KNF N035 AN.18, N035 AV.18, N035.1.2 AN.18, N035 AT.18, N035.1.2 AT.18 Operating Instructions Manual

KNF 121228-121398 04/14
Translation of original Operating Instructions, english Keep for future use!

Operating Instructions

Read and observe these Operating Instructions!

Diaphragm Vacuum Pumps and Compressors

N035 AN.18
N035 AT.18
N035 AV.18

N035.1.2 AN.18
N035.1.2 AT.18
N035.1.2 AV.18

N035.3 AN.18
N035.3 AT.18
N035.3 AV.18

KNF Neuberger GmbH
Alter Weg 3
79112 Freiburg
Germany
Phone [phone] / 5909-0
Fax [phone] / 5909-99
E-Mail: [e-mail]
www.knf.de

Contents Page

1. About this document ................................................................. 3

2. Use ............................................................................................ 4

3. Safety ........................................................................................ 5

4. Technical Data .......................................................................... 7

5. Design and Function ............................................................... 11

6. Installation and connection ...................................................... 13

7. Operation ................................................................................. 14

8. Servicing .................................................................................. 16

9. Troubleshooting ....................................................................... 20

10. Spare parts and accessories ................................................... 22

11. Returns .................................................................................... 23

12. Health and safety clearance and decontamination form ......... 24

Diaphragm Pumps N 035.18 About this document

Translation of original Operating instructions, english, KNF 121228-121398 04/14 3

1. About this document

1.1. Using the Operating Instructions

The Operating Instructions are part of the pump.

 Carefully study the Operating Instructions before using a

pump.

 Always keep the Operating Instructions handy in the work

area.

 Pass on the Operating Instructions to the next owner.

Customer-specific project pumps (pump models which begin with
“PJ” or “PM”) may differ from the Operating Instructions.

 For project pumps, also observe the agreed upon specifica-

tions.

1.2. Symbols and Markings

Warning

WARNING

A danger warning is located here.

Possible consequences of a failure to observe the

warning are specified here. The signal word, e.g.

Warning, indicates the danger level.

 Measures for avoiding the danger and its conse-

quences are specified here.

Danger levels

Signal word Meaning Consequences if not observed

DANGER

warns of immedi­ate danger

Death or serious injuries
and/or serious damage are the
consequence.

WARNING

warns of possible
danger

Death or serious injuries
and/or serious damage are
possible.

CAUTION

warns of a possibly
dangerous situa­tion

Minor injuries or damage are
possible.

Tab. 1

Other information and symbols

 An activity to be carried out (a step) is specified here.

1. The first step of an activity to be carried out is specified here.
Additional, consecutively numbered steps follow.

This symbol refers to important information.

Project pumps

Use Diaphragm Pumps N 035.18

4 Translation of original Operating Instructions, english, KNF 121228-121398 04/14

2. Use

2.1. Proper use

The pumps are exclusively intended for transferring gases and
vapors.

Owner's responsibility

Only install and operate the pumps under the operating parameters
and conditions described in Chapter 4, Technical data.

Make sure that the installation location is dry and the pump is
protected against rain, splash, hose and drip water.

Before using 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, diaphragm and valves with the medium.

Only transfer gases which remain stable under the pressures and
temperatures occurring in the pump.

2.2. Improper use

The pumps may not be operated in an explosive atmosphere.

The pumps are not suitable for transferring dusts.

The pumps are not suitable for transferring liquids.

Pumps designed to create either a vacuum or an overpressure
must not be used for these two purposes simultaneously.

An overpressure must not be applied to the suction side of the
pump.

Operating parameters and

conditions

Requirements for

transferred medium

Diaphragm Pumps N 035.18 Safety

Translation of original Operating instructions, english, KNF 121228-121398 04/14 5

3. Safety

Note the safety precautions in sections 6. Installation and
connection, and 7. Operation.

The pumps are built according to the generally recognized rules of
technology and in accordance with the 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 when they are in a good technical and proper
working order, in accordance with their intended use, observing the
safety advice within the operating 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 the personnel has read and understood the operat­ing instructions, and in particular the "Safety" chapter.

Observe the accident prevention and safety regulations when
performing any work on the pump and during operation.

