CAUTION warns of a poten-
tially dangerous
situation
Minor injury or damage to prop-
erty are possible.
Tab. 1
Other information and symbols
 This indicates a required activity (step).
This indicates the first step of a required activity. Additional
consecutively numbered steps follow.
This symbol indicates important information.
Project pumps

Diaphragm liquid pump NF 5, NFB 5 Use
KNF Flodos AG BA_NF5_NFB5_EN_01_172971.docx
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2. Use
2.1. Intended use
The pumps are intended for transferring and metering liquids.
Owner's responsibility
Only install and operate the pumps under the operating parameters
and conditions described in Chapter 4 About this document, Tech-
nical data.
Only completely installed pumps may be taken into service.
Before transferring or metering a medium, check whether the me-
dium can be transferred danger-free in the specific application
case.
Before using a medium, check the compatibility of the materials of
the pump head, pump housing, diaphragm and valves with the me-
dium.
The temperature of the medium must lie within the permissible
temperature range (see Chapter 4).
The transferred medium should not contain particles as these can
prevent the pump from working correctly. If this cannot be guaran-
teed, a filter < 50 m with sufficiently large filter area must be used
upstream of the pump.
 Filters may be ordered as accessories, see Spare Parts and
Accessories (Chapter 10).
2.2. Improper use
DANGER
The pumps must not be operated in an explosive
atmosphere.
Please contact your local KNF partner for special designs that
are not included in the technical specification (www.knf.com).
Operating parameters and
conditions
Requirements for
transferred medium

Diaphragm liquid pump NF 5, NFB 5 Safety
KNF Flodos AG BA_NF5_NFB5_EN_01_172971.docx
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3. Safety
Observe the safety precautions in Chapter s
6. Installation and connectionand 7.Operation.
The pumps are built according to the generally recognised rules of
technology and in accordance with the pertinent occupational
safety and accident prevention regulations. Nevertheless, dangers
may occur during their use which may 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 and Installation 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 all personnel have read and understood the Oper-
ating and Installation Instructions, and in particular the "Safety"
Chapter .
Always ensure adherence to all pertinent accident prevention and
safety regulations when working on and operating the pump.
When transferring dangerous media, observe the safety regula-
tions for handling such media.
Always ensure adherence to all information stickers on the pumps,
such as flow direction arrows and type plates, and keep stickers in
legible condition.
All replacement parts should be properly stored and disposed of in
accordance with the applicable environmental protection regula-
tions. Ensure adherence to the pertinent national and international
regulations. This especially applies to parts contaminated with toxic
substances.
Dispose of all packaging in an environmentally-appropriate
manner. The packaging materials are recyclable.
Dispose of end-of-life equipment in an environmentally
friendly manner. Use appropriate waste collection systems
for the disposal of end-of-life equipment. Used pumps con-
tain valuable recyclable materials.
Personnel
Working in a
safety-conscious manner
Handling dangerous media
Notes
Environmental protection
Disposal

Diaphragm liquid pump NF 5, NFB 5 Safety
KNF Flodos AG BA_NF5_NFB5_EN_01_172971.docx
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The pumps comply with the fundamental requirements of Directive
2011/65/EU (RoHS2).
The pumps comply with the safety requirements regarding electro-
magnetic compatibility in Directive 2004/108/EC.
For the purposes of the Machinery Directive 2006/42/EC, pumps
are “partly completed machinery", and are therefore to be regarded
as not ready for use. Partly completed machinery may not be com-
missioned until such time as it has been determined that the ma-
chine in which the partly completed machinery is to be assembled
conforms to the provisions of the Machinery Directive 2006/42/EC.
The essential requirements of Annex I of Directive 2006/42/EC
(general principles) are applied and observed.
The following harmonised standards are met:
NF 5 DC-M
 EN 55022
 EN 55011
NF 5 DCB / DCB-4
 EN 61000-6-2
 EN 61000-6-3 (incl. EN 55022 / EN 55011)
NFB 5 DCB / DCB-4
 EN 61000-6-2
 EN 61000-6-3 (incl. EN 55022 / EN 55011)
All repairs to the pump(s) must be carried out by the relevant KNF
customer service team.
Only use genuine parts from KNF for servicing work.
EU directives/standards
Customer service and repairs

