KNF N 035 AVE, N 035 AN.9 E, N 035 ATE, N 035 AV.9 E, N 035 SNE Operating And Installation Instructions

Valid from : Aug. 2009

Diaphragm Vacuum Pumps and Compressors

N 035 ANE
N 035 AN.9 E
N 035 ATE
N 035 AVE
N 035 AV.9 E
N 035 SNE
N 035 STE
N 035 ST.9 E
N 035 SVE

Operating and
installation
instructions

Read and observe these
operating and installation
instructions!

N 035.1 ANE
N 035.1 AN.9 E
N 035.1 ATE
N 035.1 AT.9 E
N 035.1 AVE
N 035.2 ANE
N 035.2 AN.9 E
N 035.2 ATE
N 035.2 AVE
N 035.3 ANE
N 035.3 ATE
N 035.3 AVE

N 035.1 SNE
N 035.1 STE
N 035.1 SVE
N 035.2 SNE
N 035.2 STE
N 035.2 SVE
N 035.3 SNE
N 035.3 STE
N 035.3 SVE

KNF Neuberger GmbH
Alter Weg 3
D-79112 Freiburg

Germany
Phone [phone] / 5909-0

Fax [phone] / 5909-99
E-mail: [e-mail]

www.knf.de

KNF N 035 E e 08/09
Translation of the original Operating and installation instructions Keep for future use!

Contents Page

1.

About this document................................................................. 2

2. Use........................................................................................... 3

3. Safety ....................................................................................... 4

4. Technical Data ......................................................................... 5

5. Design and Function ................................................................ 9

6. Installation and connection..................................................... 12

7. Operation................................................................................ 19

8. Servicing................................................................................. 21

9. Troubleshooting...................................................................... 28

10. Spare parts and accessories.................................................. 30

11. Decontamination Declaration................................................. 32

Diaphragm Pump N 035 E About this document

1. About this document

1.1. Using the Operating and installation instruc­tions

The operating and installation instructions are part of the pump.
 Pass on the operating and installation instructions to the next

owner.

Project pumps

Customer-specific project pumps (pump models which begin with
“PJ” or “PM”) may differ from the operating and installation instruc­tions.

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

tions.

1.2. Symbols and Markings

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

Danger levels

Signal word Meaning Consequences if not observed

DANGER

WARNING

CAUTION

Tab. 1

Other information and symbols

Warning, indicates the danger level.
 Measures for avoiding the danger and its con-

sequences are specified here.

warns of immedi­ate danger

warns of possible
danger

warns of a possibly
dangerous situa­tion

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

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

Minor injuries or damage are
possible.

 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.

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 2

Diaphragm Pump N 035 E Use

2. Use

2.1. Proper use

The pumps are exclusively intended for transferring gases and
vapors.

Owner's responsibility

Operating parameters and

conditions

Requirements for

transferred medium

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

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, structured diaphragm and valves with the medium.

If combustible media are used: Hazard of fires and explosions due
to excessively high media temperature:

 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 suffi-

ciently 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
(Chapter 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.
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.

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 3

Diaphragm Pump N 035 E Safety

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 and installation instructions, at all
times.

Personnel

Working in a safety-

conscious manner

Handling dangerous media

Environmental protection

Standards

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 and installation instructions, and in particular the "Safety"
chapter.

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

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

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.

The pumps conform to the safety regulations of the EC Low Volt­age Directive 2006/95 EC, and the EC Directive 2004/108 EC
concerning Electromagnetic Compatibility.

The following harmonized standards have been used:

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

Tab. 2

Customer service and

repairs

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 4

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

Use only genuine parts from KNF for servicing work.