Do not expose any part of your body to the vacuum.

Open housing parts with notice sticker (see fig. 1) only after
separating mains plug from power source.

When transferring dangerous media, observe the safety regula­tions when handling these media.

Be aware that the pumps are not designed to be explosion-proof.

Make sure the temperature of the medium is always sufficiently
below the ignition temperature of the medium, to avoid ignition or
explosion. This also applies for unusual operational situations.

Note that the temperature of the medium increases when the pump
compresses the medium.

Hence, make sure the temperature of the medium is 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 the technical specifications (see section 4).

If necessary, consider any external sources of energy, such as
radiation, that may add heat to the medium.

In case of doubt, consult the KNF customer service.

Store all replacement parts in a protected manner and dispose of
them properly in accordance with the applicable environmental
protection regulations. Observe the respective national and inter­national regulations. This especially applies to parts contaminated
with toxic substances.

Personnel

Working in a safety-

conscious manner

Fig. 1: Notice sticker

Handling dangerous media

Handling flammable media

Environmental protection

Safety Diaphragm Pumps N 035.18

6 Translation of original Operating Instructions, english, KNF 121228-121398 04/14

The pumps conform to the Directive 2011/65/EU (RoHS2).

The pumps conform to the safety regulations of the EC Directive
2004/108/EG concerning Electromagnetic Compatibility and the
EC Directive 2006/42/EG concerning Machinery.

The following harmonized standards have been used:

IP20 IP44
DIN EN 55014-1/2 DIN EN 55014-1/2
DIN EN 61000-3-2/3 DIN EN 61000-3-2/3
DIN EN 60335-1 DIN EN 60204-1

Tab. 2

Only have repairs to the pump carried out by the KNF Customer
Service responsible.

Only authorized personnel should open those parts of the housing
that contain live electrical parts.

Use only genuine parts from KNF for servicing work.

Standards

Customer service and

repairs

Diaphragm Pumps N 035.18 Technical Data

Translation of original Operating instructions, english, KNF 121228-121398 04/14 7

4. Technical Data

Pump materials

Pump type Material

Pump head Diaphragm Valve Gasket

N 035 AN.18

Aluminium CR Stainless steel CR

N 035.1.2 AN.18
N 035.3 AN.18
N 035 AT.18

Aluminium PTFE-coated Stainless steel FPM

N 035.1.2 AT.18
N 035.3 AT.18
N 035 AV.18

Aluminium FPM Stainless steel FPM

N 035.1.2 AV.18
N 035.3 AV.18

Tab. 3

Pneumatic Values

Pump type

Delivery rate* at
atm. pressure (l/min)

Maximal operating
pressure (bar g)

Ultimate vacuum
(mbar abs.)

N 035 AN.18 30

4

100

N 035 AT.18 27
N 035 AV.18 30 2
N 035.1.2 AN.18 55

4

N 035.1.2 AT.18 50
N 035.1.2 AV.18 55 2
N 035.3 AN.18 30 - 13
N 035.3 AT.18 27 - 20
N 035.3 AV.18 30 - 13

Tab. 4 *Liters in standard state (1013 mbar)

Technical Data Diaphragm Pumps N 035.18

8 Translation of original Operating Instructions, english, KNF 121228-121398 04/14

Electrical Data 100 V versions

Pump Type* Voltage [V] Frequency [Hz] Power P1 [W] Operating

current [A]

N 035 AN.18 IP 20

100 50/60 250 2.7 N 035 AT.18 IP 20
N 035 AV.18 IP 20
N 035 AN.18 IP 44

100 50/60 230 3.4 N 035 AT.18 IP 44
N 035 AV.18 IP 44
N 035.1.2 AN.18 IP 20

100 50/60 300 3.5 N 035.1.2 AT.18 IP 20
N 035.1.2 AV.18 IP 20
N 035.1.2 AN.18 IP 44

100 50/60 360 4.8 N 035.1.2 AT.18 IP 44
N 035.1.2 AV.18 IP 44
N 035.3 AN.18 IP 20

100 50/60 300 3.5 N 035.3 AT.18 IP 20
N 035.3 AV.18 IP 20
N 035.3 AN.18 IP 44

100 50/60 360 4.8 N 035.3 AT.18 IP 44
N 035.3 AV.18 IP 44

Tab. 5 *see type plate

Electrical Data 115 V versions

Pump Type* Voltage [V] Frequency [Hz] Power P1 [W] Operating

current [A]