Diaphragm liquid pump NF 5, NFB 5 Technical data
KNF Flodos AG BA_NF5_NFB5_EN_01_172971.docx
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4. Technical data
Pump materials
The pump type KP stands for:
Assembly Material1)
Pump head* PP
Anchor valves / seals EPDM
Diaphragm NF5 EPDM
Diaphragm NFB5 PTFE-coated
Tab. 2 1) according to DIN ISO 1629 and 1043.1
The pump type KT stands for:
Assembly Material1)
Pump head* PP
Anchor valves / seals FFKM
Diaphragm PTFE-coated
Tab. 3 1) according to DIN ISO 1629 and 1043.1
The pump type TT stands for:
Assembly Material1)
Pump head* PVDF
Anchor valves / seals FFKM
Diaphragm PTFE-coated
Tab. 4 1) according to DIN ISO 1629 and 1043.1
* The pump head (Fig. 1) comprises an intermediate plate and a connect-
ing plate.
Hydraulic ratings NF 5
Parameter Value
Flow rate DC-M [ml/min] 1), 2)  70
Flow rate DCB-4 [ml/min] 1), 2)  5-40
Flow rate DCB [ml/min] 1), 2)  40
Permissible pressure [bar g] 1
Suction head KP [mWG] 3
Suction head KT, TT [mWG] 2.5
Tab. 5

Diaphragm liquid pump NF 5, NFB 5 Technical data
KNF Flodos AG BA_NF5_NFB5_EN_01_172971.docx
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Hydraulic ratings NFB 5
Parameter Value
Flow rate DCB-4 [ml/min] 1), 2) 2x  5-40
Flow rate DCB [ml/min] 1), 2) 2x 40
Permissible pressure [bar g] 1
Permissible pressure (with restricted oper-
ating time) [bar g]
4
Suction head [mWG] 3
Tab. 6
1) Measured with water under KNF standard conditions, against atmos-
pheric pressure. Pump head material: KP
2) Flow rates may vary from the values shown, depending on fluid viscos-
ity, ambient temperature, pump head material and the hoses / hose con-
nectors used.
Hydraulic connections NF 5
Parameter Value
Hose barb OD (mm) 3
Recommended hose size ID [mm] 3
Tab. 7
Hydraulic connections NFB 5
Parameter Value
Hose barb OD (mm) 3
Recommended hose size ID [mm] 3
Tab. 8
Specifications NF 5 DC-M
Motor voltage 12V 24V
Power consumption [W] 1.44 1.44
Max. I load [A] 0.12 0.06
Max. permissible current consumption [A] 0.17 0.09
Lead size [-] AWG22
Protection class [-] IP30
Weight1) [g] 56
Tab. 9
Specifications NF 5 DCB / DCB-4
Motor options DCB-4 DCB 12V DCB 24V
Supply voltage
[V] 10…26.4 12 24
Power con-
sumption [W] 1.1 1.0 1.2
I loadmax. [A] 0.04…0.09 0.08 0.05
Lead size [-] AWG28
Protection class IP40
Weight 1) [g] 48
Tab. 10

Diaphragm liquid pump NF 5, NFB 5 Technical data
KNF Flodos AG BA_NF5_NFB5_EN_01_172971.docx
Translated from the Original Operating and Installation Instructions 8
In the case of type NF 5 DCB-4 the supply voltage is not de-
signed for operation with pulse-width modulated voltages
(PWM).
However, a PWM signal (frequency 500Hz or higher) can be
used to control the control voltage.
Electrostatic sensitive components (ESD)
1) The weight may differ slightly from the stated value, depending on the
version.
Specifications NFB 5 DCB / DCB-4
Motor options DCB-4 DCB 12V DCB 24V
Supply voltage
[V]
10…26.4 12 24
Power con-
sumption [W] 2.1 1.6 1.9
I loadmax. [A] 0.08…0.19 0.13 0.08
Lead size [-] AWG28
Protection
class
IP40
Weight 1) [g] 75
Tab. 11
1) The weight may differ slightly from the stated value, depending on the
version.
In the case of type NFB 5 DCB-4 the supply voltage is not de-
signed for operation with pulse-width modulated voltages
(PWM).
However, a PWM signal (frequency 500Hz or higher) can be
used to control the control voltage.
Electrostatic sensitive components (ESD)
Other parameters
Parameter Value
Permissible
ambient temperature range (°C)
+ 5 to + 40
Permissible media temperature range (°C) + 5 to + 80
Permissible kinematic viscosity of medium
[cSt]
≤ 150
Tab. 12

