Kobold KDF-9 User manual

Operating Instructions
for
Flow Meter
Model: KDF-9/KDG-9

Operatin
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Instructions KDF-9/KDG-9
KDF-9/KDG-9 K04/0922 Page 2
Contents
1APPLICATIONS ............................................................................................................................... 5
1.1KDF-9 / KDG-9 ............................................................................................................................ 5
1.2KDF-9 / KDG-9 differential pressure regulator ....................................................................... 5
2OPERATIONAL MODE AND SYSTEM DESIGN KDF-9/KDG-9 .................................................... 5
2.1KDF-9 / KDG-9 system design ................................................................................................. 5
2.2Measuring principle for KDF-9 / KDG-9................................................................................... 5
2.3KDF-9 / KDG-9 system design ................................................................................................. 5
3INPUT ............................................................................................................................................... 6
3.1Measured variable: .................................................................................................................... 6
3.2Measuring range: ...................................................................................................................... 6
4ELECTRICAL OUTPUT (OPTION) .................................................................................................. 7
4.1Ad-on limit switches Type RC 10/15-14-XX, Manufacturer Pepperl & Fuchs ...................... 7
4.2Ad-on limit switches Type N7R**A, Manufacturer ifm electronic ......................................... 7
5MEASURING ACCURACY .............................................................................................................. 7
5.1Reference conditions:............................................................................................................... 7
5.2Measured error .......................................................................................................................... 7
5.3Repeatability .............................................................................................................................. 7
5.4Influence of ambient temperature ........................................................................................... 7
5.5Influence of fluid temperature .................................................................................................. 7
6CONDITIONS OF USE .................................................................................................................... 7
6.1Mounting / start-up .................................................................................................................... 8
6.2Ambient conditions ................................................................................................................... 8
6.2.1Ambient temperature ranges................................................................................................................... 8
6.2.2Storage temperature ............................................................................................................................... 8
6.2.3Climatic category .................................................................................................................................... 8
6.2.4Degree of protection ............................................................................................................................... 8
6.2.5Shock resistance/vibration resistance ..................................................................................................... 8
6.2.6Electromagnetic compatibility .................................................................................................................. 8
6.3Fluid conditions ......................................................................................................................... 8
6.3.1Fluid temperature ranges ........................................................................................................................ 8
6.3.2Fluid pressure limit .................................................................................................................................. 8
6.3.3Inlet and outlet sections .......................................................................................................................... 8
6.3.4Physical state: ......................................................................................................................................... 8
6.3.5Pressure for gas measurement ............................................................................................................... 8
6.3.6Pressure loss .......................................................................................................................................... 9
7DESIGN DETAILS ........................................................................................................................... 9
7.1Design/dimensions ................................................................................................................... 9
7.2Design / dimensions / operating details E/F/A/B (option differential pressure regulator) 9
7.2.1Dimension drawing KDF-9/KDG-9-…E/F with conn. ¼“ NPT (F) as regulator c/w constant outlet
pressure ............................................................................................................................................... 10
7.2.2Dimension drawing KDF-9/KDG-9-...-A/B with conn. ¼“ NPT (F) as regulator c/w constant inlet
pressure ................................................................................................................................................ 10
7.3Weights: ................................................................................................................................... 10
7.4Materials: .................................................................................................................................. 10
7.5Process connection: ............................................................................................................... 11
8ELECTRICAL CONNECTION FOR LIMIT SWITCH (OPTION) .................................................... 11

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Instructions KDF-9/KDG-9
Page 3 KDF-9/KDG-9 K04/0922
9INDICATOR UNIT .......................................................................................................................... 11
10CE MARKING ................................................................................................................................ 11
11AVAILABLE ACCESSORIES ........................................................................................................ 12
12ORDER INFORMATION ................................................................................................................ 12
13STANDARDS AND DIRECTIVES ................................................................................................. 12
14SAFETY INSTRUCTIONS ............................................................................................................. 12
14.1Intended use ............................................................................................................................ 12
14.2Installation, start-up and operating personnel ..................................................................... 12
15PACKAGING, STORAGE AND SHIPMENT ................................................................................. 12
16MAINTENANCE ............................................................................................................................. 12
ATTENTION ........................................................................................................................................... 13
REPLACING THE MEASURING CONE ............................................................................................... 13
REMOVAL: ............................................................................................................................................ 13
INSTALLATION: .................................................................................................................................... 13
17RETURNING DEVICES FOR REPAIR AND SERVICE ................................................................ 15
18DECONTAMINATION CERTIFICATE FOR DEVICE CLEANING ................................................ 16
19MODEL CODE ............................................................................................................................... 17
20EU DECLARATION OF CONFORMANCE ................................................................................... 18
Manufactured and sold by:
Kobold Messring GmbH
Nordring 22-24
D-65719 Hofheim
Tel.: [phone]
Fax: [phone]
E-Mail: [email protected]
Internet: www.kobold.com

