ProMinent Pneumados PNDb Series User manual

Part. No. 986573 ProMinent Dosiertechnik GmbH ·69123 Heidelberg ·Germany BA PN 002 07/07 GB
Please completely read through operating instructions! •Do not discard!
The operator shall be liable in case of damages due to improper installation or operation!
Operating Instructions
Metering pump Pneumados PNDb
ProMinent
®
BA_PN_002_07_07_GB.p65 30.07.2007, 8:07 Uhr1
ООО "ПромХимТех" - дистрибьютор исервисный партнер ProMinent
www.promhimtech.ru / [email protected]

ProMinent® Page 2
Corporate information:
Operating Instructions
Metering pump Pneumados PNDb
© ProMinent Dosiertechnik GmbH, 2007
Address:
ProMinent Dosiertechnik GmbH
Im Schuhmachergewann 5-11
69123 Heidelberg ·Germany
Phone no.: [phone]
Fax: [phone]
[e-mail]
www.prominent.com
Technical changes reserved.
Corporate information
BA_PN_002_07_07_GB.p65 30.07.2007, 8:07 Uhr2

ProMinent®Page 3
Page
1Preamble ...................................................................................................................... 4
2Function ....................................................................................................................... 5
2.1 Functional principle ....................................................................................................... 5
2.2 Pump drive .................................................................................................................... 5
2.3 Delivery unit ................................................................................................................... 5
2.4 Pump control .................................................................................................................5
2.4.1 Electrical-pneumatic control ......................................................................................... 6
3Technical data .............................................................................................................. 7
4Accessories ................................................................................................................. 8
5Notes on safety............................................................................................................ 8
6Identcode ..................................................................................................................... 9
7 Unpacking .................................................................................................................... 10
8Dimension sheet .......................................................................................................... 11
9Assembly / installation ................................................................................................ 12
9.1 Requirements on the compressed-air supply ............................................................... 12
9.2 Assembly of the Pneumados metering pump ............................................................... 12
9.3 Pneumatic connection .................................................................................................. 12
9.4 Connection of the suction and metering line ................................................................ 12
9.5 Installation examples..................................................................................................... 14
9.5.1 Correct installation ........................................................................................................ 15
9.5.2 Incorrect installation ...................................................................................................... 18
10 Operation ..................................................................................................................... 19
10.1 Operation for SS version ............................................................................................... 19
10.2 Operation for PV version ............................................................................................... 19
11 Maintenance ................................................................................................................ 20
12 Troubleshooting / Remedy ......................................................................................... 20
12.1 Pump works, but no metering ....................................................................................... 20
12.2 Pump does not perform any suction despite full stroke movement and venting ......... 21
12.3 Metering stroke is not completed although an air pressure of 6 bar is present............ 21
12.4 Liquid leaks at the end disc .......................................................................................... 21
12.5 Replacement of the metering diaphragms .................................................................... 22
13 Repair ........................................................................................................................... 24
14 Disposal of used parts ................................................................................................ 25
EC Declaration of Conformity .................................................................................... 26
Annex ............................................................................................................................ 27
Pump Section .............................................................................................................. 27
Clearance form ............................................................................................................ 28
Device overview / Controls ........................................................................................ 32
Contents
BA_PN_002_07_07_GB.p65 30.07.2007, 8:07 Uhr3