Diaphragm liquid pump NF 5, NFB 5 Assembly and function
KNF Flodos AG BA_NF5_NFB5_EN_01_172971.docx
Translated from the Original Operating and Installation Instructions 9
5. Assembly and function
Assembly
1 Outlet
2 Inlet
3 Connecting plate
4 Drive
5 Connecting leads
6 Head plate
7 Intermediate plate
Fig. 1: diaphragm liquid pump NF 5
1 Outlet valve
2 Inlet valve
3 Working chamber
4 Diaphragm
5 Eccentric
6 Connecting rod
7 Pump drive
Fig. 2: Pump assembly
diaphragm liquid pumps are based on reciprocating displacement
pump technology. The elastic diaphragm (4) is moved up and
down by the eccentric (5) and the connecting rod (6). In the down-
ward stroke it aspirates the medium to be transferred via the inlet
valve (2). In the upward stroke the diaphragm pushes the medium
out of the pump head via the outlet valve (1). The diaphragm her-
metically seals off the working chamber (3) from the pump drive
(7).
NFB 5 Version (double-headed pump, see Fig. 3)
This pump type has two NF5 pump heads that can be operated individu-
ally or or in parallel connection (see Chapter 6.3.2).
Fig. 3: NFB 5
(double-headed pump)

Diaphragm liquid pump NF 5, NFB 5 Installation and connection
KNF Flodos AG BA_NF5_NFB5_EN_01_172971.docx
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6. Installation and connection
Only install the pumps under the operating parameters and condi-
tions 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 ambient temperature.
 Mounting dimensions (see Fig. 4 to Fig. )
Fig. 4: Mounting dimensions NF 5 DC-M
Fig. 5: Mounting dimensions NF 5 DCB
Mounting dimensions

Diaphragm liquid pump NF 5, NFB 5 Installation and connection
KNF Flodos AG BA_NF5_NFB5_EN_01_172971.docx
Translated from the Original Operating and Installation Instructions 11
Fig. 6: Mounting dimensions NF 5 DCB-4
Fig. 7: Mounting dimensions NFB 5 DCB
Fig. 8: Mounting dimensions NFB 5 DCB-4
 Make sure that the installation location is dry and the pump is
protected against water in the form of rain, spray, splashes and
drips.
 Protect the pump against dust.
 Protect the pump against vibration and impact.
Installation location

Diaphragm liquid pump NF 5, NFB 5 Installation and connection
KNF Flodos AG BA_NF5_NFB5_EN_01_172971.docx
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 Generally speaking, the pump can be installed in any position.
For maximum accuracy and rapid venting of one-headed
pumps, please install as shown in the illustration (Fig. ).
Installation position
Fig. 9: Optimum installation
position for one-headed pumps:
horizontal

Diaphragm liquid pump NF 5, NFB 5 Installation and connection
KNF Flodos AG BA_NF5_NFB5_EN_01_172971.docx
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6.2. Electrical connection
 Only have the pump connected by an authorized specialist.
 Only have the pump connected when the power supply is dis-
connected.
 When connecting the device to a power source, the relevant
norms, directives, regulations and technical standards must be
observed.
Connecting the pump
Make sure that the power supply data match the data on the
motor's type plate. The current consumption can be found on
the type plate.
Connect the motor cables. For electrical data see Chapter 4.
Note the proper polarity.
For DC motors:
red motor cable: +
black motor cable: -
6.3. Hydraulic connection
 Only connect components to the pump that are designed to
handle the hydraulic data of the pump (see
Chapter 4,Technical data).
 Only use hoses that are suitable for the maximum permissible
operating pressure of the pump (see Chapter 4).
 Only use hoses that are sufficiently chemically resistant to the
liquids being transferred.
6.3.1. Connecting the pump
Arrows on the pump head indicate the flow direction.
Remove the protective caps.
Connect the suction and pressure lines.
Keep the suction line as short as possible in order to keep the
priming process as brief as possible.
If the pump is used to build up pressure, make sure that all
transition joints between hose and pump are secure in order to
ensure that the hoses cannot come off.
Check that the hoses and transition joints are fitted correctly
and securely.
Check that the system is leak-tight.
Connected
components
Hoses

