KNF NF 300 User manual

KNF Flodos BA_NF300_EN_08_068697.docx
Translated from the Original Operating and Installation Instructions Keep for future reference!
DIAPHRAGM LIQUID PUMP
NF 300, NF 1.300
Operating and
Installation
Instructions
Read and observe these oper-
ating and installation instruc-
tions!
An additional letter prefixing the
NF model code is a country-
specific designation and has no
technical relevance
Contents Page
1. About this document................................................................. 2
2. Use........................................................................................... 3
3. Safety ....................................................................................... 5
4. Technical data.......................................................................... 7
5. Assembly and function........................................................... 10
6. Installation and connection..................................................... 11
7. Operation................................................................................ 17
8. Servicing................................................................................. 20
9. Troubleshooting...................................................................... 24
10. Spare parts and accessories.................................................. 26
11. Return of the pump................................................................. 27
KNF Flodos AG
Wassermatte 2
6210 Sursee, Switzerland
Tel. [phone]
Fax [phone]
www.knf.com
[email protected]
NF 300 KP .51 .27 DC 12V
DC / DCB
.51 / - [Ch. 2]
KP / KT / TT / FT [Ch. 4]
NF / UNF / JNF
Supply voltage [Ch. 4]
300 / 1.300
- / PMLxxxx / PLxxxx [Ch. 1]
0.27 / - [Ch. 5]

Diaphragm liquid pump NF 300 About this document
KNF Flodos BA_NF300_EN_08_068697.docx
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1. About this document
1.1. Use of the operating and installation instruc-
tions
The operating and installation instructions are part of the pump.
➔Pass on the operating and installation instructions to the next
owner.
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 (i.e. "Warn-
ing") indicates the level of danger.
➔This specifies measures for avoiding the danger
and the consequences of failure to implement
these measures.
Danger levels
Signal word
Meaning
Consequences if not observed
DANGER
warns of immedi-
ate danger
Death or serious injuries and/or
serious material damage are the
consequence.
WARNING
warns of possible
danger
Death or serious injuries and/or
serious material damage are
possible.
CAUTION
warns of a poten-
tially dangerous
situation
Minor injuries or material dam-
age are possible.
Tab. 1
Other information and symbols
➔This indicates an activity (step) that needs to be carried out.
This indicates the first step of an activity to be carried out. Any
additional steps required are consecutively numbered.
This symbol refers to important information.
Project pumps

Diaphragm liquid pump NF 300 Use
KNF Flodos BA_NF300_EN_08_068697.docx
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2. Use
2.1. Proper 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, Technical data.
The pumps may be operated only when fully assembled.
Before transferring or metering a medium, check that it can be
transferred without risk 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
medium.
The temperature of the medium must lie within the permissible
temperature range (see Chapter 4).
The media should not contain particles as these can prevent the
pump from working correctly. If this cannot be guaranteed, a filter
< 100 m with a sufficiently large filter area must be used upstream
of the pump.
The .51 versions of our diaphragm liquid pump range have been
certified by NSF according to the standard NSF/ANSI 169 and are
therefore suitable for use with foodstuffs without any restrictions.
All materials used have been checked through a series of toxico-
logical tests. In order to ensure that the food grade quality is main-
tained, NSF will carry out a yearly audit checking our certified
products.
Only the pumps marked with ".51" are NSF-certified and contain a
defined material combination that also has a FDA certificate of
conformity.
NSF: National Sanitary Foundation
FDA: Food and Drug Administration
ANSI: American National Standard Institute
* Pumps with other customer-specific certified material combinations are
available on request.
Operating parameters and
conditions
Requirements for
transferred medium
.51* version –version with food
grade approval