Diaphragm Pump N 035 E Technical Data

4. Technical Data

Pump materials

Material* Pump type
Pump head Diaphragm Valve Gasket

N 035 ANE
N 035 AN.9 E
N 035.1 ANE
N 035.1 AN.9 E
N 035.2 ANE
N 035.2 AN.9 E
N 035.3 ANE
N 035 ATE
N 035.1 ATE
N 035.1 AT.9 E
N 035.2 ATE
N 035.3 ATE
N 035 AVE
N 035 AV.9 E
N 035.1 AVE
N 035.2 AVE
N 035.3 AVE
N 035 SNE
N 035.1 SNE
N 035.2 SNE
N 035.3 SNE
N 035 STE
N 035 ST.9 E
N 035.1 STE
N 035.2 STE
N 035.3 STE
N 035 SVE
N 035.1 SVE
N 035.2 SVE
N 035.3 SVE

Aluminium CR Stainless Steel CR

Aluminium PTFE-coated Stainless Steel FPM

Aluminium FPM Stainless Steel FPM

Stainless Steel CR CR -

Stainless Steel PTFE-coated PTFE -

Stainless Steel FPM FPM -

Tab. 3 *according to DIN ISO 1629 und 1043.1

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 5

Diaphragm Pump N 035 E Technical Data

Pneumatic values

Pump type Delivery rate* (l/min)

at atm. pressure

N 035 ANE IP20
N 035 AN.9 E IP20
N 035 ANE IP44
N 035 AN.9 E IP44

30

N 035 ANE IP44 3 phase
N 035 SNE IP20
N 035 SNE IP44
N 035 ATE IP20
N 035 ATE IP44
N 035 STE IP20
N 035 STE IP44

27

N 035 ST.9 E IP44
N 035 STE IP44 3 phase
N 035 AVE IP20
N 035 AVE IP44
N 035 AV.9 E IP44
N 035 AVE IP44 3 phase

30

N 035 AV.9 E IP44 3 phase
N 035 SVE IP20
N 035 SVE IP44
N 035.1 ANE IP 20
N 035.1 AN.9 E IP 20
N 035.1 ANE IP 44
N 035.1 AN.9 E IP 44
N 035.1 ANE IP 44 3 phase
N 035.1 AVE IP 20
N 035.1 AVE IP 44
N 035.1 AVE IP 44 3 phase

55 - 100

N 035.1 SNE IP 20
N 035.1 SNE IP 44
N 035.1 SNE IP 44 3 phase
N 035.1 SVE IP 20
N 035.1 SVE IP 44
N 035.1 SVE IP 44 3 phase
N 035.1 ATE IP 20
N 035.1 ATE IP 44
N 035.1 AT.9 E IP 44
N 035.1 ATE IP 44 3 phase

49.5 - 100

N 035.1 STE IP 20
N 035.1 STE IP 44

Tab. 4 (part 1) *Liters in standard state (1,013 mbar)

Max. permissible
operating pressure (bar)

4

4

2

Ultimate vacuum
(mbar abs.)

100

100

100

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 6

Diaphragm Pump N 035 E Technical Data

Pump type

N 035.2 ANE IP 20
N 035.2 ANE IP 44
N 035.2 AN.9 E IP 44
N 035.2 ANE IP 44 3 phase
N 035.2 SNE IP 20
N 035.2 SNE IP 44
N 035.2 ATE IP 20
N 035.2 ATE IP 44
N 035.2 STE IP 20
N 035.2 STE IP 44
N 035.2 AVE IP 20
N 035.2 AVE IP 44
N 035.2 AVE IP 44 3 phase
N 035.2 SVE IP 20
N 035.2 SVE IP 44
N 035.3 ANE IP 20
N 035.3 ANE IP 44
N 035.3 ANE IP 44 3 phase
N 035.3 AVE IP 20
N 035.3 AVE IP 44
N 035.3 SNE IP 20
N 035.3 SNE IP 44
N 035.3 SVE IP 20
N 035.3 SVE IP 44
N 035.3 SVE IP 44 3 phase
N 035.3 ATE IP 44
N 035.3 STE IP 44

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

55 4 -

49.5 4 -

55 2 -

30 - 13

27 - 20

Tab. 4 (part 2) *Liters in standard state (1,013 mbar)

Max. permissible operat­ing pressure (bar)

Ultimate vacuum
(mbar abs.)