Diaphragm liquid pump NF 5, NFB 5 Installation and connection
KNF Flodos AG BA_NF5_NFB5_EN_01_172971.docx
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6.3.2. NFB 5 hose configuration
A double-headed pump is normally selected to reduce the
pressure surges caused by the alternation between suction
and exhaust in a diaphragm pump. In order to achieve this ef-
fect, in addition to the pump configuration it is important to con-
figure the hoses correctly.
For low pulsation (pressure surges) in NFB pumps:
 Configure pump head hoses in parallel (see Fig. ).
 Keep hoses between pump and junction as short as possible.
 Cause as little narrowing as possible with connection ele-
ments. Recommendation: Min. inside diameter 1.5mm.
Please contact your local KNF partner for further information
(www.knf.com).
Please contact your local KNF partner for further information
(www.knf.com).
Fig. 11: NFB hose configuration for low pulsation
Fig. 10: Hose connection options
for NFB versions
Fig. 5: No series connection in the
case of NFB versions
CAUTION
Series connection damages pump
If the two heads in the NFB versions are connected
in series, the pump will be damaged, and may leak.

Diaphragm liquid pump NF 5, NFB 5 Operation
KNF Flodos AG BA_NF5_NFB5_EN_01_172971.docx
Translated from the Original Operating and Installation Instructions 15
7. Operation
 Operate the pumps only under the operating parameters and
conditions described in Chapter 4,Technical data.
 Make sure that the pumps are being used properly (see Chap-
ter 2.1).
 Avoid improper use of the pumps (see Chapter 2.2).
 Observe the safety precautions (see Chapter 3).
 The pumps are components that are intended to be incorpo-
rated into another machine. Before putting them into service it
must be established that the machinery or systems in which
they are installed meet the relevant regulations.
CAUTION
Risk of burning
The drive heats up.
 Avoid contact with the pump drive.
 Avoid contact with flammable materials.
Excessive pressure and the inherent dangers thereof can be
prevented by placing a bypass line with a pressure relief valve
between the pressure and suction side of the pump. Please
contact your local KNF partner for further information
(www.knf.com).
CAUTION
Risk of burns when transferring hot media
 Do not touch the pump or the media transfer
system.
 Avoid contact with flammable materials.
 If the pump stops running, restore the system to normal atmos-
pheric pressure.
For pumps with thermal switch or electronic overload protection:
WARNING
Risk of physical injury and damage to the pump
due to automatic start
If the pump overheats and pump operation is
stopped by the thermal switch / electronics, the
pumps will restart automatically as soon as they have
had time to cool down.
 Take steps to ensure that this cannot produce a
hazardous situation.
Pump standstill

Diaphragm liquid pump NF 5, NFB 5 Operation
KNF Flodos AG BA_NF5_NFB5_EN_01_172971.docx
Translated from the Original Operating and Installation Instructions 16
Switching the pumps on and off
The motor speed of the pump, and thus the flow rate, is adjustable
and can also be regulated to some extent.
For more details, see Chapter 4, Technical data
Duty cycle / short cycle operation
KNF pumps are designed for continuous operation.
Short start and stop cycles may adversely affect the service life of
the brushed motors.
If the pump is operated with short cycles in your application,
please contact your local KNF partner for further information
(www.knf.com.)
Switching on the pump
 In order to ensure that the pump starts every time, make sure
that counterpressure is reduced to an acceptable level before
start-up. This should also be done during operation after a brief
power cut. Please contact your local KNF partner for further in-
formation (www.knf.com).
Switching off the pump
 KNF recommends: If transferring aggressive liquids, the pump
should be flushed thoroughly prior to switch off (see Chap-
ter 8.2.1), as this will help to lengthen the service life of the dia-
phragm.
 Restore the system to normal atmospheric pressure (release
hydraulic pressure in pump).
Setting and regulating motor
speed
Short cycle operation
CAUTION
Overpressure on the suction side causes me-
dium to flow through the switched-off pump
 Take steps to ensure that this cannot produce a
hazardous situation.