N 035 AN.18 IP 20

115 50 220 2 N 035 AT.18 IP 20
N 035 AV.18 IP 20
N 035 AN.18 IP 44

115 50 230 2.7 N 035 AT.18 IP 44
N 035 AV.18 IP 44
N 035.1.2 AN.18 IP 20

115 50 300 3 N 035.1.2 AT.18 IP 20
N 035.1.2 AV.18 IP 20
N 035.1.2 AN.18 IP 44

115 50 330 3.4 N 035.1.2 AT.18 IP 44
N 035.1.2 AV.18 IP 44
N 035.3 AN.18 IP 20

115 50 300 3 N 035.3 AT.18 IP 20
N 035.3 AV.18 IP 20
N 035.3 AN.18 IP 44

115 50 330 3.4 N 035.3 AT.18 IP 44
N 035.3 AV.18 IP 44

Tab. 6 *see type plate

Diaphragm Pumps N 035.18 Technical Data

Translation of original Operating instructions, english, KNF 121228-121398 04/14 9

Electrical Data 230 V versions

Pump Type* Voltage [V] Frequency [Hz] Power P1 [W] Operating

current [A]

N 035 AN.18 IP 20

230 50 220 1 N 035 AT.18 IP 20
N 035 AV.18 IP 20
N 035 AN.18 IP 44

230 50 230 1.7 N 035 AT.18 IP 44
N 035 AV.18 IP 44
N 035.1.2 AN.18 IP 20

230 50 300 1.55 N 035.1.2 AT.18 IP 20
N 035.1.2 AV.18 IP 20
N 035.1.2 AN.18 IP 44

230 50 320 1.9 N 035.1.2 AT.18 IP 44
N 035.1.2 AV.18 IP 44
N 035.3 AN.18 IP 20

230 50 300 1.55 N 035.3 AT.18 IP 20
N 035.3 AV.18 IP 20
N 035.3 AN.18 IP 44

230 50 320 1.9 N 035.3 AT.18 IP 44
N 035.3 AV.18 IP 44

Tab. 7 *see type plate

The pumps are fitted as standard with a thermal-switch to protect
against overloading.

Technical Data Diaphragm Pumps N 035.18

10 Translation of original Operating Instructions, English, KNF 121228-121398 04/14

Other parameters

Pneumatic connections

Hose connections N 035._ A _.18
[mm]

ID 9

Ambient and media temperature

Permissible
ambient temperature

+ 5 °C to + 40 °C

Permissible media temperature + 5 °C to + 40 °C

Other parameters

Maximum permissible ambient
relative humidity

80 % for temperatures up
to 31°C, decreasing linear­ly to 50 % at 40°C

Max. altitude of site
[m above sea level]

2000

Maximum permitted mains voltage
fluctuations

+/- 10 %

Weight

N 035 A_.18 [kg] 8.5
N 035._ A_.18 IP20 [kg] 11.5
N 035._ A_.18 IP44 [kg] 12

Dimensions

N 35 A_.18 IP20
L x H x W [mm]

265 x 254 x 143

N 035.1.2 A_.18 IP20
L x H x W [mm]

321 x 222 x 250

N 035.3 A_.18 IP20
L x H x W [mm]

323 x 222 x 250

N 35 A_.18 IP44
L x H x W [mm]

280 x 255 x 198

N 035.1.2 A_.18 IP44
L x H x W [mm]

349 x 222 x 250

N 035.3 A_.18 IP44
L x H x W [mm]

351 x 222 x 250

Tab. 8

Diaphragm Pumps N 035.18 Design and Function

Translation of original Operating Instructions, English, KNF 121228-121398 04/14 11

5. Design and Function

Design N 035 A_.18

1 Pneumatic pump outlet
2 Pneumatic pump inlet
3 On/Off Switch
4 Handle

Fig. 2: Diaphragm Pump N 035 AN.18

Design N 035.1.2 A_.18

1 Pneumatic pump outlet
2 Pneumatic pump inlet
3 On/Off Switch
4 Pneumatic head connection 1
5 Handle
6 Pneumatic head connection 2