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 7

Diaphragm Pump N 035 E Technical Data

Electrical data

Parameter Value one-

headed pumps

Voltage / Frequency of

230 V / 50 Hz 230 V / 50 Hz

Value two­headed pumps

AC motor
Voltage / Frequency of
3 phase motor

230/400 V
50 Hz

230/400 V

50 Hz
Power IP20 version 220 W 300 W
Power IP44 version capacitor

230 W 320 W

motor
Power IP 44 version 3 phase

250 W 280 W

motor
Operating current

1 A 1.55 A

IP20 version
Operating current

1.7 A 1.90 A

IP44 version
Operating current IP44 ver-

1.7 A/1.0 A 2.1 A / 1.05 A

sion threephase motor
Protection class* IP20 / IP44 IP 20 / IP 44

Tab. 5 * see type plate

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

Other parameters

Parameter Values
Permissible

ambient temperature

+ 5 °C to + 40 °C

Permissible media temperature + 5 °C to + 40 °C
Gas-tightness of pump head

ca. 6 x 10-3 mbar l/s
(leak rate)* for all pumps except
.9 versions (not tested)

Gas-tightness of pump head

< 6 x 10-3 mbar l/s
(leak rate)* for N 035_ _.9 E

Tab. 6

* After opening pump head or replacing the diaphragm and reed valves (or

valve plate) the gas tightness is no longer guaranteed. A leak test is able
to verify that the original standard of gas-tightness has been achieved.

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 8

Diaphragm Pump N 035 E Design a nd Function

5. Design and Function

Design N 035 A__E (IP20)

1 Pneumatic pump outlet
2 Pneumatic pump inlet
3 Electrical Connection
4 Motor

1 Pneumatic pump outlet
2 Pneumatic pump inlet
3 Terminal box (electrical

connetion)

4 Motor

Fig. 1: Diaphragm Pump N 035 ANE (IP20)

Design N 035 A__E (IP44)

Fig. 2: Diaphragm Pump N 035 ANE (IP44)

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 9

Diaphragm Pump N 035 E Design a nd Function

Fig. 3: Pneumatic connection of two-headed pumps

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 10

Diaphragm Pump N 035 E Design a nd Function

Function diaphragm pump

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

Fig. 4: 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.

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 11

Diaphragm Pump N 035 E Installation and connection

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.

Mounting dimensions

 Mounting dimensions (see figs. 5 to 16).

Fig. 5: Mounting dimensions N 035 A_E (IP20) including .9 versions

(All dimensional tolerances conform to DIN ISO 2768-1,
Tolerance Class V)

Fig. 6: Mounting dimensions N 035 A_E (IP44) including .9 versions

(All dimensional tolerances conform to DIN ISO 2768-1,
Tolerance Class V)

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 12

Diaphragm Pump N 035 E Installation and connection

Fig. 7: Mounting dimensions N 035 S_E (IP20)

(All dimensional tolerances conform to DIN ISO 2768-1,
Tolerance Class V)

Fig. 8: Mounting dimensions N 035 S_E (IP44) including .9 versions

(All dimensional tolerances conform to DIN ISO 2768-1,
Tolerance Class V)

Fig. 9: Mounting dimensions N 035.1 A_E (IP20) and N 035.3 A_E (IP20)

including .9 versions (All dimensional tolerances conform to DIN
ISO 2768-1, Tolerance Class V)

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 13

Diaphragm Pump N 035 E Installation and connection

Fig. 10: Mounting dimensions N 035.1 A_E (IP44) and N 035.3 A_E (IP44)

including .9 versions (illustration without pneumatic connection; all
dimensional tolerances conform to DIN ISO 2768-1, Tolerance
Class V)

Fig. 11: Mounting dimensions N 035.2 A_E (IP20)