Diaphragm liquid pump NF 5, NFB 5 Operation
KNF Flodos AG BA_NF5_NFB5_EN_01_172971.docx
Translated from the Original Operating and Installation Instructions 17
Flow rate NF 5
Fig. 13: Flow rate of pump NF 5 DC-M
Fig. 14: Flow rate of pump NF 5 DCB and NF 5 DCB-4
Fig. 15: Flow rate of pump NF 5 DCB-4 depending on control voltage

Diaphragm liquid pump NF 5, NFB 5 Operation
KNF Flodos AG BA_NF5_NFB5_EN_01_172971.docx
Translated from the Original Operating and Installation Instructions 18
Flow rate NFB 5
Fig. 16: Flow rate of pump NFB 5 DCB and NFB 5 DCB-4 (per pump
head)
Fig. 17: Flow rate of pump NFB 5 DCB-4 (per pump head) depending on
control voltage

Diaphragm liquid pump NF 5, NFB 5 Servicing
KNF Flodos AG BA_NF5_NFB5_EN_01_172971.docx
Translated from the Original Operating and Installation Instructions 19
8. Servicing
8.1. Servicing schedule
Component Servicing interval
Pump - Regular inspection for external
damage or leaks
Pump head - Clean if the flow rate decreases, the
pump does not work or no vacuum
is created (Chapter 8.2)
Diaphragm, anchor
valves and seals
- Change as soon as pumping capac-
ity decreases, preferably sooner
Tab. 13
8.2. Cleaning and dismantling
WARNING
Health hazard due to dangerous
substances in the pump
Depending on the medium transferred, caustic burns
or poisoning are possible.
 Wear protective clothing if necessary, e.g. pro-
tective gloves.
 Flush the pump with a neutral liquid and pump
empty.
 With NFB pumps, make sure that both pump
heads are flushed.
Please contact your local KNF partner for further information
(www.knf.com).
With NFB pumps the necessary steps are repeated for the sec-
ond pump head.
8.2.1. Flushing the pump
 If transferring aggressive media, KNF recommends flushing
the pump with a neutral fluid under atmospheric conditions for
a few minutes before switching off, to extend the service life of
valves and diaphragm.
8.2.2. Preparations for disassembly
Flush the pump with a suitable neutralising liquid, and make
sure that no dangerous substances are left in the pump.
Pump empty.
Separate electrical connections.
Disconnect hoses from pump head.
Qty Tools
1 Torx screwdriver IP6
Tab. 14
Information on procedure
Tools

Diaphragm liquid pump NF 5, NFB 5 Servicing
KNF Flodos AG BA_NF5_NFB5_EN_01_172971.docx
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8.2.3. Disassembling the pump head
Loosen the four head screws (1) and remove the entire head.
Remove both anchor valves (4) from the intermediate plate (6)
and the connecting plate (3).
Remove the two anchor valve seals (5) from the intermediate
plate (6).
Undo the diaphragm (7). Remove the washers and make sure
that no washers (8) fall into the pump housing.
We recommend replacing the diaphragm (7).
8.2.4. Clean or replace parts
Clean the anchor valves (4), the anchor valve seals (5) and the
diaphragm (7) with a cloth and then blow off with compressed
air or replace.
Blow off the intermediate plate (6), connecting plate (3) and
head plate (2) with compressed air.
8.2.5. Assembling the pump head
Screw diaphragm (7) with washer (8) into connecting rod and
tighten firmly. Make sure that no washers (8) fall into the pump
housing.
Insert the seals (5) in the connecting plate (3).
Insert the anchor valves (4) in the intermediate plate (6) and
the connecting plate (3).
Place the connecting plate (3) on top of the intermediate plate
(6).
A pin and hole system prevents incorrect assembly.
Place the head plate (2) on top of the connecting plate (3)
A pin and hole system prevents incorrect assembly.
Insert the four head screws (1) into the through holes of the
pump head.
Place the pump head on top of the pump housing and make
sure that the flow direction of the pump head (see directional
arrow on the head plate (2)) is the same as before.
Alternately tighten the four head screws (1).
Reconnect the hoses to the pump head.
CAUTION
Escaping liquid
After assembly the pump may not be leak-tight due
to incorrect assembly, damaged or soiled seal faces,
or other reasons.
 Run pump for several minutes with a harmless
liquid at maximum operating pressure.
 Check that pump is leak-tight.
Fig. 18
1 Head screws
2 Head plate
3 Connecting plate
4 Anchor valves
5 Seals
6 Intermediate plate
7 Diaphragm
8 Washer