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Instructions KDF-9/KDG-9
KDF-9/KDG-9 K04/0922 Page 4
The instruction manuals on our website www.kobold.com are always for currently manu-
factured version of our products. Due to technical changes, the instruction manuals avail-
able online may not always correspond to the product version you have purchased. If you
need an instruction manual that corresponds to the purchased product version, you can
request it from us free of charge by email ([email protected]) in PDF format, specifying
the relevant invoice number and serial number. If you wish, the operating instructions can
also be sent to you by post in paper form against an applicable postage fee.

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Instructions KDF-9/KDG-9
Page 5 KDF-9/KDG-9 K04/0922
1 Applications
1.1 KDF-9 / KDG-9
The flow meter can be used for measuring the flow of liquid and gaseous products in pipes.
It shows the current flow in volume or mass per unit time.
Applications:
Measuring the flow of liquid and gaseous products in pipes as well as dosing, superimposing, monitoring,
regulating and controlling them.
1.2 KDF-9 / KDG-9 differential pressure regulator
The flow meter can be used for stabilizing a constant flow of liquid and gaseous products in pipes. The
flow is kept constant regardless of pressure changes during product inflow for type KDF-9 / KDG-9-...E/F
or of a pressure change during product outflow for type KDF-9 / KDG-9-...A/B.
Applications: Constant dosing, level measurement in open and closed vessels, N2 superposition of
combustible media
Caution: The devices should be used with the greatest possible caution to measure potentially hazard-
ous liquids and (especially) gases. Precautionary measures must be taken to protect personnel and
equipment from any potential danger or damage due to glass-tube breakage. The plant operator is fully
responsible for using the devices. Where possible, we recommend the use of metal devices such as type
KDS.
2 Operational mode and system design KDF-9/KDG-9
Float principle:
The product flows through the meter vertically from the bottom to the top. The height of the float in the
measuring tube is a measure of the flow quantity. The float is in equilibrium between the buoyant force of
the flowing medium and the counteracting force of gravity on the float. The measured value is displayed
on the measuring-tube scale with the upper edge or the indicator edge of the float (ball).
2.1 KDF-9 / KDG-9 system design
The meter consists of a conical measuring tube made of glass containing a float that can move vertically.
The height of the float in the measuring tube reproduces the calibrated flow quantities on the measuring
tube.
2.2 Measuring principle for KDF-9 / KDG-9
Differential pressure regulator
The diaphragm of the controller is in a state of equilibrium when the pressure conditions are the same on
both sides. The pressure on the input side is determined by the pressure of the product; the pressure on
the output side is determined by the pressure drop of the setting valve of the flow meter.
If either the inlet or outlet pressure changes, the change in pressure is compensated by the built-in dia-
phragm valve - thus maintaining a constant set flow rate.
Important: The controller can only regulate inlet or outlet pressure fluctuations. Steady pressure condi-
tions must prevail on the other side.
2.3 KDF-9 / KDG-9 system design
The unit consists of a KDF-9/KDG-9 variable-area flow meter, equipped with a diaphragm differential
pressure flow controller. The variable-area flow meter consists of a device fitting with an integrated meas-
uring tube made of glass that contains a vertically movable float and the valve for setting the flow rate.
The differential pressure flow controller is made of stainless steel and consists of a diaphragm made of
Viton or PTFE and a compensating valve made of stainless steel. For gaseous products, two versions are
available:
KDF-9/KDG-9-...A/B for a constant inlet pressure and a variable outlet pressure
KDF-9/KDG-9-...E/F for a constant outlet pressure and a variable inlet pressure
For liquids, both versions can be used; however, the KDF-9/KDG-9-…A/B version should be preferred.

