KNF N035 AN.18 User manual

KNF 121228-121398 04/14
Translation of original Operating Instructions, englis Keep for future use!
Operating Instructions
Read and observe t ese 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
P one +49-(0)7664 / 5909-0
Fax [phone] / 5909-99
E-Mail: [email protected]
www.knf.de
Contents Page
1. About t is document ................................................................. 3
2. Use ............................................................................................ 4
3. Safety ........................................................................................ 5
4. Tec nical Data .......................................................................... 7
5. Design and Function ............................................................... 11
6. Installation and connection ...................................................... 13
7. Operation ................................................................................. 14
8. Servicing .................................................................................. 16
9. Troubles ooting ....................................................................... 20
10. Spare parts and accessories ................................................... 22
11. Returns .................................................................................... 23
12. Healt and safety clearance and decontamination form ......... 24

Diap ragm Pumps N 035.18 About t is document
Translation of original Operating instructions, englis , KNF 121228-121398 04/14 3
1. About this document
1.1. Using the Operating Instructions
T e Operating Instructions are part of t e pump.
 Carefully study t e Operating Instructions before using a
pump.
 Always keep t e Operating Instructions andy in t e work
area.
 Pass on t e Operating Instructions to t e next owner.
Customer-specific project pumps (pump models w ic begin wit
“PJ” or “PM”) may differ from t e Operating Instructions.
 For project pumps, also observe t e agreed upon specifica-
tions.
1.2. Symbols and arkings
Warning
WARNING
A danger warning is located ere.
Possible consequences of a failure to observe t e
warning are specified ere. T e signal word, e.g.
Warning, indicates t e danger level.
 Measures for avoiding t e danger and its conse-
quences are specified ere.
Danger levels
Signal word
Meaning Consequences if not observed
DANGER warns of immedi-
ate danger
Deat or serious injuries
and/or serious damage are t e
consequence.
WARNING warns of possible
danger
Deat or serious injuries
and/or serious damage are
possible.
CAUTION warns of a possibly
dangerous situa-
tion
Minor injuries or damage are
possible.
Tab. 1
Other information and symbols
 An activity to be carried out (a step) is specified ere.
1. T e first step of an activity to be carried out is specified ere.
Additional, consecutively numbered steps follow.
T is symbol refers to important information.
Project pumps

Use Diap ragm Pumps N 035.18
4 Translation of original Operating Instructions, englis , KNF 121228-121398 04/14
2. Use
2.1. Proper use
T e pumps are exclusively intended for transferring gases and
vapors.
Owner's responsibility
Only install and operate t e pumps under t e operating parameters
and conditions described in C apter 4, Tec nical data.
Make sure t at t e installation location is dry and t e pump is
protected against rain, splas , ose and drip water.
Before using a medium, c eck w et er t e medium can be trans-
ferred danger-free in t e specific application case.
Before using a medium, c eck t e compatibility of t e materials of
t e pump ead, diap ragm and valves wit t e medium.
Only transfer gases w ic remain stable under t e pressures and
temperatures occurring in t e pump.
2.2. Improper use
T e pumps may not be operated in an explosive atmosp ere.
T e pumps are not suitable for transferring dusts.
T e pumps are not suitable for transferring liquids.
Pumps designed to create eit er a vacuum or an overpressure
must not be used for t ese two purposes simultaneously.
An overpressure must not be applied to t e suction side of t e
pump.
Operating parameters and
conditions
Requirements for
transferred medium