Fig. 3: Diaphragm Pump N 035.1.2 AN.18

Design and Function Diaphragm Pumps N 035.18

12 Translation of original Operating Instructions, English, KNF 121228-121398 04/14

Design N 035.3 A_.18

1 Pneumatic pump outlet
2 Pneumatic pump inlet
3 On/Off Switch
4 Handle
5 Pneumatic head connection
6 Silencer/filter (accessory)

Fig. 4: Diaphragm pump N 035.3 AN.18

Function diaphragm pump

1 Outlet valve
2 Inlet valve
3 Transfer chamber
4 Diaphragm
5 Eccentric
6 Connecting rod
7 Pump drive

Fig. 5: Pump head

The pump transfers, compresses (depending on pump version)
and evacuates gases and vapors.

The elastic diaphragm (4) is moved up and down by the eccentric
(5) and the connecting rod (6). In the downward stroke it aspirates
the gas to be transferred via the inlet valve (2). In the upward
stroke, the diaphragm presses the medium out of the pump head
via the outlet valve (1). The transfer chamber (3) is hermetically
separated from the pump drive (7) by the diaphragm.

Diaphragm Pumps N 035.18 Installation and connection

Translation of original Operating Instructions, English, KNF 121228-121398 04/14 13

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 precautions (see chapter 3).

6.1. Installation

 Before installation, store the pump at the installation location to

bring it up to room temperature.

 See chapter 4, Technical data, for the dimensions of pump.

 Install the pump so that the motor fan can intake sufficient

cooling air.

 Make sure that the installation location is dry and the pump is

protected against rain, splash, hose and drip water.

 Choose a safe location (flat surface) for the pump.

 Protect the pump from dust.

 Protect the pump from vibrations and jolts.

6.2. Connection

 Only connect components to the pump which are designed for

the pneumatic data of the pump (see section 4).

 If the pump is used as a vacuum pump, safely discharge the

pump exhaust at the pump’s pneumatic outlet.

A marking on the pump head shows the direction of flow.

1. Remove the protective plugs from the pneumatic connectors of
the pump.

2. Mount accessory silencer/filter (where applicable):

If the pump is used as a vacuum pump, mount the silencer at
the pressure side if necessary. If the pump is used as a com­pressor (not permitted with series N 035.3) mount the filter at
the suction side if necessary.

− Unscrew corresponding hose connector from pump head.

− Screw silencer/filter into pump head.

3. Connect the suction line and pressure line (tube inner diameter
9 mm).

4. Lay the suction and pressure line at a downward angle to
prevent condensate from running into the pump.

5. Insert the power cable’s plug into a properly installed
shockproof socket.

Dimensions

Cooling air supply

Installation location

Connected components

Pump exhaust

Connection

Operation Diaphragm Pumps N 035.18

14 Translation of original Operating Instructions, English, KNF 121228-121398 04/14

7. Operation

7.1. Preparing for Start-up

Before switching on the pump, observe the following points:

Operational requirements
Pump All hoses attached properly

Fan openings not blocked

Specifications of the power supply correspond with the

data on the pump’s type plate.

The pump outlet is not closed or constricted.

Tab. 9

7.2. Starting

 Only operate the pump under the operating parameters and

conditions described in chapter 4, Technical data.

 Make sure the pump is used properly (see section 2.1).

 Make sure the pump is not used improperly (see section 2.2).

 Observe the safety precautions (see chapter 3).

WARNING

Hazard of the pump head bursting due to excessive
pressure increase

 Do not exceed max. permissible operating

pressure (see section 4).

 Monitor pressure during operation.

 If the pressure exceeds the maximum permissi-

ble operating pressure, immediately shut down
pump and eliminate fault (see chapter 9. Trou­bleshooting).

 Only throttle or regulate the air

or gas quantity in

the suction line to prevent the maximum permis­sible operating pressure from being exceeded.

 If the air or gas quantity in the pressure line is

throttled or regulated, make sure that the maxi­mum permissible operating pressure of the
pump is not exceeded.

Excessive pressure (with all of the related hazards) can be
prevented by placing a bypass line with a pressure-relief valve

between the pressure and suction side of the pump. For further

information, contact our technical adviser.