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Instructions KDF-9/KDG-9
KDF-9/KDG-9 K04/0922 Page 6
3 Input
3.1 Measured variable:
Volume flow
3.2 Measuring range:
(lower-range and upper-range values)
Measuring span water 20 °C KDF-9:
Smallest measuring range: 0.02-0.25 l/h water Largest measuring range: 10-100 l/h water
Measuring span air 20°C, 1,013 bar abs. KDG-9
Smallest measuring range: 2-20 Nl/h air Largest measuring range: 300-3000 Nl/h air
Measuring /controlling range for E/F/A/B (option diff.pressure regulator)
Span: 10-100%
Smallest measuring/controlling range
0.02-0.25 l/h water 2-20 Nl/h air
Largest measuring/controlling range
10-100 l/h water 300-3000 Nl/h air
Measuring range table
All measuring range values with fully opened valve, * Restricted contact adjustment range / contact only adjustable as minimum contact
Measuring ranges
water 20 °C
Measuring ranges
air 1,013 bar abs., 20 °C
Float st. 1.4401
(
316L
)
/
g
lass Float st. 1.4401
(
316L
)
/
g
lass
Range
N°
Water
l/h
ø Float
(mm)
ø Valve
seat
(
mm
)
Press.
loss
(
mbar
)
Range
N°
air
l/h
ø Float
(mm)
ø Valve
seat
(
mm
)
Press.
loss
(
mbar
)
91 0.02-0.25
g
lass 2.8 2 88 2-20
g
lass 2.8 1
92 0.08-0.7
g
lass 2.8 3 89 4-40
g
lass 2.8 2
79 0.1-1 1.4401 2.8 2 70 5-50 1.4401 2.8 1
80 0.25-2.5 1.4401 2.8 3 71 10-100 1.4401 2.8 2
81 1.0-10 1.4401 2.8 3 90 12-120
g
lass 2.8 2
82 1.5-16 1.4401 2.8 5 72 25-250 1.4401 2.8 2
83 2.5-25 1.4401 2.8 5 73 30-350 1.4401 2.8 2
84 4-40 1.4401 2.8 5 74 50-450 1.4401 2.8 3
85 5-65 1.4401 2.8 5 75 60-800 1.4401 2.8 3
86 6-63 1.4401 2.8 6 76 120-1200 1.4401 2.8 3
87 10-100 1.4401 2.8 6 77 200-2000 1.4401 2.8 3
78 300-3000 1.4401 2.8 3

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Instructions KDF-9/KDG-9
Page 7 KDF-9/KDG-9 K04/0922
4 Electrical output (option)
1 inductive limit switch
Mono- or bistable
4.1 Ad-on limit switches Type RC 10/15-14-XX, Manufacturer Pepperl & Fuchs
Monostable Type RC 10/15-14-N0
Bistable Type RC 10/15-14-N3
4.2 Ad-on limit switches Type N7R**A, Manufacturer ifm electronic
Monostable Typ N7R28A (Inside diameter 10mm)
N7R30A (Inside diameter 15mm)
Bistable Typ N7R29A (Inside diameter 10mm)
N7R31A (Inside diameter 15mm)
5 Measuring accuracy
5.1 Reference conditions:
Water 20°C (air 20°C; 1, 013 bar abs)
5.2 Measured error
(Liquid/Gas): 3% qG=50% acc.. VDE/VDI 3513 page 2
E/F/A/B (option diff.pressure regulator):  3, 5 % /  5 % FS within 10-100% of the range
5.3 Repeatability
(Liquid/Gas)  1.0 % FS,
E/F/A/B (option differential pressure regulator):  1, 5 % /  2, 5 % FS within 10-100% of the range
5.4 Influence of ambient temperature
none
5.5 Influence of fluid temperature
Deviations in fluid temperature from the temperature observed during calibration can result in a propor-
tional display fault because of the corresponding change in density and viscosity.
6 Conditions of use
The VDI/VDE guidelines must be observed.
The devices can be used for:
- liquid products that are sufficiently free-flowing, are free of solids, do not bond or do not tend to settle.
- gases with linear flow behavior and an adequate inlet pressure.
V/N(option differential pressure regulator)
The minimum differential inlet and outlet pressures must be 350 mbar.
Please refer to the instructions for potentially hazardous products in Section 1.2.