Diap ragm Pumps N 035.18 Safety
Translation of original Operating instructions, englis , KNF 121228-121398 04/14 5
3. Safety
Note t e safety precautions in sections 6. Installation and
connection, and 7. Operation.
T e pumps are built according to t e generally recognized rules of
tec nology and in accordance wit t e occupational safety and
accident prevention regulations. Nevert eless, dangers can result
during t eir use w ic lead to injuries to t e user or ot ers, or to
damage to t e pump or ot er property.
Only use t e pumps w en t ey are in a good tec nical and proper
working order, in accordance wit t eir intended use, observing t e
safety advice wit in t e operating instructions, at all times.
Make sure t at only trained and instructed personnel or specially
trained personnel work on t e pumps. T is especially applies to
assembly, connection and servicing work.
Make sure t at t e personnel as read and understood t e operat-
ing instructions, and in particular t e "Safety" c apter.
Observe t e accident prevention and safety regulations w en
performing any work on t e pump and during operation.
Do not expose any part of your body to t e vacuum.
Open ousing parts wit notice sticker (see fig. 1) only after
separating mains plug from power source.
W en transferring dangerous media, observe t e safety regula-
tions w en andling t ese media.
Be aware t at t e pumps are not designed to be explosion-proof.
Make sure t e temperature of t e medium is always sufficiently
below t e ignition temperature of t e medium, to avoid ignition or
explosion. T is also applies for unusual operational situations.
Note t at t e temperature of t e medium increases w en t e pump
compresses t e medium.
Hence, make sure t e temperature of t e medium is sufficiently
below t e ignition temperature of t e medium, even w en it is
compressed to t e maximum permissible operating pressure of t e
pump. T e maximum permissible operating pressure of t e pump
is stated in t e tec nical specifications (see section 4).
If necessary, consider any external sources of energy, suc as
radiation, t at may add eat to t e medium.
In case of doubt, consult t e KNF customer service.
Store all replacement parts in a protected manner and dispose of
t em properly in accordance wit t e applicable environmental
protection regulations. Observe t e respective national and inter-
national regulations. T is especially applies to parts contaminated
wit toxic substances.
Personnel
Working in a safety-
conscious manner
Fig. 1: Notice sticker
Handling dangerous media
Handling flammable media
Environmental protection

Safety Diap ragm Pumps N 035.18
6 Translation of original Operating Instructions, englis , KNF 121228-121398 04/14
T e pumps conform to t e Directive 2011/65/EU (RoHS2).
T e pumps conform to t e safety regulations of t e EC Directive
2004/108/EG concerning Electromagnetic Compatibility and t e
EC Directive 2006/42/EG concerning Mac inery.
T e following armonized standards ave 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 ave repairs to t e pump carried out by t e KNF Customer
Service responsible.
Only aut orized personnel s ould open t ose parts of t e ousing
t at contain live electrical parts.
Use only genuine parts from KNF for servicing work.
Standards
Customer service and
repairs

Diap ragm Pumps N 035.18 Tec nical Data
Translation of original Operating instructions, englis , KNF 121228-121398 04/14 7
4. Technical Data
Pump materials
Pump type Material
Pump ead Diap ragm 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 * iters in standard state (1013 mbar)

Tec nical Data Diap ragm Pumps N 035.18
8 Translation of original Operating Instructions, englis , 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

Diap ragm Pumps N 035.18 Tec nical Data
Translation of original Operating instructions, englis , 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
T e pumps are fitted as standard wit a t ermal-switc to protect
against overloading.

Tec nical Data Diap ragm Pumps N 035.18
10 Translation of original Operating Instructions, Englis , 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 umidity
80 % for temperatures up
to 31°C, decreasing linear-
ly 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

Diap ragm Pumps N 035.18 Design and Function
Translation of original Operating Instructions, Englis , 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 Switc
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 Switc
4 Pneumatic ead connection 1
5 Handle
6 Pneumatic ead connection 2
Fig. 3: Diaphragm Pump N 035.1.2 AN.18

Design and Function Diap ragm Pumps N 035.18
12 Translation of original Operating Instructions, Englis , KNF 121228-121398 04/14
Design N 035.3 A_.18
1 Pneumatic pump outlet
2 Pneumatic pump inlet
3 On/Off Switc
4 Handle
5 Pneumatic ead 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 c amber
4 Diap ragm
5 Eccentric
6 Connecting rod
7 Pump drive
Fig. 5: Pump head
T e pump transfers, compresses (depending on pump version)
and evacuates gases and vapors.
T e elastic diap ragm (4) is moved up and down by t e eccentric
(5) and t e connecting rod (6). In t e downward stroke it aspirates
t e gas to be transferred via t e inlet valve (2). In t e upward
stroke, t e diap ragm presses t e medium out of t e pump ead
via t e outlet valve (1). T e transfer c amber (3) is ermetically
separated from t e pump drive (7) by t e diap ragm.

