KNF NF 2.35 User manual
KNF Flodos AG BA_NF2-35_EN_02_164912
Translation of original Operating and Installation Instructions Keep for future reference!
DIAPHRAGM LIQUID PUMP
NF 2.35
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 ............................................................. 8
6. Installation and connection....................................................... 9
7. Operation................................................................................ 13
8. Servicing................................................................................. 15
9. Troubleshooting...................................................................... 17
10. Decontamination declaration.................................................. 19
KNF Flodos AG
Wassermatte 2
6210 Sursee, Switzerland
Tel +41 (0)41 925 00 25
Fax +41 (0)41 925 00 35
www.knf-flodos.ch
info@knf-flodos.ch
NF 2.35 XP DC 24V
- / PMLxxxx / PLxxxx [Ch. 1]
NF
2.35
XP / XT [Ch. 4]
DCB-B / DCB-4B
Supply voltage [Ch. 4]
Diaphragm liquid pump NF 2.35 About this document
KNF Flodos AG BA_NF2-35_EN_02_164912
Translation of original Operating and Installation Instructions 2
1. About this document
Disclaimer of liability
KNF accepts no liability for any damage caused by failure to
follow the operating instructions.
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
subsequent owners of the pump.
Customer-specific project pumps (pump models which begin with
"PL" or "PML") may differ from the Operating and Installation
Instructions.
➔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 include death or
serious injuries and/or serious
property damage
WARNING
warns of potential
danger
Death or serious injuries and/or
serious property damage are
possible
CAUTION
warns of a poten-
tially dangerous
situation
Minor injuries or damage to
property are possible
Tab. 1
Other information and symbols
➔This indicates an activity (step) that must be carried out.
This indicates the first step of an activity to be carried out. Any
additional steps required are numbered consecutively.
This symbol indicates important information.
Project pumps
Diaphragm liquid pump NF 2.35 Use
KNF Flodos AG BA_NF2-35_EN_02_164912
Translation of original Operating and Installation Instructions 3
2. Use
2.1. Intended use
The pumps are intended for transferring liquids.
Owner's responsibility
The pumps must only be installed and operated under the operat-
ing parameters and conditions described in Chapter 4, Technical
data.
Before transferring or metering 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, pump housing, diaphragm and valves with the
medium.
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.
2.2. Improper use
DANGER
The pumps must not be operated in an explosive
atmosphere.
DANGER
The pumps must not be used to transfer liquids in
systems in which there is a risk of bursting due to
overpressure.
For special modifications outside the standard technical specifica-
tions, please contact your KNF technical adviser.
Operating parameters and
conditions
CAUTION
The pump and hoses generate vibrations
➔The pump and hoses must be secured before
the pump is switched on.
➔Only completely installed pumps may be taken
into service.
Requirements for
transferred medium
Risk of explosion
Risk of bursting
Diaphragm liquid pump NF 2.35 Safety
KNF Flodos AG BA_NF2-35_EN_02_164912
Translation of original Operating and Installation Instructions 4
3. Safety
Observe the safety precautions in Chapters
6. Installation and connection and 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 and read and observe the safety
data sheets.
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.
Ensure that the old appliance is disposed of in an envi-
ronmentally-appropriate manner. Use appropriate waste
collection systems for the disposal of end-of-life equip-
ment. Used pumps contain valuable recyclable materials.
Personnel
Working in a
safety-conscious manner
Handling dangerous media
Information
Environmental protection
Disposal
Diaphragm liquid pump NF 2.35 Safety
KNF Flodos AG BA_NF2-35_EN_02_164912
Translation of original Operating and Installation Instructions 5
The pumps comply with the fundamental requirements of Directive
2011/65/EU (RoHS2).
The pumps comply with the safety requirements regarding elec-
tromagnetic compatibility in Directive 2004/108/EG.
For the purposes of the Machinery Directive 2006/42/EG, pumps
are “partly completed machinery", and are therefore to be regarded
as not ready for use. Partly completed machinery may not be
commissioned until such time as it has been determined that the
machine in which the partly completed machinery is to be assem-
bled conforms to the provisions of the Machinery Directive
2006/42/EG. The essential requirements of Annex I of Directive
2006/42/EG (general principles) are applied and observed.