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Instructions KDF-9/KDG-9
KDF-9/KDG-9 K04/0922 Page 8
6.1 Mounting / start-up
Whenstartinguptheflowmeter,thefollowingpointsmustbeobserved:
- The variable-area flow meter must be installed perpendicularly (direction of flow from the bottom to the
top).
- Take special care to install glass-tube devices free from strain.
- The size of the product line to be connected must be identical to the size of the device connection.
- All instruments are shipped with the valve installed at the inlet. By turning the glass tube resp. the fitting,
the valve also can be installed at the outlet.
- E/F/A/B (option diff.pressure regulator): When using gases, the version for a constant inlet pressure
with "valve at the top" and for a constant counter pressure with "valve at the bottom" should be used.
If liquids are involved, the position of the valve does not have any impact on the function of the meter.
- Slowlyopentheshut‐offvalveupstreamanddownstreamoftheflowmeter.
- Whenmeasuringliquids,ventthepipescarefully.
- Whenmeasuringgases,increasepressureslowly.
- Voidfloatimpact(e.g.causedbysolenoidvalves),asthisislikelytodamagethemeasuring sectionorfloat.
6.2 Ambient conditions
6.2.1 Ambient temperature ranges
-20°C to +100°C (with limit switch -20° +70°C) (risk of breakage due to frost)
6.2.2 Storage temperature
-20°C to +100°C
6.2.3 Climatic category
Weather-protected and/or unheated locations
6.2.4 Degree of protection
IP65 (EN60529)
6.2.5 Shock resistance/vibration resistance
The meter should be protected from shocks and vibrations, which could cause damage.
6.2.6 Electromagnetic compatibility
Built in limit switch:
acc. NAMUR recommendation NE 21
Product standard: EN 60947-5-2: 2004
6.3 Fluid conditions
6.3.1 Fluid temperature ranges
without limit switch -20°C to + 100°C
with limit switch -20°C to + 70°C (risk of breakage due to frost)
6.3.2 Fluid pressure limit
16 bar (at 20 degrees Celsius)
Important:
All pressure values are for non-hazardous liquids and for devices installed free from strain.
For E/F/A/B, (option differential pressure regulator) the maximum unilateral pressure resistance of the
diaphragm is 7 bar.
6.3.3 Inlet and outlet sections
Inlet and outlet sections are not required for a linear flow profile of the fluid.
6.3.4 Physical state:
Liquid or gaseous
6.3.5 Pressure for gas measurement

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Instructions KDF-9/KDG-9
Page 9 KDF-9/KDG-9 K04/0922
The measured values only apply to the calibrated fluid data stated on the scale. Any change or deviation
in pressure will cause a display fault.
6.3.6 Pressure loss
Depends on the measuring range. (see measuring range tables in Section 3.2)
7 Design details
7.1 Design/dimensions
The meter consists of a conical measuring tube made of borosilicate glass with a vertically movable float
made of stainless steel or glass. The measuring tube is installed in the device fitting and does have a hor-
izontal connection on the rear.
The standard version of the device is equipped with an adjusting valve at the outlet
KDF-9/KDG-9 ( dimensions in mm )
7.2 Design / dimensions / operating details E/F/A/B (option differential pressure
regulator)
Differential pressure regulators are used to achieve constant flow values at variable inlet and outlet pres-
sures.
 Differential pressure regulators are not pressure reduction valves
The measuring device consists of variable area flowmeter with control valve and mounted differential
pressure regulator.
The flow amount will be adjusted via the integrated adjusting valve.
The max.one side pressure resistance of the regulator membrane is 7 bar. If the operating pressure ex-
ceeds 7 bar, the control valve must not be fully closed as this leads into overstressing the membrane.
IMPORTANT OPERATION DETAILS
 The installation of any valve before the inlet and outlet of the instrument shall be avoided
 Initial operation / start up of the process only with opened control valve
 When operating any gas the inlet pressure shall be increased slowly to avoid strong pressure
peaks
 Any operation of the instrument trough any solenoid valve shall be avoided, this will prevent
the float will be thrown upwards heavily.
 For the operation of the regulator minimum inlet pressure are required.
Regulator with constant outlet pressure: 350 mbar
Regulator with constant inlet pressure: 350 mbar
The threaded pins M4 are only mounted if the option
„Wall Mounting“ has been selected.