ProMinent® Page 4
General notes for the user / Preamble
General notes for the user
Please read the following user guidelines. Familiarity with these points ensures optimum use of
the operating instructions.
Key points in the text are indicated as follows:
•Enumerations
Instructions
Working guidelines
NOTES
A note is to facilitate your work.
and safety guidelines:
WARNING
Characterizes a possibly hazardous situation.
Your life may be in danger and serious injuries may result if these notes are disregarded.
CAUTION
Characterizes a possibly hazardous situation.
There is danger of personal injury and damage to property if these notes are disregarded.
IMPORTANT
Characterizes a possibly endangering situation.
There is danger of damage to property if these notes are disregarded.
1Preamble
ProMinent®Pneumados is a pneumatically-operated metering pump.
In contrast to solenoid-driven metering pumps, the metering stroke of this pump is effected by a
pneumatically actuated diaphragm, the suction stroke by spring force.
The delivery capacity can be varied via the stroke frequency and the stroke length setting.
Metering strokes The external electrically-pneumatically or pneumatically activated compressed air valves facilitate
a setting of up to 180 metering strokes per minute.
Stroke length The stroke length and thus the stroke volume can be set between 10 and 100%.
Areas of application Typical areas of application are:
•Feeding stuff treatment -
Metering and spraying of feeding stuff with flavouring agents
•Painting plants -
Metering of coagulants
•Greenhouses -
For metering of fertilisers and minerals compounds
•Car wash -
Metering of cleaning agents, shampoo, brighteners, wax, drying agents as well as for the
treatment of recycling water via metering of flocculants, pH adjusters, defoaming agents,
and emulsion breakers
•in all plants with central control (e.g. PLC) and compressed air supply
BA_PN_002_07_07_GB.p65 30.07.2007, 8:07 Uhr4

ProMinent®Page 5
Function
2Function
Capacity range ProMinent®Pneumados is a pneumatically operated metering pump with a capacity range from
max. 0.76 to 16.7 l/h at a max. backpressure of 16 –2 bar.
Compressed air consumption The compressed air consumption amounts to approx. 47 l/min at 6 bar, preferably non-oiled or
also oiled compressed air.
2.1 Functional principle
Pressure stroke Compressed air is applied to the pressure chamber within the housing via an external pneumatic
valve. This displaces a pneumatic diaphragm and the resulting axial movement is transferred to
the metering diaphragm via a tappet. This diaphragm impulsively expels the metering medium
from the liquid end through the pressure valve and the balls on the suction side close.
Suction stroke The pneumatic valve having switched, the pressure chamber is relieved and the tappet together
with the metering diaphragm is restored to its original position through the spring. The medium is
sucked into the liquid end through the suction valve and the balls on the pressure side are closed.
2.2 Pump drive
The Pneumados pump drive is operated solely pneumatically with a continuous max. stroke
frequency of 180 strokes/min.
The metering stroke is set to 10 - 100% using a stroke length adjustment (10).
The stroke length is max. 1.25mm.
NOTE
Settings should only be made with the pump in operation – when the adjustment pin of the
metering stroke is momentarily relieved!
2.3 Delivery unit
The Pneumados metering pump is equipped with genuine ProMinent®beta delivery units of the
type series 1000 - 0220.
Liquid end materials The liquid end with double-ball valves in the suction and pressure valves is available in the
following material types:
PV = PVDF
SS = stainless steel (material number 1.4571).
The DEVELOPAN®metering diaphragm has a PTFE layer.
2.4 Pump control
A pump control is required to operate the Pneumados.
BA_PN_002_07_07_GB.p65 30.07.2007, 8:07 Uhr5

ProMinent® Page 6
Function
2.4.1 Electrical-pneumatic control
An electrical pulse generator drives a pneumatic solenoid valve. During the metering stroke, the
pneumatic solenoid valve applies compressed air to the pump; during the suction stroke, this air
volume is released into the open from the solenoid valve via the vent connection "R".
Technical data of the electrical-pneumatic control:
Electrical control Via pulse generator –pulse control of PLC control or pulse generator relay with pulse duration of
approx. 250ms, e.g. flashing relay, adjustable between 0.1 and 1s, 24Vdc
Pneumatic control Via 3/2-way solenoid valve, e.g. MHE3-M1H-3/2G-QS-6-K-525152 (order no. 1030275)
Mode of action Relieved in rest position
Nominal width ≥3,0 mm
Nominal flow rate ≥200 I/min
Line connection QS-6 (for hose 6x4)
Operating pressure 6 - 8 bar
Operating voltage 24 V DC
Power consumption 3,7 W
Type of protection pursuant
to EN 60259 IP65
Switching time On / Off 8 / 4,5 ms
ED ≤0,1s
AD ≤0,15s
3/2-way solenoid valve
with sound absorber
(option)
Pneumatic 3/2-way solenoid valve (option)
Configuration:
Wiring diagram:
Electrical pulse generator
Delivery limit Pneumados
Supply
voltage
24Vdc
Compressed air
Maintenance unit
Pneumados
6 bar
PE 6x4, max 1m
Pneumados metering pump
Delivery limit
Pneumatic hose PE 6 x 4, max. 1m
Electrical pulse
generator
Compressed air Maintenance unit
BA_PN_002_07_07_GB.p65 30.07.2007, 8:07 Uhr6