 With the pump at a standstill, open pressure and suction lines

to normal atmospheric pressure.

Pump standstill

Diaphragm Pumps N 035.18 Operation

Translation of original Operating Instructions, English, KNF 121228-121398 04/14 15

WARNING

Automatic starting can cause personal injury and
pump damage

When the operation of the pump is interrupted by the

thermal switch, the pump will restart automatically
after cooling down.



After triggering of the thermal protection or in the

event of power failure, remove the pump’s mains

plug from the socket so that the pump cannot
start uncontrollably.

 Attempt work on the pump only if the pump is

separated from mains power.

7.3. Switching pump on and off

Switching pump on

The pump may not start up against pressure or vacuum during
switch-

on. This also applies in operation following a brief power

failure. If a pump starts against pressure, it may block. This
activates the thermal switch, and the pump switches off.

 Make sure that no pressure or vacuum is present in the lines

during switch-on.

 Switch on pump with mains switch (see fig. 2, 3 or 4, position

3).

Switching off the pump/removing from operation

 When transferring aggressive media, flush the pump prior to

switch-off to increase the service life of the diaphragm (see
section 8.2.1).

 Switch off pump with mains switch (see fig. 2, 3 or 4, position

3).

 Open pressure and suction lines to normal atmospheric pres-

sure.

Servicing Diaphragm Pumps N 035.18

16 Translation of original Operating Instructions, English, KNF 121228-121398 04/14

8. Servicing

8.1. Servicing Schedule

Component Servicing interval
Pump Regular inspection for external damage or

leaks

Diaphragm, reed
valves (valve plate)

Replace at the latest, when pump output
decreases

Silencer/filter (ac­cessory)

Change if it is dirty

Tab. 10

8.2. Cleaning

When cleaning, make sure that no liquids enter the inside of
the housing.

8.2.1. Flushing Pump

 Before switching off the pump, flush it with air (if neccesary for

safety reasons: with an inert gas) for about five minutes under
atmospheric conditions (ambient pressure).

8.2.2. Cleaning Pump

 Only use solvents for cleaning if the head materials cannot be

attacked (check the resistance of the material!).

 If compressed air is available, blow out the components.

Diaphragm Pumps N 035.18 Servicing

Translation of original Operating Instructions, English, KNF 121228-121398 04/14 17

8.3. Changing Diaphragm and Valves

 Pump is switched off and mains plug is removed from the

socket

 Pump is clean and free of hazardous materials

 Tubes removed from pump’s pneumatic inlet and outlet

Spare part*

Position** Quantity per

pump head
Diaphragm (F) 1
Countersunk

screw

(D) 1

Reed valve (M,P) 2
Gasket (V) 1

Tab. 11 *According to Spare parts list, chapter 10

**According to Fig. 6.

Quantity Tools/Material
1 Allen key 3 mm
1 Allen key 4 mm
1 Allen key 5 mm
1 Screwdriver blade width 6.5
1 Screwdriver blade width 4.0
1 Fork wrench 16 mm (only for two-headed pumps)
1 Pencil

Tab. 12

With multi-head pumps, parts of the individual pump heads can be
confused.

 Replace the diaphragm and reed valves of the individual pump

heads consecutively.

WARNING

Health hazard due to dangerous substances
in the pump!

Depending on the substance transferred, caustic
burns or poisoning are possible.

 Wear protective clothing if necessary, e.g.

protective gloves.

 Flush pump before replacing the diaphragm and

redd valves (see section 8.2.1).

Conditions

Spare parts

Tools

Information on procedure

Servicing Diaphragm Pumps N 035.18

18 Translation of original Operating Instructions, English, KNF 121228-121398 04/14

Fig. 6: Pump parts for versions with aluminium head

1. For pumps N 035.1.2 A_.18:
On both pneumatic head connections, open the head connec­tion union nut on one pump head and pull the hose off.