(All dimensional tolerances conform to DIN ISO 2768-1,
Tolerance Class V)

Fig. 12: Mounting dimensions N 035.2 A_E (IP44) including .9 versions

(All dimensional tolerances conform to DIN ISO 2768-1,
Tolerance Class V)

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 14

Diaphragm Pump N 035 E Installation and connection

Fig. 13: Mounting dimensions N 035.1 S_E (IP20) and N 035.3 S_E (IP20)

(illustration without pneumatic connection; all dimensional toler­ances conform to DIN ISO 2768-1, Tolerance Class V)

Fig. 14: Mounting dimensions N 035.1 S_E (IP44) and N 035.3 S_E (IP44)

(All dimensional tolerances conform to DIN ISO 2768-1,
Tolerance Class V)

Fig. 15: Mounting dimensions N 035.2 S_E (IP20)

(illustration without pneumatic connection; all dimensional toler­ances conform to DIN ISO 2768-1,Tolerance Class V)

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 15

Diaphragm Pump N 035 E Installation and connection

Fig. 16: Mounting dimensions N 035.2 S_E (IP44)

(All dimensional tolerances conform to DIN ISO 2768-1,
Tolerance Class V)

Cooling air supply

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

cooling air.

Installation location

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

protected against rain, splash, hose and drip water.

 Install the pump at the highest point in the system to prevent

condensate from collecting in the pump head.

 Protect the pump from dust.
 Protect the pump from vibrations and jolts.

6.2. Electrical connection

Extreme danger from electrical shock
 Only have the pump connected by an authorized

specialist.

DANGER

 When connecting the device to a power source, the relevant

standards, directives, regulations, and technical standards
must be observed.

 In the electrical installation, arrangements (complying with EN

60335-1) must be made for disconnecting the pump motor
from the electrical supply.

 Only have the pump connected when the power

supply is disconnected.

 KNF recommends that a fuse is installed in the motor supply

circuit (overcurrent release).

 For operating current see type plate or data sheet.

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 16

Diaphragm Pump N 035 E Installation and connection

Connecting pump

1. Compare the supply data with the data on the motor-plate. For
operating current see type plate.

The voltage must not vary by more than + 10% and - 10%
from that shown on the type-plate.

2. For IP 44 versions: open terminal box cover.

3. All pumps except versions with 3 phase motor: Connect the
mains cables to the connections L1 and N of the pump motor.

4. Connection of pumps with 3 phase motor according to figs. 17
or 18.

5. Connect the earth (ground) wire to the motor.

6. For IP 44 versions: close the terminal cover box.

Fig. 17: Y-Connection (high voltage)

Fig. 18: ∆-Connection (low voltage)

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 17

Diaphragm Pump N 035 E Installation and connection

6.3. Pneumatic connection

Connected components

Pump exhaust

 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.

Connecting pump

A marking on the pump head shows the direction of flow. For
two-headed pumps fig. 3 shows the pneumatic connections.

1. Remove the protective plugs from the hose connection
threads.

2. The assecorries silencer, filter, and hose connectors (where
applicable) are screwed into the port threads.

If the pump is used as a vacuum pump (not permitted with
series N 035.2), mount the silencer at the pressure side if
necessary. If the pump is used a compressor (not permitted
with series N 035.1 and N 035.3), mount the filter at the suc­tion side if necessary.

3. Connect the suction line and pressure line (thread size G ¼)

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

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 18

Diaphragm Pump N 035 E Operation

7. Operation

 Only operate the pump under the operating parameters and

conditions described in chapter 4, Technical data.

 Make sure the pumps are used properly (see section 2.1).
 Make sure the pumps are not used improperly (see section

2.2).

 Observe the safety precautions (see chapter 3).

Hazard of the pump head bursting due to excessive
pressure increase

 Do not exceed max. permissible operating

WARNING

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.

Pump standstill

 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 suctions sides 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.