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Instructions KDF-9/KDG-9
KDF-9/KDG-9 K04/0922 Page 10
7.2.1 Dimension drawing KDF-9/KDG-9-…E/F with conn. ¼“ NPT (F) as regulator c/w constant
outlet pressure
7.2.2 Dimension drawing KDF-9/KDG-9-...-A/B with conn. ¼“ NPT (F) as regulator c/w constant
inlet pressure
7.3 Weights:
KDF-9/KDG-9: 0.4 kg, KDF-9/KDG-9…E/F/A/B: 0.8 kg
7.4 Materials:
Fitting, connections, setting valve: 1.4404 (316L)
Float 1.4401 / glass
Seals measuring tube:viton, FFKM (option)
Valve: PTFE, Hoses: PVC
E/A (option differential pressure regulator)
Controller/control pipes: 1.4301

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Instructions KDF-9/KDG-9
Page 11 KDF-9/KDG-9 K04/0922
7.5 Process connection:
NPT¼“ (F)
Special connections: Ermeto, Swagelok, G ¼“, Hose connector 8 mm
Important: Other connections are available as special versions
8 Electrical connection for limit switch (option)
with cable end length of 2 m
Wiring diagram for limit switch
9 Indicator unit
Direct indication via the position of the float in the measuring tube
10 CE marking
The measuring system meets the statutory requirements of the following EU directives: Electromagnetic
Compatibility (EMC) Directive 2014/30/EU.
With respect to the Pressure Equipment Directive 2014/68/EU, the devices fall within the scope of appli-
cation of Article 4, Section 3, and need no CE mark in accordance with this directive.
Kobold Messring confirms compliance with the directives by attaching the CE mark.
The limit switch (ring form) can be adjusted alongside of
the measuring tube. It is fixed via two screws (1) at the
back wall of the instrument.
Adjusting of the contact:
-unlock the fixing screws (1)
-move contact (2) to bottom or top
-lock fixing screws (1)
ATTENTION: (limited switching range)
Measuring ranges 78, 78 and all ranges with glass float
cannot be equipped with contact. For the measuring
tubes N° 77 and 86 the contact cannot be moved to the
max. flow range.
Auxillary power
Typ: RC 10/15-14 NO/N3
Typ: N7R**A
2
2

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Instructions KDF-9/KDG-9
KDF-9/KDG-9 K04/0922 Page 12
11 Available accessories
1 inductive limit switch ; mono-stable or bi-stable
Special connections
12 Order information
Please include the following information in your order: Product data,(specific weight, temperature,
pressure, viscosity) material design, connection size, measuring range, desired accessories, required
approvals and material certificates.
13 Standards and directives
Measuring range rated and converted to other products according to VDE/VDI guidelines 3513
Directive 2014/68/EU (Pressure Equipment Directive)
For the electrical sensor
EN 60079-0 General regulations
EN 60079-11 instrinsically safeness
Guideline 2014/30/EU (EMC guidleine)
NAMUR recommendation NE 21
EN 60529 – Degrees of protection through housing (IP code)
EN 61010-1 – Safety requirements for electrical measuring, control and laboratory devices
14 Safety instructions
14.1 Intended use
The KDF-9/KDG-9 variable-area flow meter may be used only for flow measurements of fluid and gase-
ous media. The manufacturer shall not be liable for damage that may result from improper or unintended
use.
When dealing with an aggressive medium, clarify the material durability of all wetted parts.
14.2 Installation, start-up and operating personnel
Only trained specialists authorized by the system operator may carry out the installation, electrical instal-
lations, start-up, maintenance and operation. They must read and understand the operating manual and
follow its instructions.
Basically, follow the conditions and provisions applicable in your country.
15 Packaging, storage and shipment
Carefully unpack the device to avoid damaging it. With the help of the delivery note enclosed in the pack-
aging, check whether all technically relevant data coincide with your requirements.
Storage and installation must be done in a clean and dry room so that contamination – especially of the
interior of the fitting – is avoided. Follow the limit values for ambient temperature.
When transporting the device to a remote mounting location, we recommend that you reuse the factory-
issued packaging and the transport protection.
16 Maintenance
If you use the meter in the intended manner special maintenance is not necessary. However, the variable
area flow meter should be checked in the context of the routine maintenance of the facility and the pipe-
lines. You have to eighth especially for dirt, corrosion denudation, mechanical wear as well damage at the
glass cone. We recommend checking the meter once a year.
In the recurrent pressure test of the system, the maximum allowed pressure test PT (see name plate)
must not be exceeded.