2. For pumps N 035.3 A_.18:
At one pump head open the union nut of pneumatic connection
and pull off the tube.

3. Mark the position of the diaphragm head C in relation of the
housing A with a pencil.

4. Loosen the four allen screws B and remove the diaphragm
head C.

5. Unscrew the countersunk screw D, remove the retainer plate E
and the diaphragm F.

6. Loosen the four screws G and remove the cover plate H.

7. Turn the counterweight J so that the connection rod K is in the
mid-position; fit the new diaphragm F.

8. Place the retainer plate E on the diaphragm F and carefully but
formly tighten the new countersunk screw D (torque: 5.0 Nm).

The self-locking screw D can only be used once.

Diaphragm Pumps N 035.18 Servicing

Translation of original Operating Instructions, English, KNF 121228-121398 04/14 19

9. Change lower reed valve:

− Undo the cheese head screw N and exchange the reed

valve M.

10. Change upper reed valve:

− Loosen the allen screws S, remove the cover plate T and

the gasket V.

− Undo the cheese head screw U and exchange the reed

valve P; tighten the cheese head screw U.

− Replace the cover plate T with a new gasket V and tighten

the allen screws S.

11. Place the diaphragm head C according to the marks made
previously and tighten the screws B uniformly and diagonally
(torque: 10.0 Nm).

12. Turn the counterweight J to check that the pump run freely.

13. For two-headed pumps:
Carry out steps 3 to 12 for the second pump head.

14. Replace the cover plate H and secure it with the four screws G.

15. For two-headed pumps:
Reattach the tube of pneumatic head connection onto the hose
connector and tighten the union nut.

For N 035.1.2 A_.18 pumps, this applies to both pneumatic
head connections.

Troubleshooting Diaphragm Pumps N 035.18

20 Translation of original Operating Instructions, English, KNF 121228-121398 04/14

9. Troubleshooting

DANGER

Extreme danger from electrical shock!



Disconnect the pump power supply before working

on the pump.

 Make sure the pump is de-energized and secure.

 Check the pump (see Tab. 13 to 16).

Pump does not transfer

Cause Fault remedy
No voltage in the power source  Check room fuse and switch on if necessary.

Thermal switch has operated
following to over-heating.

 Disconnect pump from mains.
 Allow pump to cool.
 Trace cause of over-heating and eliminate it.

Connections or lines blocked.  Check connections and lines.

 Remove blockage.

External valve is closed or filter
is clogged.

 Check external valves and filters.

Condensate has collected in
pump head.

 Detach the condensate source from the pump.
 Flush pump (see Section 8.2.1).

Diaphragm or reed valves
(valve plate) are worn.

 Replace diaphragm and reed valves (valve plate), (see

Section 8.3).

Tab. 13

Flow rate, pressure or vacuum too low

The pump does not achieve the output specified in the Technical data or the data sheet.
Cause Fault remedy
Condensate has collected in

pump head.

 Detach the condensate source from the pump.
 Flush pump (see Section 8.2.1).

There is gauge pressure on
pressure side and at the same
time vacuum or a pressure
above atmospheric pressure on
suction side.

 Change the pressure conditions.

Pneumatic lines or connection
parts have an insufficient cross
section.

 Disconnect pump from system to determine output values.
 Eliminate throttling (e.g. valve) if necessary.
 Use lines or connection parts with larger cross section if

necessary.

Leaks occur on connections,
lines or pump head.

 Check that tubes sit correctly on hose nozzles.
 Replace leaky tubes.
 Eliminate leaks.

Connections or lines completely
or partially jammed.

 Check connections and lines.
 Remove the jamming parts and particles.

Head parts are soiled.  Clean head components.

Diaphragm or reed valves
(valve plate) are worn.

 Replace diaphragm and reed valves (valve plate),

(see Section 8.3).

Diaphragm Pumps N 035.18 Troubleshooting

Translation of original Operating Instructions, English, KNF 121228-121398 04/14 21

Flow rate, pressure or vacuum too low

The pump does not achieve the output specified in the Technical data or the data sheet.
Cause Fault remedy
After diaphragm and reed

valves (valve plate) have been
replaced

 Check the tubing for leaks.
 Possibly carefully tighten the screws (B) and (S) (see fig. 6)

crosswise.

Tab. 14

Pump is switched on, but does not run, the on/off-switch on the pump is not lit

Cause Fault remedy
Pump is not connected with the

power source.

 Connect pump to mains power.