For pumps with thermo switch (special design):

Automatic starting can cause personal injury and
pump damage

When the operation of the pump is interrupted by

WARNING

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

 Take all necessary care to prevent this leading

to a dangerous situation.

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 19

Diaphragm Pump N 035 E Operation

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.

 Make sure that no pressure is present in the lines during

switch-on.

Switching off the pump

 KNF recommends: When transferring aggressive media, flush

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

 Open pressure and suction lines to normal atmospheric pres-

sure.

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 20

Diaphragm Pump N 035 E Servicing

8. Servicing

8.1. Servicing Schedule

Component Servicing interval
Pump Regular inspection for external damage or

leaks

Diaphragm and
valve plates or reed
valves

Silencer/filter (ac­cessory)

Tab. 7

8.2. Cleaning

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

8.2.1. Flushing Pump

Replace at the latest, when pump output
decreases

Change if it is dirty

When transferring aggressive media, flush the pump under atmos­pheric conditions some minutes with air (or, if necessary for safety
reasons, with an inert gas) prior to switch-off to increase the ser­vice life of the diaphragm.

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.

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 21

Diaphragm Pump N 035 E Servicing

8.3. Changing Diaphragm and Valves

8.3.1. Pumps with aluminium head

N 035 ANE N 035.1 ANE N 035.2 ANE N 035.3 ANE
N 035 AN.9 E N 035.1 AN.9 E N 035.2 AN.9 E N 035.3 ATE
N 035 ATE N 035.1 ATE N 035.2 ATE N 035.3 AVE
N 035 AVE N 035.1 AT.9 E N 035.2 AVE
N 035 AV.9 E N 035.1 AVE

Conditions

Spare parts

Tools

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

socket

 Pump is clean and free of hazardous materials

Spare part* Position** Quantity per pump head
Diaphragm (F) 1
Countersunk

(D) 1

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

Tab. 8 * According to Spare parts list, chapter 10

** According to Fig. 19

***Not for .9 versions

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
1 Adjustable pin–wrench for two-hole nuts or KNF

wrench for retainer plate (see accessory, section 10)
(only for .9 versions)

Tab. 9

Information on procedure

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.

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 22

Diaphragm Pump N 035 E Servicing

Health hazard due to dangerous substances
in the pump!

Depending on the substance transferred, caustic

WARNING

burns or poisoning are possible.
 Wear protective clothing if necessary, e.g.

protective gloves.

 Flush pump before replacing the diaphragm and

reed valves (see section 8.2.1).

*

Fig. 19: Pump parts for versions with aluminium head

*not for .9 versions

1. For two-headed pumps:
At one pump head open the union nut of pneumatic head con­nection and pull off the tube.

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

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

4. For all pumps except .9 versions: Unscrew the countersunk
screw D, remove the retainer plate E and the diaphragm F.

5. For pumps N 035_ _.9 E: To undo the retainer plate E use the
wrench for retainer plate to turn it anti-clockwise; remove re­tainer plate and diaphragm F.

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 23

Diaphragm Pump N 035 E Servicing

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. For all pumps except .9 versions: Place the retainer plate E on
the diaphragm F and tighten the new countersunk screw D
(torque: 5.0 Nm).

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

9. For pumps N 035_ _.9 E: Place the retainer plate E on the
diaphragm F. Screw on the retainer plate E with the wrench for
retainer plate uniformly and diagonally (torque: 5.0 Nm).

10. Change lower reed valve:

− Undo the cheese head screw N and exchange the reed

valve M.

11. 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.

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

13. Turn the counterweight J to check that the pump run freely,
replace the cover plate H and secure it with the four screws G.