ProMinent®Page 7
Technical data
3Technical data
NOTE
Depending on the existing air pressure, the length of the pneumatic line and the layout of
the control, minor deviations in the delivery output may result.
Pump type Delivery output Connection Suction corresp. Suction corresp. Admissible
at maximum size height suction pressure height suction pressure pre-pressure
pressure oØ•iØ3), 4) 2) 1) 2) on suction side
bar l/h ml/ stroke mm mWC mbar mWC mbar bar
1000 10 0.76 0.07 6x4 6 600 2.0 200 8
1601 16 1.0 0.09 6x4 6 600 2.8 280 8
1602 16 1.7 0.16 6x4 6 600 3.0 300 5.5
1005 10 3.8 0.35 8x5 5 500 3.0 300 3
0708 7 6.3 0.58 8x5 4 400 2.0 200 2
0413 4 10.5 0.97 8x5 3 300 2.5 250 1.5
0220 2 16.7 1.55 12x9 2 200 2.0 200 1
1) Suction height / suction pressure (dry) determined with clean as well as moistened valves, is tested with empty liquid end.
2) Value corresponds to the obtainable vacuum compared to atmospheric pressure.
3) Suction height / suction pressure tested with filled liquid end and filled suction line, provided sufficiently dimensioned
suction line cross-sections are given.
The delivery outputs were determined with an air hose length of 1m, using the Festo solenoid valve MHE3-M1H-3/2G-QS-6K,
as well as at max. stroke frequency (180 strokes/min.) and 100% stroke length, with pump at operating state temperature, test
medium water.
Compressed air filtered 6 bar ±10%, filter size 40µm
Air consumption
for 1m line 47 I/min
Stroke frequency max. 180 strokes/min
Materials in contact
with medium, type PV SS...
Liquid end PVDF Stainless steel2)
Suction/pressure
connection PVDF Stainless steel2)
Gaskets PTFE PTFE
Balls Ceramic Ceramic
2) Material no. 1.4571
DEVELOPAN®metering diaphragm with PTFE layer.
Reproducibility,
metering accuracy ±2 given constant conditions, minimum backpressure 1 bar, stroke setting 30 –100%, and
water-like medium for short time intervals
Permissible deviation of
the delivery output for all
material types -5 % ...+ 15 %
Permissible ambient
temperature -10 °C bis +50 °C
Perm. media temperature -5 °C bis +50 °C
Climate conditions for storage and transport:
Humidity: < 95% relative humidity
Temperature: -10 °C bis +50 °C
BA_PN_002_07_07_GB.p65 30.07.2007, 8:07 Uhr7