Diaphragm liquid pump NF 300 Use
KNF Flodos BA_NF300_EN_08_068697.docx
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➔All certified diaphragm liquid pumps are clearly marked with
“.51” in the type designation along with the NSF-logo on the
type plate. If either or both of these markings are missing, the
pump is not certified.
➔Because the cleaning requirements of the diaphragm liquid
pumps depend on the application, KNF is unable to guarantee
cleaning options. The responsibility for cleaning the pump(s)
therefore lies with the user. While the NSF/ANSI 169 standard
regulates OEM products, it does not define cleaning methods
for specific OEM products.
➔All parts in contact with the medium can be replaced as spare
parts without losing the certification. Component parts cannot
be traded as certified parts. When replacing parts/assemblies
only use original KNF parts.
2.2. Improper use
The pumps may not be operated in an explosive atmosphere.
For special modifications outside the standard technical specifica-
tions, please contact a KNF pump specialist.

Diaphragm liquid pump NF 300 Safety
KNF Flodos BA_NF300_EN_08_068697.docx
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3. Safety
Note the safety precautions in Chapters 6. Installation and
connection, and 7. Operation.
The pumps are built according to the generally recognized rules of
technology and in accordance with the pertinent 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 in perfect working order and in accordance
with their intended use. Always ensure adherence to the operating
and installation instructions and work in a safety-conscious man-
ner.
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 operat-
ing 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.
Always observe the safety regulations when handling dangerous
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.
Personnel
Working in a
safety-conscious manner
Handling dangerous media
Notes
Environmental protection

Diaphragm liquid pump NF 300 Safety
KNF Flodos BA_NF300_EN_08_068697.docx
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The pumps are in accordance with the requirements of the guide-
lines 2011/65/EU (ROHS2)
As defined in the Machinery Directive 2006/42/EC, pumps are
partly completed machines and not ready-for-use, the overall
equipment must be made to fully conform with the requirements of
the Directive before being brought into service. Always ensure
implementation and enforcement of the basic requirements of the
Machinery Directive 2006/42/EC according to Appendix I (General
Principles).
The following harmonised standards are met:
NF 300 DC / NF 1.300 DC
▪EN 55022
▪EN 55011
NF 300 DCB / NF 1.300 DCB
▪EN 55014 - 1
▪EN 61000 - 6 - 1
All repairs to the pump(s) must be carried out by the relevant KNF
Customer Service team.
Only use KNF original parts for all maintenance work.
EU directives/standards
Customer service and
repairs

Diaphragm liquid pump NF 300 Technical data
KNF Flodos BA_NF300_EN_08_068697.docx
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4. Technical data
Pump materials
The pump type KP / KP.51 stands for:
Assembly
Material1)
Pump head *
PP
Valve plate
EPDM
Diaphragm
PTFE-coated
Resonating diaphragm
PTFE
Diaphragm. 27
EPDM
Tab. 2 1) according to DIN ISO 1629 and 1043.1
The pump type KT stands for:
Assembly
Material1)
Pump head *
PP
Valve plate
FFPM
Diaphragm
PTFE-coated
Resonating diaphragm
PTFE
Diaphragm. 27
FFPM / FPM
Tab. 3 1) according to DIN ISO 1629 and 1043.1
The pump type TT stands for:
Assembly
Material1)
Pump head *
PVDF
Valve plate
FFPM
Diaphragm
PTFE-coated
Resonating diaphragm
PTFE
Diaphragm. 27
FFPM / FPM
Tab. 4 1) according to DIN ISO 1629 and 1043.1
The pump type FT stands for:
Assembly
Material1)
Pump head *
PTFE
Valve plate
FFPM
Diaphragm
PTFE-coated
Resonating diaphragm
PTFE
Tab. 5 1) according to DIN ISO 1629 and 1043.1
* The pump head (Fig. 1) comprises a connecting plate and an intermedi-
ate plate