14. For two-headed pumps:
Carry out steps 2 to 13 for the second pump head.

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

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 24

Diaphragm Pump N 035 E Servicing

8.3.2. Pumps with stainless steel head

N 035 SNE N 035.1 SNE N 035.2 SNE N 035.3 SNE
N 035 STE N 035.1 STE N 035.2 STE N 035.3 STE

Conditions

Spare parts

Tools

Information on procedure

N 035 ST.9 E

N 035.1 SVE N 035.2 SVE N 035.3 SVE

N 035 SVE

 Motor disconnected from mains and de-energized
 Pump is clean and free of hazardous materials

Spare part* Position** Quantity per

pump head
Diaphragm (F) 1
Countersunk

(D) 1

screw***
Valve plate (Z) 1

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

** According to Fig. 20

***Not for .9 versions

Quantity Tools/Material
1 Allen key 4 mm
1 Allen key 5 mm
1 Screwdriver blade width 6.5
1 Pencil
1 Adjustable pin–wrench for two-hole nuts or KNF

wrench for retainer plate (see accessory, section 10)
(only for .9 versions)

Tab. 11

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

 Replace the diaphragm and valve plate of the individual pump

heads consecutively.

Health hazard due to dangerous substances
in the pump!

Depending on the substance transferred, caustic

WARNING

burns or poisoning are possible.
 Wear protective clothing if necessary, e.g.

protective gloves.

 Flush pump before replacing the diaphragm and

the valve plate (see section 8.2.1).

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 25

Diaphragm Pump N 035 E Servicing

*

Fig. 20: Pump parts for versions with stainless steel head

*not for .9 versions

1. For pumps N 035.1 S_E and N 035.3 S_E:
Pull the pneumatic head connection hose off one pump head.

2. For pumps N 035.2 S_E:
On the pneumatic connection, loosen the hose clip on one
pump head and pull the hose off.

3. Mark the position of the head plate W and intermediate plate X
in relation of the housing A with a pencil.

4. Loosen the four allen screws Y and remove the head plate
head W, valve plate Z and intermediate plate X.

5. For all pumps except .9 versions: Unscrew the countersunk
screw D, remove the retainer plate E and the diaphragm F.

6. For pumps N 035_ _.9 E: To undo the retainer plate E use the
wrench for retainer plate to turn it anti-clockwise; remove re­tainer plate and diaphragm F.

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

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

9. For all pumps except .9 versions: Place the ratainer plate E on
the diaphragm F and tighten the new countersunk screw D
(torque: 5.0 Nm).

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 26

Diaphragm Pump N 035 E Servicing

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

10. For pumps N 035_ _.9 E: Place the retainer plate E on the
diaphragm F. Screw on the retainer plate E with the wrench for
retainer plate uniformly and diagonally (torque: 5.0 Nm).

11. Place the intermediate plate X on the top of the diaphragm F
so that it corresponds to the marks on the housing.

12. Place the new valve plate Z on the intermediate plate X.

13. Place the head plate head W on the diaphragm F according to
the marks made previously and tighten the screws Y uniformly
and diagonally (torque: 10.0 Nm).

14. Turn the counterweight J to check that the pump run freely,
replace the cover plate H and secure it with the four screws G.

15. For two-headed pumps:
Carry out steps 3 to 14 for the second pump head.

16. For two-headed pumps:
Pull the pneumatic head connection hose back onto the hose
connector.

17. For pump type N 035.2 S_E:
Retighten the hose clip on the pneumatic head connection.

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 27

Diaphragm Pump N 035 E Troubleshooting

9. Troubleshooting

Extreme danger from electrical shock!
 Disconnect the pump power supply before working

on the pump.

DANGER

 Check the pump (see Tab. 12 and 13).

Pump does not transfer

Cause Fault remedy
No voltage in the power source

Connections or lines blocked.  Check connections and lines.

External valve is closed or filter
is clogged.

Condensate has collected in
pump head.

Diaphragm or reed valves
(valve plate) are worn.

Flow rate, pressure or vacuum too low

 Check room fuse and switch on if necessary.

 Remove blockage.
 Check external valves and filters.

 Flush pump (see Section 8.2.1).
 Install pump at highest point in system.
 Replace diaphragm and reed valves (valve plate), (see

Section 8.3).