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Instructions KDF-9/KDG-9
Page 13 KDF-9/KDG-9 K04/0922
Attention
If cleaning of the float or of the measuring cone is necessary due to contamination, please note following
items:
 Before removing a device, make sure that the pipe line is empty (no product residues) depressur-
ized and cooled.
 For devices that are used to measure corrosive or hazardous media, appropriate security precau-
tions have to be taken regarding any remaining liquid in the measuring unit
 Avoid electrostatic charging of surfaces when cleaning non-conductive surfaces (e.g. protective
hood)
 Having dismantled the device, dirt on the inside of glass measuring cones can be gently cleaned
with a brush and appropriate media.
 When assembling and reinstalling the system always new gaskets have to be used.
Replacing the measuring cone
Removal:
 Close valve in front and behind the unit
 Close needle valve of the device
 Shift protective cover upwards and remove to the front.
 By turning the adjusting ring at the unit base counterclockwise the measuring glass can be loos-
ened and removed.
Installation:
 Installation has to be carried out in reverse order
 The measuring glass is fixed by clamping the adjusting ring on the unit base hand tightened
 With a 3 mm pin the clamping ring is fixed by 4, max. 5 120° turns clockwise.
 The torque should be max 2.8 to 3 Nm.
 Caution! To avoid breaking of the glass flow tube it has to be installed centrally between the
seals.
 Before re-commissioning the tightness of the measuring device has to be checked by suitable
means.
Clamping ring

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Instructions KDF-9/KDG-9
KDF-9/KDG-9 K04/0922 Page 14
Attention
The shaft packing of the valve must be readjusted
during the life cycle. This requires tightening of the
thrust piece (1)
Loosen thread pin (2) M4x8 with hexagon 2mm
and remove valve knob (3).
Tighten thrust piece (1) SW14 with a torque of
3, 8 Nm - 4, 0 Nm
Caution
Valves that have not been operated for a long time
may require a higher operating torque.
(1)Thrust piece
(3) Valve knob
(2) Thread pin

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Instructions KDF-9/KDG-9
Page 15 KDF-9/KDG-9 K04/0922
17 Returning devices for repair and service
Note:
In accordance with the applicable German waste disposal legislation, the owner/client is responsible for
the disposal of special waste and hazardous materials. Consequently, all devices sent to us for repair
must be free of any hazardous materials. This also applies to possible hollow spaces and fissures in the
devices.
If repair is necessary, confirm the above-mentioned requirement in writing (please use the form in the Ap-
pendix).
If hazardous materials remain in or on the device after it has been returned, Kobold Messring is author-
ized to remove them at the client’s expense without further inquiry.

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Instructions KDF-9/KDG-9
KDF-9/KDG-9 K04/0922 Page 16
18 Decontamination certificate for device cleaning
Company: ............................... City: ...................................
Department: ........................... Name: ................................
Tel: ………..............................
This variable-area flowmeter
Type KDF-9/KDG-9-…………………...........
was operated using the measured medium..................................................................
Since this measured medium is dangerous in water*/poisonous*/corrosive*/flammable*,
we have:
 checked that all hollow spaces of the device are free of these materials*
 neutralized and flushed all hollow spaces of the device*
*cross out what is not applicable.
We hereby confirm that in resending the device no danger to persons or the environment is posed by the
residual measured substance.
Date: ............................. Name: ………………. Signature: ...........................
Stamp