Diaphragm liquid pump NF 300 Technical data
KNF Flodos BA_NF300_EN_08_068697.docx
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Hydraulic ratings
Parameter
Value
Flow rate [l/min] 1), 2)
3.0
Max. permissible pressure NF 300 [bar g]
1
Max. permissible pressure NF 1,300 [bar
g]
6
Suction head [mWG]
3
Tab. 6
1) Measured with water at 20°C / at atmospheric pressure
2) Flow rates may vary from the values shown, depending on fluid viscosi-
ty, pump head material and the hoses / hose connectors used.
Hydraulic connections
Parameter
Value
NF 300 / NF 1.300
G 3/8"
UNF 300 / UNF 1.300
NPT 3/8"
Recommended hose size ID [mm]
12
Tab. 7
Specifications NF 300 DC
Motor voltage
12V/24V
Power consumption [W]
20 / 20
Max. current at max. load [A]
1.6 / 0.8
Max. motor current [A]
3.4 / 1.5
Protection class [-]
IP 50
Weight1) [g]
1000
Tab. 9
Specifications NF 300 DCB
Motor voltage
12V/24V
Power consumption [W]
35 / 35
Max. current at max. load [A]
2.1 / 1.19
Max. motor current [A]
2.5 / 2
Protection class [-]
IP 54
Weight1) [g]
1000
Tab. 10
Specifications NF 1.300 DC
Motor voltage
12V/24V
Power consumption [W]
34 / 34
Max. current at max. load [A]
2.8 / 1.4
Max. motor current [A]
3.4 / 1.5
Protection class [-]
IP 50
Weight1) [g]
1000
Tab. 12

Diaphragm liquid pump NF 300 Technical data
KNF Flodos BA_NF300_EN_08_068697.docx
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Specifications NF 1.300 DCB
Motor voltage
12V/24V
Power consumption [W]
35 / 35
Max. current at max. load [A]
2.5 / 1.66
Max. motor current [A]
2.5 / 2
Protection class [-]
IP 54
Weight1) [g]
1000
Tab. 13
1) The weight may differ slightly from the stated value, depending on the
version.
Electrostatic sensitive components (ESD)
Various parameters
Parameter
Value
Permissible ambient temperature
range [°C]
+ 5 to + 40
Permissible media temperature [°C]
+ 5 to + 80
Permissible kinematic viscosity of the
media [cSt]
≤ 150
Tab. 14

Diaphragm liquid pump NF 300 Assembly and function
KNF Flodos BA_NF300_EN_08_068697.docx
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5. Assembly and function
Assembly
1Outlet
2Inlet
3Connecting plate
4 Motor
5 Leads
6 Head plate
7 Intermediate plate
3
4
5
2
16
7
Fig. 1: Diaphragm liquid pump NF 300
1Exhaust valve
2Inlet valve
3Working chamber
4Diaphragm
5Eccentric
6Connecting rod
7Pump drive
Fig. 2: Operating principle
Diaphragm liquid pumps are based on reciprocating displacement
pump technology. An elastic diaphragm (4) is moved up and down
by the eccentric (5) and the connecting rod (6). During the down
stroke, the diaphragm sucks in the medium through the inlet valve
(2). During the up stroke, it forces medium out of the pump head
through the exhaust valve (1). The diaphragm hermetically seals
off the working chamber (3) from the pump drive (7).
NF 300 version (specified flow rate)
This pump type is the simplest version of the listed products and
pumps media at the specified flow rate.
NF 300 .27 version (specified flow rate with
overpressure limiting)
If the diaphragm liquid pump is operating against a closed system,
the delivery pressure quickly exceeds the maximum permissible
values. To prevent this happening, an overpressure relief is inte-
grated in the top part of the pump head. If the pressure exceeds
the variable limit range (min. 1.5 to max. 6.5 barg), the valve opens
and the liquid circulates from the pressure side to the suction side
via an internal bypass system. This prevents any further rise in
pressure.