ProMinent® Page 8
Accessories / Notes on safety
4Accessories
WARNING
The assembly of ProMinent metering systems using third-party components which are not
verified and recommended by ProMinent is not permitted and may lead to personal injury
and damage to property for which ProMinent will not accept any liability!
Order no. 354641 Compressed air connection union for Pneumados G 1/4A-6mm made of anodised aluminium with
gaskets, rotatable, quick coupling piece LCK 1/4"
Order no. 1030275 3/2-way solenoid valve MHE3-M1H-3/2G-QS-6-K 24Vdc
Order no. 1030277 Sound absorber UC QS-6 made of PE for solenoid valve
Order no. 1030276 Mounting angle MHE2-BG-L for solenoid valve
Order no. 1030351 Electrical pulse generator for assembly within protective housing on DIN rail pursuant to IEC/EN
60715, adjustable stroke frequency 30 –180 strokes/min., electrical connection 24Vdc / 0.6W.
Order no. 37205 Suction and metering line as well as pneumatic line made of PE 6 x 4mm (no fig.)
Foot valve with screen and non-return ball * (no fig.)
Metering valve with non-return ball * (no fig.
Order no. 1030028 Wall bracket compl. for Pneumados metering pump (no fig.
* Order number for size and material see product catalogue!
5Notes on safety
WARNING
•The pumps must be accessible any time for operation and maintenance, access may not
be hindered or blocked!
•Pneumados metering pumps can be operated with a max. permissible air pressure of 8
bar. Corresponding measures have to be taken to ensure that this pressure is not
exceeded – if required by installing a safety valve or a pressure limiting valve upstream
of the pump!
•Always rinse the liquid end first before commencing maintenance and repair work if
hazardous or unknown metering media are used!
•When metering hazardous or unknown metering media, suitable protective equipment
(goggles, gloves …) must be worn when working at the liquid end! Observe the safety
data sheets of the metering media!
•Switch off the pump control and close the compressed air supply line first before
starting any work at the pump! Always depressurise the metering line! Always empty
and rinse the liquid end! Observe the safety data sheets of the metering media!
Proper use •The pump is only designed for metering liquid media.
•All other uses or modifications are prohibited!
•The pump must not be used to meter gaseous media or solids.
•The pump is not designed for use in Ex areas.
•The pump may only be used in compliance with the technical specifications stated in the
operating instructions and in the technical data.
•The pump may only be operated if all components were installed in compliance with the
technical documentation and a proper installation was performed.
•The pump may only be operated by trained personnel.
IMPORTANT
•Settings should only be made with the pump in operation – when the adjustment pin of
the metering stroke is momentarily relieved!
•Only use the clamping rings and hose grommets specified for the corresponding hose
diameter as well as genuine hoses of the specified hose dimensions and wall thicknesses.
Otherwise, the stability of the connection is not guaranteed!
•Avoid reducing the hose sizes! In case of long lines and viscous media, the next higher
line cross-section or a pulsation dampener should be used!
BA_PN_002_07_07_GB.p65 30.07.2007, 8:07 Uhr8

ProMinent®Page 9
Identcode
6Identcode
Please enter the Identcode listed on the rating plate under "Type" into the space below.
PNDb Solenoid metering pump Pneumados B
Pump typ:
1000 10 bar –0.76 l/h
1601 16 bar –1.00 l/h
1602 16 bar –1.70 l/h
1005 10 bar –3.80 l/h
0708 7 bar –6.30 l/h
0413 4 bar –10.50 l/h
0220 2 bar –16.70 l/h
Material:
PV PVDF
SS Stainless steel
Diaphragm + gasket:
TStandard diaphragm with PTFE gasket
Liquid end type:
0without vent, without valve spring
1without vent, with valve spring
2with vent, without valve spring
3with vent, with valve spring
Hydraulic connection:
0Standard connection
1 Special connection 6x4
2 Special connection 8x5
3Special connection 12x9
Design:
0with PM-Logo
Energy connection:
0Connection G1/4, air pressure 6 bar
1Connection 6x4, air pressure 6 bar
Control type / control:
0Single-acting (standard)
1Electrical-pneumatic control
Approvals:
01 CE
PNDb –– –– –– –– –– –– –– –– ––
Viton®is a registered trademark of DuPont Dow Elastomers.
BA_PN_002_07_07_GB.p65 30.07.2007, 8:07 Uhr9

ProMinent® Page 10
7Unpacking
Polystyrene parts IMPORTANT
Polystyrene parts are hazardous waste and may not be included in domestic waste but
must be disposed off separately (hazardous waste disposal sites)!
Outer packaging Please keep the outer packaging complete with polystyrene parts to be able to return the
metering pump and accessories in case of repair or warranty claims!
First compare the delivery note and the package contents.
IMPORTANT
Please check whether the data on the rating plate match your order data!
If not, please immediately contact your local ProMinent branch or agency!
Each Pneumados metering pump is equipped with a rating plate.
The technical data as well as the Identcode and the serial number are listed. These two numbers
are to be used for any contact and replacement part orders because they facilitate a unique
identification of the pump type and the material type.
Please note the following data of the delivered pump to be able to immediately provide these data
when needed:
Identcode
Serial number
Installation location
Metering insert
Commissioning
Unpacking
BA_PN_002_07_07_GB.p65 30.07.2007, 8:07 Uhr10