Tab. 12

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

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.
There is gauge pressure on

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

Pneumatic lines or connection
parts have an insufficient cross
section.

Leaks occur on connections,
lines or pump head.

Connections or lines completely
or partially jammed.

Head parts are soiled.  Clean head components.
Diaphragm or reed valves

(valve plate) are worn.

 Flush pump (see Section 8.2.1).
 Install pump at highest point in system.

 Change the pressure conditions.

 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.

 Eliminate leaks.

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

 Replace diaphragm and reed valves (valve plate),

(see Section 8.3).

Tab. 13

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 28

Diaphragm Pump N 035 E Troubleshooting

Fault cannot be rectified

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

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

2. Remove the pump.

3. Clean the pump (see Section 8.2.2).

4. Send the pump to KNF with a filled out decontamination decla­ration (see chapter 11) and specification of the medium trans­ferred.

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 29

Diaphragm Pump N 035 E Spare parts and accessories

10. Spare parts and accessories

Spare parts

N 035 ANE, N 035.1 ANE, N 035.2 ANE, N 035.3 ANE

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

Tab. 14 * According to Fig. 19

N 035 AVE, N 035.1 AVE, N 035.2 AVE, N 035.3 AVE

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

Tab. 15 * According to Fig. 19

001312
110711
001328
001326

** Not for .9 versions

001405
110711
001328
011796

** Not for .9 versions

N 035 ATE, N 035.1 ATE, N 035.2 ATE, N 035.3 ATE

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

Tab. 16 * According to Fig. 19

001406
110711
001328
011796

** Not for .9 versions

N 035 SNE, N 035.1 SNE, N 035.2 SNE, N 035.3 SNE

Spare part Position* Order No.
Diaphragm (F)
Countersunk screw** (D)
Valve plate (Z)

Tab. 17 * According to Fig. 20

001312
110711
001308

** Not for .9 versions

N 035 SVE, N 035.1 SVE, N 035.2 SVE, N 035.3 SVE

Spare part Position* Order No.
Diaphragm (F)
Countersunk screw** (D)
Valve plate (Z)

Tab. 18 * According to Fig. 20

001405
110711
001404

** Not for .9 versions

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 30

Diaphragm Pump N 035 E Spare parts and accessories

N 035 STE, N 035.1 STE, N 035.2 STE, N 035.3 STE

Spare part Position* Order No.
Diaphragm (F)
Countersunk screw** (D)
Valve plate (Z) 001407

Tab. 19 * According to Fig. 20

001406
110711

** Not for .9 versions

Accessories

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

N 035 ANE 047601

4 bar
Fine control valve with pressure

gauge, pressure side
Fine control valve with vacuum

gauge, suction side

N 035 ANE
N 035.2 ANE

N 035 ANE
N 035.1 ANE

000482

000354

N 035.3 ANE

Hose connector G1/4
for tube ID 9

Hose connector stainless steel
G1/4

all

all

000362

020234

for tube ID 9
Wrench for retainer plate .9 versions 018812

Tab. 20

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 31

Diaphragm Pump N 035 E Decontamination Declaration

11. Decontamination Declaration

The condition for the repair of a pump by KNF is the certifica­tion of the customer on the transferred media and on the
cleaning of the pump (decontamination declaration).

 Copy this page.

KNF Neuberger GmbH
Alter Weg 3
D-79112 Freiburg

Germany
Tel. [phone]

Fax [phone]
E-mail: [e-mail]

www.knf.de

 Enter the pump model, the Serial No. and the transferred

media in the form below and sent the signed form together with
the flushed and cleaned pump to KNF Customer Service.

Customer decontamination declaration for
repair order

We herewith confirm that the following media have been pumped
with the pump listed below, and that the pump has been flushed
and cleaned.

Pump model

Serial No.

Fed media

The pump contains neither aggressive, biological, radioactive,
poisonous nor other dangerous media.

Company Date/Signature

KNF N 035 E e 08/09 Translation of the original Operating and installation instructions 32