Diaphragm liquid pump NF 300 Installation and connection
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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 notes (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. 3 to 8)
Fig. 5: Mounting dimensions NF 300 DC
Fig. 6: Mounting dimensions NF 1.300 DC
Mounting dimensions

Diaphragm liquid pump NF 300 Installation and connection
KNF Flodos BA_NF300_EN_08_068697.docx
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Fig. 7: Mounting dimensions NF 300 DCB
Fig. 8: Mounting dimensions NF 1.300 DCB

Diaphragm liquid pump NF 300 Installation and connection
KNF Flodos BA_NF300_EN_08_068697.docx
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➔For pumps with fan: mount the pump so that the fan of the
motor can suck in sufficient cooling air.
➔Make sure that the installation location is dry and the pump is
protected against rain, splashes, hose and drip water.
➔Protect the pump against dust.
➔Protect the pump against vibrations and jolts.
➔Generally speaking, the pump can be mounted in any orienta-
tion. The venting and accuracy of the pump is optimal if in-
stalled as shown in the illustration (Fig. 9).
➔KNF recommends mechanically decoupling the pump from the
pipework system, e.g. by using flexible hoses or pipes. This
prevents any oscillations of the pump being transferred to the
system.
Cooling air supply
Installation location
Mounting orientation
Fig. 9: Optimal mounting orienta-
tion / horizontal
Decoupling

Diaphragm liquid pump NF 300 Installation and connection
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For pumps with alternating current motors:
WARNING
Danger of injury during operation
➔Take protective measures against touching parts
which are energised (live), such as electrical
connections or windings.
➔Take protective measures against touching
moving parts (e.g. fan).
Danger of damaging the pump during operation
➔Take protective measures to ensure that no
foreign objects can get into the pump or pene-
trate the motor (see protection class).
6.2. Electrical connection
For pumps with alternating current motors:
DANGER
Risk of electric shock, danger of death
➔Pump should only be connected by a specialist.
➔Only connect the pump when the power supply
is turned off.
For pumps with direct current motors:
➔Pump should only be connected by a specialist.
➔Only connect the pump when the power supply is turned off.
➔All electrical connection work must adhere to the pertinent
guidelines, regulations and technical standards.
Touch and foreign object pro-
tection

Diaphragm liquid pump NF 300 Installation and connection
KNF Flodos BA_NF300_EN_08_068697.docx
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Connecting the pump
Make sure that the power supply data match the data on the
motor type plate. The current consumption can be found on the
type plate.
Connect the motor cables. Electrical data Chapter 4.
Always check polarity of cables.
For DC motors:
red motor cable: +
black motor cable: -
In the case of brushless DC motors:
incorrect polarity may damage the electronics!
If using AC motors, the power supply must not deviate more
than a maximum of +/- 10 % from the specifications on the
type plate.
In order to ensure that emissions comply with the EN 55014 - 1
emission standard, this pump type with a brushless DC motor DCB
must be fitted with an additional circuit. The additional circuit must
be installed as closely as possible to the motor.
The additional circuit must be installed according to the following
wiring diagram and its defined components in order to achieve the
required level of attenuation.
Fig. 10: Additional circuit
6.3. Hydraulic connection
➔Only connect components to the pump that are designed to
handle the hydraulic data of the pump (see Chapter 4, Tech-
nical data).
➔Only use hoses that are suitable for the maximum operating
pressure of the pump (see Chapter 4).
➔Only use hoses that are chemically resistant to the liquids
being pumped.
Additional circuit for
brushless DCB motors
C1: Condenser
≥ 2200 µF / UN = 12 V
≥ 1000 µF / UN = 24 V
Connected
components
Hoses

Diaphragm liquid pump NF 300 Installation and connection
KNF Flodos BA_NF300_EN_08_068697.docx
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6.3.1. Connecting the pump
Arrows on the pump head indicate the flow direction.
Remove the protective caps from the connections.
Connect the inlet and outlet lines.
Keep the inlet 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.