ProMinent®Page 11
Dimension sheet
Threaded
bushings
M 5
G
55
B
C
D
A
17 29
E
F
8Dimension sheet
Dimension sheet PNDb PVC
(dimensions in mm)
1000 1601 1602 1005 0708 0413 0220
A103 105 103 107 109 109 111
B164 176 172 189 190 181 181
C78 90 88 92 93 88 88
D70 70 70 90 90 90 90
E6x4 6x4 6x4 8x5 8x5 8x5 12x9
F48 49 48 48 50 50 52
G50 50 50 66 66 66 66
Dimension sheet PNDb SST
(dimensions in mm)
1000 1601 1602 1005 0708 0413 0220
A108 103 103 106 111 113 113
B124 139 139 141 205 205 205
C62 69 69 71 103 103 103
D60 70 70 80 85 85 85
E6x5 6x5 6x5 8x7 8x7 8x7 12x10
F55 49 49 52 54 54 54
G50 50 50 66 66 66 66
BA_PN_002_07_07_GB.p65 30.07.2007, 8:07 Uhr11

ProMinent® Page 12
Assembly / installation
9Assembly / installation
9.1 Requirements on the compressed-air supply
Air pressure As is the case with all pneumatic components, Pneumados metering pumps, too, should be
operated with clean and dry compressed air. In addition, a pressure reduced should be installed
upstream which guarantees a constant air pressure of 6 bar ±10%.
The metering pump should preferably be operated with oil-free compressed air –however, oiled
compressed-air can also be used.
All parts coming into contact with compressed air are oil-resistant, however, oil may collect in the
pump housing after a longer period of time. This oil can be removed by blowing out, if required.
In order to prevent pressure fluctuations and condensate, the maintenance unit should be
installed as close as possible to the pump.
9.2 Assembly of the Pneumados metering pump
Mount the metering pump onto a tank or a bracket using 2 screws M5 and 2 washers ø5mm.
The valves must always be installed in a vertical position to guarantee a proper function.
Install the metering pump such that the suction height or the length of the suction line is kept as
short as possible to increase the operating safety.
9.3 Pneumatic connection
Remove the protective plug (1) at the top of the metering pump housing and check whether the
gasket surface is clean.
Install the compressed air connection union with gasket, fix the direction and tighten.
Alternative, a commercially available union (connection G 1/4”for hose 6 x 4mm) can be used.
Connect the compressed air hose 6 x 4mm to the pump and pneumatic valve; keep the hose
length as short as possible. In case of a longer distance (up to max. 1m), the metering output
decreases by up to 15% and the air consumption increases.
IMPORTANT
The pneumatic hose may not be kinked!
9.4 Connection of the suction and metering line
If the suction/pressure connection (5/3) of the liquid end (4) is closed with a plug, remove the plug.
WARNING
The metering pump may still contain residual water resulting from the test at the facility!
Remove any water from the liquid end before commissioning if metering media are used
which may not come into contact with water! For this purpose, rotate the pump by 180°and
empty the liquid end, then rinse with a suitable medium from top via the suction connection.
BA_PN_002_07_07_GB.p65 30.07.2007, 8:07 Uhr12

ProMinent®Page 13
Assembly / Installation
Hose connection Connect the hose to the suction/pressure connection (5/3) as follows:
•Position clamping ring and union nut onto the hose
•Extend the hose end of the rectangularly cut hose a bit and fully push onto the grommet
•Insert the flat gasket and tighten the union nut
•Now pull shortly at the hose and re-tighten the union unit.
NOTE
•Only use the clamping rings and hose grommets specified for the corresponding hose
diameter as well as genuine hoses of the specified hose dimensions and wall thicknesses.
Otherwise, the stability of the connection is not guaranteed!
•Avoid reducing the hose sizes!
•In case of long lines and viscous media, the next higher line cross-section or a pulsation
dampener should be used!
Union nut
Hose line
Flat gasket
Clamping ring
(installation position!)
Grommet
Suction
connection
Pressure
connection
BA_PN_002_07_07_GB.p65 30.07.2007, 8:07 Uhr13