Diap ragm Pumps N 035.18 Installation and connection
Translation of original Operating Instructions, Englis , KNF 121228-121398 04/14 13
6. Installation and connection
Only install and operate t e pumps under t e operating parameters
and conditions described in c apter 4, Tec nical data.
Observe t e safety precautions (see c apter 3).
6.1. Installation
 Before installation, store t e pump at t e installation location to
bring it up to room temperature.
 See c apter 4, Tec nical data, for t e dimensions of pump.
 Install t e pump so t at t e motor fan can intake sufficient
cooling air.
 Make sure t at t e installation location is dry and t e pump is
protected against rain, splas , ose and drip water.
 C oose a safe location (flat surface) for t e pump.
 Protect t e pump from dust.
 Protect t e pump from vibrations and jolts.
6.2. Connection
 Only connect components to t e pump w ic are designed for
t e pneumatic data of t e pump (see section 4).
 If t e pump is used as a vacuum pump, safely disc arge t e
pump ex aust at t e pump’s pneumatic outlet.
A marking on t e pump ead s ows t e direction of flow.
1. Remove t e protective plugs from t e pneumatic connectors of
t e pump.
2. Mount accessory silencer/filter (w ere applicable):
If t e pump is used as a vacuum pump, mount t e silencer at
t e pressure side if necessary. If t e pump is used as a com-
pressor (not permitted wit series N 035.3) mount t e filter at
t e suction side if necessary.
− Unscrew corresponding ose connector from pump ead.
− Screw silencer/filter into pump ead.
3. Connect t e suction line and pressure line (tube inner diameter
9 mm).
4. Lay t e suction and pressure line at a downward angle to
prevent condensate from running into t e pump.
5. Insert t e power cable’s plug into a properly installed
s ockproof socket.
Dimensions
Cooling air supply
Installation location
Connected components
Pump ex aust
Connection

Operation Diap ragm Pumps N 035.18
14 Translation of original Operating Instructions, Englis , KNF 121228-121398 04/14
7. Operation
7.1. Preparing for Start-up
Before switc ing on t e pump, observe t e following points:
Operational requirements
Pump All oses attac ed properly
Fan openings not blocked
Specifications of t e power supply correspond wit t e
data on t e pump’s type plate.
T e pump outlet is not closed or constricted.
Tab. 9
7.2. Starting
 Only operate t e pump under t e operating parameters and
conditions described in c apter 4, Tec nical data.
 Make sure t e pump is used properly (see section 2.1).
 Make sure t e pump is not used improperly (see section 2.2).
 Observe t e safety precautions (see c apter 3).
WARNING
Hazard of t e pump ead bursting due to excessive
pressure increase
 Do not exceed max. permissible operating
pressure (see section 4).
 Monitor pressure during operation.
 If t e pressure exceeds t e maximum permissi-
ble operating pressure, immediately s ut down
pump and eliminate fault (see c apter 9. Trou-
bles ooting).
 Only t rottle or regulate t e air
or gas quantity in
t e suction line to prevent t e maximum permis-
sible operating pressure from being exceeded.
 If t e air or gas quantity in t e pressure line is
t rottled or regulated, make sure t at t e maxi-
mum permissible operating pressure of t e
pump is not exceeded.
Excessive pressure (wit all of t e related azards) can be
prevented by placing a bypass line wit a pressure-relief valve
between t e pressure and suction side of t e pump. For furt er
information, contact our tec nical adviser.
 Wit t e pump at a standstill, open pressure and suction lines
to normal atmosp eric pressure.
Pump standstill

Diap ragm Pumps N 035.18 Operation
Translation of original Operating Instructions, Englis , KNF 121228-121398 04/14 15
WARNING
Automatic starting can cause personal injury and
pump damage
W en t e operation of t e pump is interrupted by t e
t ermal switc , t e pump will restart automatically
after cooling down.