Diaphragm liquid pump NF 300 Operation
KNF Flodos BA_NF300_EN_08_068697.docx
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7. Operation
➔The pumps should only be used under the operating parame-
ters/conditions described in Chapter 4, Technical data.
➔Ensure that the pumps are being used correctly (see Section
2.1).
➔Improper use of the pumps must be prevented (see Section
2.2).
➔Observe the safety notes (see chapter 3).
➔Pumps are components intended to be incorporated into
another machine. The machine/equipment in which the pumps
are installed must be made to fully comply with the pertinent
regulations before being put into operation.
CAUTION
Risk of burning
The drive heats up.
➔Avoid contact with the drive.
➔Avoid contact with flammable materials.
WARNING
Danger of bursting of the fluid system due to
overpressure.
The pump builds up pressure. A closed system can
cause the max. permitted operating pressure to be
exceeded. This can cause injuries or damage to the
pump and the system.
➔Avoid operation against a closed system.
➔Only use wetted parts that are rated for at least
the operating pressure of the pump.
➔If necessary, limit the maximum system pressure
by suitable measures.
Excessive pressures and its inherent dangers can be prevent-
ed by using a bypass system with a pressure relief valve
between the pressure and suction side of the pump. Further
information is available from your KNF adviser (Telephone
number: see first page).
➔If the pump stops running, reduce the pressure in the system
until it is at normal atmospheric pressure.
For pumps with thermal switch or electronic overload protection:
Pump standstill

Diaphragm liquid pump NF 300 Operation
KNF Flodos BA_NF300_EN_08_068697.docx
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WARNING
Risk of physical injury and damage to the pump due
to automatic start
If the pump overheats and the thermal switch / elec-
tronics stops pump operation, 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.
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 / impulse 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 a KNF pump specialist for further information
(Telephone number: see first page).
Turning the pump on
➔In order to guarantee that the pump can start every time it is
advisable to reduce the back pressure to an acceptable level.
This is also the case if there is a short power cut.
For more specific information contact the KNF specialist (Tele-
phone number: see first page).
Turning the pump off
➔KNF recommends: if pumping aggressive liquids, the pump
should be rinsed thoroughly prior to switch off (see Section
8.2.1), as this will help to lengthen the service life of the dia-
phragm.
➔Ensure that the system is subject to normal atmospheric pres-
sure (release the hydraulic pressure).
Flow rate NF 300
Adjusting and controlling the
motor speed
Impulse operation

Diaphragm liquid pump NF 300 Operation
KNF Flodos BA_NF300_EN_08_068697.docx
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Fig. 11: Flow rate of pump NF 300 DC / DCB
Flow rate NF 1.300
Fig. 12: Flow rate of pump NF 1.300 DC / DCB

Diaphragm liquid pump NF 300 Servicing
KNF Flodos BA_NF300_EN_08_068697.docx
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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 (Section 8.2)
Diaphragm, valve
plates and seals
-Change as soon as pumping capac-
ity decreases, preferably sooner
Tab. 15
8.2. Cleaning
WARNING
Health hazard due to dangerous substances in the
pump!
Depending on the substance transferred, risk of
caustic burns or poisoning.
➔Wear protective clothing if necessary, e.g. pro-
tective gloves.
➔Rinse the pump with a neutral liquid and pump
empty.
8.2.1. Flushing the pump
➔If pumping aggressive media, KNF recommends flushing the
pump with air under atmospheric conditions for several
minutes prior to switch off (if necessary for safety reasons: use
an inert gas). This will extend the service life of the diaphragm.
8.2.2. Cleaning the pump
➔Where possible, wipe the components with a soft dry cloth. Do
not use cleaning solvents as these may corrode plastic parts.
➔If there is compressed air available, blow off the separate
parts.
▪Pump must be switched off and mains plug removed from
the socket.
▪The pump must be free of any hazardous substances.
▪Hoses must be disconnected from the pump head.
▪We recommend replacing the diaphragm when the head
parts are removed.
Qty.
Tools for KP-, KP.51-, KT- and TT versions
1
Torx 20 screwdriver
Qty.
Tools for FT version
1
No.2 Phillips screwdriver for FT version
Tab. 16
Information on procedure
Prior requirements
Tools