The following harmonised standards are met:
NF 2.35 DCB-B / DCB-4B
▪IEC/EN 61000-6-2
▪IEC/EN 61000-6-3
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 2.35 Technical data
KNF Flodos AG BA_NF2-35_EN_02_164912
Translation of original Operating and Installation Instructions 6
4. Technical data
Pump materials
The pump type XP stands for:
Parts in contact with media
Material1)
Pump head 2)
PEEK
Valve plate
EPDM
O-ring
EPDM
Diaphragm
EPDM
Resonating Diaphragm
PTFE
Tab. 2
The pump type XT stands for:
Parts in contact with media
Material1)
Pump head 2)
PEEK
Valve plate
FFKM
O-ring
FFKM
Diaphragm
PTFE
Resonating diaphragm
PTFE
Tab. 3
1) according to DIN ISO 1629 and 1043.1
2) The pump head comprises an intermediate plate and a connecting plate
Hydraulic ratings
Parameter
Value
PN (nominal pressure) [bar g] 3)
16
Flow rate [ml/min] 4)
350
Max. suction head [mWG]
3
Max. inlet pressure [bar] 3)
0.5
Tab. 4
3) Higher pressures are possible on a project basis
4) Measured with water at 20 °C. Flow rates may vary from the values
shown, depending on fluid viscosity, pump head material and the hos-
es/hose connectors used.
Hydraulic connections
Parameter
Value
Push-in fittings external Ø [mm]
4 ± 0.1
Push-in fittings external Ø [inches]
5/32 ± 0.004
Recommended hose OD x ID [mm]
4.0 x 2.5
Tab. 5
Diaphragm liquid pump NF 2.35 Technical data
KNF Flodos AG BA_NF2-35_EN_02_164912
Translation of original Operating and Installation Instructions 7
Specifications NF 2.35 DCB-B / DCB-4B
Motor variant
DCB-B
DCB-B
DCB-4B
Supply voltage [V]
12
24
10..26.4
Power consumption [W]
10.3
11
12.3
Max. I load [A]
0.86
0.46
1.1..0.44
Protection class [-]
IP50
Weight [g] 1)
260
Tab. 6
1) The weight may differ slightly from the stated value, depending on the
version.
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. 7
CAUTION
Risk of burns when transferring hot media
➔Do not touch the pump or the media transfer
system.
➔Avoid contact with flammable materials.
Diaphragm liquid pump NF 2.35 Assembly and function
KNF Flodos AG BA_NF2-35_EN_02_164912
Translation of original Operating and Installation Instructions 8
5. Assembly and function
Assembly
1Outlet
2Inlet
3Head plate
4Connecting plate
5Intermediate plate
6Motor
7Connecting lead
Fig. 1: Diaphragm liquid pump
1Outlet valve
2Inlet valve
3Working chamber
4Diaphragm
5Eccentric
6Connecting rod
7Pump drive
Fig. 2: Pump assembly
The diaphragm liquid pumps are based on reciprocating displace-
ment 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
hermetically seals off the working chamber (3) from the pump drive
(7).
Diaphragm liquid pump NF 2.35 Installation and connection
KNF Flodos AG BA_NF2-35_EN_02_164912
Translation of original Operating and Installation Instructions 9
6. Installation and connection
Please note:
Chapter 2 Use
Chapter 3 Safety
Chapter 4 Technical data
Only install the pumps under the operating parameters and condi-
tions permitted in these instructions.
➔Before installation, store the pump at the installation location to
bring it up to ambient temperature.
➔Mounting dimensions (see Fig. 3 and 4)
Fig. 3: Mounting dimensions NF 2.35 DCB-B
Fig. 4: Mounting dimensions NF 2.35 DCB-4B
➔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.
➔The pump can be mounted in any orientation.
Mounting dimensions
Installation location
Installation position
Diaphragm liquid pump NF 2.35 Installation and connection
KNF Flodos AG BA_NF2-35_EN_02_164912
Translation of original Operating and Installation Instructions 10
6.1. Electrical connection
➔Only have the pump connected by an authorized specialist.
➔Only connect the pump when the power supply is disconnected.
➔When connecting the device to a power source, the applicable
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 motor lead For electrical data see Chapter 4.
Note the proper polarity.
red motor lead: +
black motor lead: -
Table of contents
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