After triggering of t e t ermal protection or in t e
event of power failure, remove t e pump’s mains
plug from t e socket so t at t e pump cannot
start uncontrollably.
 Attempt work on t e pump only if t e pump is
separated from mains power.
7.3. Switching pump on and off
Switching pump on
T e pump may not start up against pressure or vacuum during
switc -
on. T is also applies in operation following a brief power
failure. If a pump starts against pressure, it may block. T is
activates t e t ermal switc , and t e pump switc es off.
 Make sure t at no pressure or vacuum is present in t e lines
during switc -on.
 Switc on pump wit mains switc (see fig. 2, 3 or 4, position
3).
Switching off the pump/removing from operation
 W en transferring aggressive media, flus t e pump prior to
switc -off to increase t e service life of t e diap ragm (see
section 8.2.1).
 Switc off pump wit mains switc (see fig. 2, 3 or 4, position
3).
 Open pressure and suction lines to normal atmosp eric pres-
sure.

Servicing Diap ragm Pumps N 035.18
16 Translation of original Operating Instructions, Englis , KNF 121228-121398 04/14
8. Servicing
8.1. Servicing Schedule
Component Servicing interval
Pump Regular inspection for external damage or
leaks
Diap ragm, reed
valves (valve plate)
Replace at t e latest, w en pump output
decreases
Silencer/filter (ac-
cessory)
C ange if it is dirty
Tab. 10
8.2. Cleaning
W en cleaning, make sure t at no liquids enter t e inside of
t e ousing.
8.2.1. Flushing Pump
 Before switc ing off t e pump, flus it wit air (if neccesary for
safety reasons: wit an inert gas) for about five minutes under
atmosp eric conditions (ambient pressure).
8.2.2. Cleaning Pump
 Only use solvents for cleaning if t e ead materials cannot be
attacked (c eck t e resistance of t e material!).
 If compressed air is available, blow out t e components.

Diap ragm Pumps N 035.18 Servicing
Translation of original Operating Instructions, Englis , KNF 121228-121398 04/14 17
8.3. Changing Diaphragm and Valves
 Pump is switc ed off and mains plug is removed from t e
socket
 Pump is clean and free of azardous materials
 Tubes removed from pump’s pneumatic inlet and outlet
Spare part*
Position** Quantity per
pump ead
Diap ragm (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 widt 6.5
1 Screwdriver blade widt 4.0
1 Fork wrenc 16 mm (only for two- eaded pumps)
1 Pencil
Tab. 12
Wit multi- ead pumps, parts of t e individual pump eads can be
confused.
 Replace t e diap ragm and reed valves of t e individual pump
eads consecutively.
WARNING
Healt azard due to dangerous substances
in t e pump!
Depending on t e substance transferred, caustic
burns or poisoning are possible.
 Wear protective clot ing if necessary, e.g.
protective gloves.
 Flus pump before replacing t e diap ragm and
redd valves (see section 8.2.1).
Conditions
Spare parts
Tools
Information on procedure

Servicing Diap ragm Pumps N 035.18
18 Translation of original Operating Instructions, Englis , KNF 121228-121398 04/14
Fig. 6: Pump parts for versions with aluminium head
1. For pumps N 035.1.2 A_.18:
On bot pneumatic ead connections, open t e ead connec-
tion union nut on one pump ead and pull t e ose off.
2. For pumps N 035.3 A_.18:
At one pump ead open t e union nut of pneumatic connection
and pull off t e tube.
3. Mark t e position of t e diap ragm ead C in relation of t e
ousing A wit a pencil.
4. Loosen t e four allen screws B and remove t e diap ragm
ead C.
5. Unscrew t e countersunk screw D, remove t e retainer plate E
and t e diap ragm F.
6. Loosen t e four screws G and remove t e cover plate H.
7. Turn t e counterweig t J so t at t e connection rod K is in t e
mid-position; fit t e new diap ragm F.
8. Place t e retainer plate E on t e diap ragm F and carefully but
formly tig ten t e new countersunk screw D (torque: 5.0 Nm).
T e self-locking screw D can only be used once.