ProMinent® Page 14
Assembly / Installation
Stainless steel connection •For stainless steel pipe connections, place union nut and clamping ring onto the pipe and let
protrude approx. 10mm.
•Push the pipe into the valve up to the stop.
•Tighten the union nut at first fingertight.
•In case of first assembly, then tighten the union nut 1 1/4 turns more
•In case of re-assembly, tighten 1/4 turns more.
Connection of
PE/PTFE lines to
stainless steel valves •When connecting PE/PTFE lines to stainless steel valves, insert stainless steel support sleeve
into the plastic line in addition.
Order no. 359365 Support sleeve for hose 6 x 4 mm
Order no. 359366 Support sleeve for hose 8 x 5 mm
Order no. 359368 Support sleeve for hose 12 x 9 mm
Suction line Cut the free suction line end such that the subsequently installed foot valve is positioned shortly
above the bottom of the tank –for metering solutions with contaminations or sediment at least
50mm above the tank bottom.
IMPORTANT
Always cut the suction line to the required length and route as riser!
Bypass hose line For the material type “PV“, a vent valve (9) is included. In this case, a hose line with an inner
diameter of 4 –5mm must be slipped on the bypass hose grommet (10) and the other end of the
hose must be returned to the metering tank; preferably use PVC soft 6 x 4mm.
For PE lines, this is e.g. to be secured against coming lose using an instant cable fastener.
In this case, also connect the pressure line to the pressure connection and the metering valve.
Open the vent valve (9) by turning the star handle anti-clockwise –the way for the coarse suction
ventilation via the bypass is now open.
For liquid ends without vent valve, only connect the pressure line to the liquid end but not to the
metering valve!
9.5 Installation examples
Individual components:
1 Metering pump
2 Metering tank
3 Foot valve with screen and non-return ball
4 Metering valve spring-loaded
5 Pressure-retaining valve type DK (liquid end installation)
6 Pressure-retaining valve type DL (metering line installation)
7 Air chamber / pulsation dampeners
8 Solenoid valve (closed if pump is idle)
9 Discharge valve
10 Vent valve
11 Shut-off device
NOTE
Height (h) x density (δ) ≤max. suction height in mWC!
Installation examples
Pneumados PNDb 1000 1601 1602 1005 0708 0413 0220
Suction height in WS 6665432
BA_PN_002_07_07_GB.p65 30.07.2007, 8:07 Uhr14

ProMinent®Page 15
9.5.1 Correct installation
Assembly / Installation
1) Standard installation 2) For outgassing metering media
For heavily outgassing media such as hydrogen
peroxide H2O2or sodium hypochlorite NaOCI, a “feed“
from the metering medium is recommended
3a) Metering with free outlet 3b) Metering with free outlet
and low delivery height and large delivery height
PNDb-022-D
4/6
BA_PN_002_07_07_GB.p65 30.07.2007, 8:07 Uhr15

ProMinent® Page 16
4a) For pre-pressure on suction side 4b) For pre-pressure on suction side
and low delivery height and large delivery height
For pre-pressure on suction side and free outlet on the pressure side, an adjustable pressure-retaining valve must
be provided in the metering line!
In addition, a shut-off valve (e.g. a solenoid valve) is to be provided which is closed when the pump is idle!
5) Installation for absolute prevention
of lifting-through in case of hazardous media
6a) Suction and pressure air chamber for long lines
Assembly / Installation
BA_PN_002_07_07_GB.p65 30.07.2007, 8:07 Uhr16

ProMinent®Page 17
Assembly / Installation
6b) Pressure air chamber for pulsation-free metering in pressure lines
6c) In case of free outlet
6d) Zur pulsationsfreien Dosierung ohne Nachlauf
7) To protect against excess pressure 8) Metering in vacuum
Nozzle
BA_PN_002_07_07_GB.p65 30.07.2007, 8:07 Uhr17