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Instructions KDF-9/KDG-9
Page 17 KDF-9/KDG-9 K04/0922
19 Model Code
Liquids Order Details (Example: KDF-9291 NV 0 00 0)
Measuring
range water
[l/h]
Valve
seat
[mm]
Pressure
drop
[mbar]
Order no.
stainless
steel
Connection Gasket
option
Wall-instal-
lation Contact option Miscellaneous op-
tions
0,02-0,25 2,8 2 KDF-9291...1)
N = ¼“ NPT
R = G ¼4)
W = hose
connector
angular, 90°,
for 8 mm hose
S = hose
connector,
straight, for
8 mm hose
Y = Special
V = FPM
T = FFKM
0 = without
W
= with
00 = without
contactt
with 2 m cable
M3 = 1 contact
monostable
N3 = 1 contact
bistable
with
junction box
A3 = 1 contact
monostable
B3 = 1 contact
bistable
0 = without
E = differential pres.
contr. with
constant outlet
pressure, valve
at input
¼“ NPT, FPM
A = differential pres.
contr. with
constant inlet
pressure, valve
at output
¼“ NPT, FPM
F = as ‚E‘ however
with FFKM
instead of FPM
B = as ‚A‘ however
with FFKM
instead FPM
Y = e.g. without
valve,
Please specify
in writing
0,08-0,7 2,8 3 KDF-9292...1)
0,1-1,0 2,8 2 KDF-9279...
0,25-2,5 2,8 3 KDF-9280...
0,6-6,3 2,8 3 KDF-9281...
1,0-10 2,8 5 KDF-9282...
1,5-16 2,8 5 KDF-9283...
2,5-25 2,8 5 KDF-9284...
4,0-40 2,8 5 KDF-9285...
6,0-63 2,8 6 KDF-9286... 2)
10-100 2,8 6 KDF-9287... 1)
Special
range
on re-
quest
on re-
quest KDF-92YY...
Gases Order Details (Example: KDG-9288 NV 0 00 0)
Measuring
range air
[Nl/h]
Valve
seat
[mm]
Pressure
drop
[mbar]
Order no.
stainless
steel
Connection Gasket op-
tion
Wall in-
stalla-
tion
Contact option Miscellaneous op-
tions
2.0-20 2.8 1 KDG-9288...1)
N = ¼“ NPT
R = G ¼4)
W = hose
connector
angular, 90°,
for 8 mm hose
S = hose
connector,
straight, for
8 mm hose
Y = Special
V = FPM
T = FFKM
0 = wit-
hout
W
= with
00 = without
contactt
with 2 m cable
M3 = 1 contact
monostable
N3 = 1 contact
bistable
with
junction box
A3 = 1 contact
monostable
B3 = 1 contact
bistable
0 = without
E = differential pres.
contr. with
constant outlet
pressure, valve
at input
¼“ NPT, FPM
A = differential pres.
contr. with
constant inlet
pressure, valve
at output
¼“ NPT, FPM
F = as ‚E‘ however
with FFKM
instead of FPM
B = as ‚A‘ however
with FFKM
instead FPM
Y = e.g. without
valve,
Please specify
in writing
4.0-40 2.8 2 KDG-9289...1)
5.5-50 2.8 1 KDG-9270...
10-100 2.8 2 KDG-9271...
12-120 2.8 2 KDG-9290... 1)
25-250 2.8 2 KDG-9272...
30-350 2.8 2 KDG-9273...
50-450 2.8 3 KDG-9274...
60-800 2.8 3 KDG-9275...
120-1200 2.8 3 KDG-9276...
200-2000 2.8 3 KDG-9277... 2)
300-3000 2.8 3 KDG-9278... 1)
Special
range
on re-
quest
on re-
quest KDG-92YY...
1) not available with contact
2) only available for contacts with limited switching
range
3) at 1013 bar abs. and 20 °C
4) not with differential pressure controller

Operatin
g
Instructions KDF-9/KDG-9
KDF-9/KDG-9 K04/0922 Page 18
20 EU Declaration of conformance
We, KOBOLD Messring GmbH, Hofheim-Ts, Germany, declare under our sole responsibility that the
product:
Flow Meter Model: KDF-9/KDG-9-... with limit switches Type RC 10/15-14-XX or Type
N7R**A
to which this declaration relates is in conformity with the standards noted below:
EN 61000-6-2:2011 Electromagnetic compatibility (EMC) - Part 6-2: Generic standards - Im-
munity for industrial environments
EN 61000-6-3:2012 Electromagnetic compatibility (EMC) - Part 6-3: Generic standards - Emis-
sion standard for residential, commercial and light-industrial environments
EN 55011:2011 Industrial, scientific and medical equipment - Radio-frequency disturbance
characteristics - Limits and methods of measurement
EN 61326-1:2011 Electrical equipment for measurement, control and laboratory use - EMC re-
quirements - Part 1: General requirements
EN 50581:2012 Technische Dokumentation zur Bewertung von Elektro- und Elektronikgeräten
im Hinblick auf die Beschränkung gefährlicher Stoffe
Also the following EU guidelines are fulfilled:
2014/30/EU EMC Directive
2011/65/EU RoHS (category 9)
Hofheim, 01 November 2018
H. Peters M. Wenzel
General Manager Proxy Holder