Diap ragm Pumps N 035.18 Servicing
Translation of original Operating Instructions, Englis , KNF 121228-121398 04/14 19
9. C ange lower reed valve:
− Undo t e c eese ead screw N and exc ange t e reed
valve M.
10. C ange upper reed valve:
− Loosen t e allen screws S, remove t e cover plate T and
t e gasket V.
− Undo t e c eese ead screw U and exc ange t e reed
valve P; tig ten t e c eese ead screw U.
− Replace t e cover plate T wit a new gasket V and tig ten
t e allen screws S.
11. Place t e diap ragm ead C according to t e marks made
previously and tig ten t e screws B uniformly and diagonally
(torque: 10.0 Nm).
12. Turn t e counterweig t J to c eck t at t e pump run freely.
13. For two- eaded pumps:
Carry out steps 3 to 12 for t e second pump ead.
14. Replace t e cover plate H and secure it wit t e four screws G.
15. For two- eaded pumps:
Reattac t e tube of pneumatic ead connection onto t e ose
connector and tig ten t e union nut.
For N 035.1.2 A_.18 pumps, t is applies to bot pneumatic
ead connections.

Troubles ooting Diap ragm Pumps N 035.18
20 Translation of original Operating Instructions, Englis , KNF 121228-121398 04/14
9. Troubleshooting
DANGER
Extreme danger from electrical s ock!

Disconnect t e pump power supply before working
on t e pump.
 Make sure t e pump is de-energized and secure.
 C eck t e pump (see Tab. 13 to 16).
Pump does not transfer
Cause Fault remedy
No voltage in t e power source  C eck room fuse and switc on if necessary.
T ermal switc as operated
following to over- eating.
 Disconnect pump from mains.
 Allow pump to cool.
 Trace cause of over- eating and eliminate it.
Connections or lines blocked.  C eck connections and lines.
 Remove blockage.
External valve is closed or filter
is clogged.
 C eck external valves and filters.
Condensate as collected in
pump ead.
 Detac t e condensate source from t e pump.
 Flus pump (see Section 8.2.1).
Diap ragm or reed valves
(valve plate) are worn.
 Replace diap ragm and reed valves (valve plate), (see
Section 8.3).
Tab. 13
Flow rate, pressure or vacuum too low
T e pump does not ac ieve t e output specified in t e Tec nical data or t e data s eet.
Cause Fault remedy
Condensate as collected in
pump ead.
 Detac t e condensate source from t e pump.
 Flus pump (see Section 8.2.1).
T ere is gauge pressure on
pressure side and at t e same
time vacuum or a pressure
above atmosp eric pressure on
suction side.
 C ange t e pressure conditions.
Pneumatic lines or connection
parts ave an insufficient cross
section.
 Disconnect pump from system to determine output values.
 Eliminate t rottling (e.g. valve) if necessary.
 Use lines or connection parts wit larger cross section if
necessary.
Leaks occur on connections,
lines or pump ead.
 C eck t at tubes sit correctly on ose nozzles.
 Replace leaky tubes.
 Eliminate leaks.
Connections or lines completely
or partially jammed.
 C eck connections and lines.
 Remove t e jamming parts and particles.
Head parts are soiled.  Clean ead components.
Diap ragm or reed valves
(valve plate) are worn.
 Replace diap ragm and reed valves (valve plate),
(see Section 8.3).