ProMinent® Page 18
Assembly / Installation
9) Suction height too high 10) Suction line cannot be vented 11) Suction-side pre-pressure too high
9.5.2 Incorrect installation
Do not route the suction line in loops because air
bubbles might remain in the suction line which
may result in a failure of metering.
If the metering point is below the chemicals store
tank, an adjustable pressure-retaining valve as well
as an additional shut-off valve is to be provided in
the metering line!
12) Lift effect 13) Air chamber ineffective
PNDb-032-D
PNDb-035-D
BA_PN_002_07_07_GB.p65 30.07.2007, 8:08 Uhr18

ProMinent®Page 19
Operation
10 Operation
10.1 Operation for SS version
Operate the metering pump at a stroke length of 100% and unpressurised metering line by
pneumatic control until the liquid end has been completely and bubble-free filled with the
medium. This is evidenced when the medium becomes visible in the venting or metering line or
if it discharges from the metering line.
Now connect the metering line to the metering valve.
10.2 Operation for PV version
Operate the metering pump at a stroke length of 100% and opened vent valve (9) by pneumatic
control until the liquid end has been completely and bubble-free filled with the medium. This is
evidenced when the medium becomes visible in the venting or metering line or if it discharges
from the metering line.
Close the vent valve (9) now.
In case slightly outgassing media, the fine venting can be permanently used for liquid ends with
vent valve (9):
For this purpose, remove the installed star handle (9a) and open the screw in the interior of the
vent valve (9) approx. 1 turn anti-clockwise.
•This causes a constant partial flow of the metering volume returning to the store tank.
•The returned volume should amount to approx. 20% of the metering volume.
•The media must have a low viscosity and may not have any solids.
WARNING
The above mentioned measures guarantee no absolutely reliable metering after stop of the
pump!
A regular check is thus absolutely necessary!
9a
9
BA_PN_002_07_07_GB.p65 30.07.2007, 8:08 Uhr19

ProMinent® Page 20
Maintenance / Troubleshooting / Remedy
11 Maintenance
WARNING
Metering pumps and their peripherals may only be maintained by trained and authorised
persons.
The maintenance of the Pneumados metering pump is limited to checking the metering output,
the leak-proofness of the liquid end and the compressed-air connections as well as the compressed-
air supply according to the site requirements.
12 Troubleshooting / Remedy
Faults which can be remedied by yourself or minor repair work which can be done by yourself.
NOTE
•In order to be able to remedy minor defects any time, we recommend to keep a
replacement part kit consisting of diaphragms, valves, balls, and gaskets, and a gasket
kit!
•The order numbers for these kits are listed in our product catalogue in "Solenoid pump
accessories - replacement part kits Beta/ 4“
WARNING
•Always rinse the liquid end first before commencing maintenance and repair work if
hazardous or unknown media are used!
•When metering hazardous or unknown metering media, suitable protective equipment
(goggles, gloves …) must be worn when working at the liquid end! Observe the safety
data sheets of the metering media!
•Switch off the pump control and close the compressed air supply line first before
starting any work at the pump!
Always depressurise the metering line!
Always empty and rinse the liquid end! Observe the safety data sheets of the metering
media!
12.1 Pump works, but no metering
Possible cause Air collected in the liquid end
Remedy 1. Vent the liquid end:
Set stroke length to 100% with adjustment (8) and then stop the pump
For PV type, open the vent valve (9) by approx. 1 turn anti-clockwise
For SS type, disconnect the metering line from the metering valve
Operate the metering pump for approx. 5 –10 metering strokes or until a metering is
performed with each metering stroke
Adjust the required stroke length (8) with the pump in operation and check whether it still
meters
Close the vent valve (9) or close the metering line at the metering valve with the pump
stopped
2. Based on the installation examples and notes (page 16), check whether a proper installation
was performed
3. Check whether the union nut of the suction line, the valves and screws at the liquid end are
properly tightened
4. Check whether the suction line has been installed as a riser.
Possible cause The activated fine ventilation does not work because the ventilation hole (ø1.0mm) is blocked.
Remedy •Remove the star handle (9a) and open the vent screw (9) by approx. 2 turns anti-clockwise with
the pump in operation until the blockage is eliminated
•If this is not successful, disassemble the vent valve and the fine vent screw and clean all parts
(including the holes)
•Then, mount the vent valve and restore the original settings.
BA_PN_002_07_07_GB.p65 30.07.2007, 8:08 Uhr20