No voltage in the power source

 Check room fuse and switch on if necessary.

Tab. 15

Pump is switched on, but does not run, the on/off-switch on the pump is lit

Cause Cause
The thermal switch has opened

due to overheating

 Remove pump´s mains plug from the socket.
 Allow pump to cool.
 Trace cause of over-heating and elimate it.

Tab. 16

Fault cannot be rectified

If you are unable to determine any of the specified causes, send
the pump to KNF Customer Service (see last page for the ad­dress).

1. Flush the pump to free the pump head of dangerous or ag­gressive gases (see Section 8.2.1).

2. Clean the pump (see Section 8.2.2).

3. Send the pump, together with completed Health and Safety
Clearance and Decontamination Form (Chapter 12), to KNF
stating the nature of the transferred medium.

Spare parts and accessories Diaphragm Pumps N 035.18

22 Translation of original Operating Instructions, English, KNF 121228-121398 04/14

10. Spare parts and accessories

Spare parts

N 035 AN.18 N 035.1.2 AN.18 N 035.3 AN.18

Spare part Position* Order No.
Diaphragm (F)

001312

Countersunk screw (D)

110711

Reed valve (M, P)

001328

Gasket (V)

001326

Tab. 17 According to Fig. 6

N 035 AT.18 N 035.1.2 AT.18 N 035.3 AT.18

Spare part Position* Order No.
Diaphragm (F)

001406

Countersunk screw (D)

110711

Reed valve (M, P)

001328

Gasket (V)

011796

Tab. 18 According to Fig. 6

N 035 AV.18 N 035.1.2 AV.18 N 035.3 AV.18

Spare part Position* Order No.
Diaphragm (F) 001405
Countersunk screw (D) 110711
Reed valve (M, P) 001328
Gasket (V) 011796

Tab. 19 According to Fig. 6

Accessories

Accessory for pump type Order No.
Silencer/filter (G ¼) all 000352
Pressure relief valve
4 bar

N 035 AN.18
N 035.1.2 AN.18

047601

Fine control valve with
pressure gauge,
pressure side

N 035 AN.18
N 035.1.2 AN.18

000482

Fine control valve with
vacuum gauge,
suction side

N 035 AN.18
N 035.1.2 AN.18
N 035.3 AN.18

000354

Tab. 20

Diaphragm Pumps N 035.18 Returns

Translation of original Operating Instructions, English, KNF 121228-121398 04/14 23

11. Returns

Pumps and systems used in laboratories and process-based
industries are exposed to a wide variety of conditions. This means
that the components contacting pumped media could become
contaminated by toxic, radioactive, or otherwise hazardous sub­stances.

For this reason, customers who send any pumps or systems back
to KNF must submit a Health and safety clearance and decontami­nation form in order to avoid a hazardous situation for KNF em­ployees. This Health and safety clearance and decontamination
form provides the following information, among other things:

 physiological safety

 whether medium-contacting parts have been cleaned

 whether the equipment has been decontaminated

 media that have been pumped or used

and must declare physiological safety. To ensure worker safety,
work may not be started on pumps or systems without a signed
Health and safety clearance and decontamination form.

For optimal processing of a return, a copy of this declaration
should be sent in advance via e-mail, regular mail, or fax to KNF
Customer Service (refer to final page for address). In order to avoid
endangering employees who open the shipment's packaging,
despite any residual hazards, the original version of the Health and
safety clearance and decontamination form must accompany the
delivery receipt on the outside of the packing.

The template for the Health and safety clearance and decontami­nation form is included with these Operating Instructions and may
also be downloaded from the KNF website.

The customer must specify the device type(s) and serial number(s)
in the Health and safety clearance and decontamination form in
order to provide for the ambiguous assignment of the Declaration
to the device that is sent to KNF.

In addition to the customer's declaration of physiological safety,
information about operating conditions and the customer's applica­tion are also of importance to ensure that the return shipment is
handled appropriately. Therefore, the Health and safety clearance
and decontamination form requests this information as well.

Health and safety clearance and decontamination form Diaphragm Pumps N 035.18

24 Translation of original Operating Instructions, English, KNF 121228-121398 04/14

12. Health and safety clearance and decon­tamination form

KNF worldwide

Benelux

Netherlands

KNF Verder B.V.

Utrechtseweg 4a
NL-3451 GG Vleuten
Tel. [phone]
Fax [phone]
E-mail: [e-mail]

www.knf-verder.nl

Benelux

Belgium, Luxembourg

KNF Verder N.V.

Kontichsesteenweg 17
B-2630 Aartselaar
Tel. [phone]
Fax [phone]
E-mail: [e-mail]

www.knf.be

China

KNF Neuberger Trading

(Shanghai) Co., Ltd
No. 36 Lane 1000
Zhang Heng Road
Shanghai 201203, P.R. China
Tel. [phone]
Fax [phone]
E-mail: [e-mail]

www.knf.com.cn

Germany

KNF Neuberger GmbH

Alter Weg 3
D-79112 Freiburg
Tel. [phone]
Fax [phone]
E-mail: [e-mail]

www.knf.de

France, Morocco,
Algeria

KNF Neuberger

4, Bld. d’Alsace Z.I.
F-68128 Village-Neuf
Tel. [phone]
Fax [phone]
E-mail: [e-mail]

www.knf.fr

Great Britain

KNF Neuberger U.K. Ltd.

Avenue 2
Station Lane
Industrial Estate
Witney Oxon OX28 4FA
Tel. [phone]
Fax [phone]
E-mail: [e-mail]

www.knf.co.uk

India

KNF Pumps + Systems
(India) Pvt. Ltd.

RAJIV GANDHI INFOTECH PARK
Phase 1
Ganga Estate, Survey No. 152/2/2
Above AXIS BANK
Hinjewadi
Pune 411 057
Tel. [phone]
0091 (0)20 640 08 923
Fax [phone]
E-mail: [e-mail]

www.knfpumps.in

Italy

KNF ITALIA S.r.l.

Via Flumendosa, 10
I-20132 Milano
Tel. [phone]
Fax [phone]
E-mail: [e-mail]

www.knf.it

Japan

KNF Japan Co.Ltd.

Across Shinkawa Bldg. Annex 3F
1-16-14 Shinkawa, Chuo-ku,
Tokyo, Japan 104-0033
Tel. [phone]
Fax [phone]
E-mail: [e-mail]

www.knf.co.jp

Korea

KNF Neuberger Ltd.

Woosan Bldg.RM#202,
336-4, Hwikyung-Dong
Dongdaemun-Ku.,
130-090, Seoul
Tel. [phone]
Fax [phone]
E-mail: [e-mail]

www.knfkorea.com

Sweden, Denmark,
Finland, Norway

KNF Neuberger AB

Mejerivägen 4,
P.O. Box 44060
SE-10073 Stockholm
Tel. [phone]
Fax [phone]
E-mail: [e-mail]

www.knf.se

Switzerland

Sales

KNF Neuberger AG

Stockenstrasse 6
CH-8362 Balterswil
Tel. [phone]
Fax [phone]
E-mail: [e-mail]

www.knf.ch

Taiwan

KNF Neuberger Ltd.

9-2 FL., No., 24, Lane 123,
Section 6,
Ming Chuan East Road
Taipei City, Taiwan
Tel. [phone]
Fax [phone]
E-mail: [e-mail]

www.knftwn.com.tw

USA, Canada, South America

KNF Neuberger, Inc.

Two Black Forest Road
Trenton, New Jersey
08691-1810
Tel. [phone]
Fax [phone]
E-mail: [e-mail]

www.knfusa.com

South America
Direct Phone: [phone]
E-mail: [e-mail]

KNF product centres

Product centre for gas
pumps:

Germany

KNF Neuberger GmbH

Alter Weg 3
D-79112 Freiburg
Phone [phone]
Fax [phone]
E-mail: [e-mail]

www.knf.de

Product centre for fluid
pumps:

Switzerland

KNF FLODOS AG

Wassermatte 2
CH-6210 Sursee
Phone [phone]
Fax [phone]
E-mail: [e-mail]

www.knf-flodos.ch

Product centre for micro
pumps:

Switzerland

KNF Micro AG

Zelglimatte 1b
CH-6260 Reiden
Tel. [phone]
Fax [phone]
E-mail: [e-mail]

www.knf-micro.ch