Kobold KDF-2 Series User manual

Operating Instructions

for

Flow Meter / Monitor

for very Low Flows

Model: KDF-2../KDG-2...

KDF-2/KDG-2

page 2 KDF-2/KDG-2 K02/0112

1. Contents

1. Contents........................................................................................................2

2. Note ..............................................................................................................3

3. Instrument Inspection....................................................................................3

4. Regulation Use..............................................................................................4

5. Operating Principle........................................................................................4

6. Installation.....................................................................................................5

7. Commissioning..............................................................................................5

8. Limit Switches ...............................................................................................6

9. Electrical Connection ....................................................................................7

10. Maintenance .................................................................................................8

11. Technical Information....................................................................................9

12. Pressure losses...........................................................................................10

13. Order Codes ...............................................................................................10

14. Recommended Spare Parts........................................................................11

15. Dimensions .................................................................................................12

16. Declaration of Conformance .......................................................................13

Manufactured and sold by:

Kobold Messring GmbH

Nordring 22-24

D-65719 Hofheim

Tel.: +49(0)6192-2990

Fax: +49(0)6192-23398

E-Mail: [email protected]

Internet: www.kobold.com

KDF/KDG

KDF-2/KDG-2 K02/0112 page 3

2. Note

Please read these operating instructions before unpacking and putting the unit

into operation. Follow the instructions precisely as described herein.

The devices are only to be used, maintained and serviced by persons familiar

with these operating instructions and in accordance with local regulations

applying to Health & Safety and prevention of accidents.

When used in machines, the measuring unit should be used only when the

machines fulfil the EWG-machine guidelines.

as per PED 97/23/EG

In acc. with Article 3 Paragraph (3), "Sound Engineering Practice", of the

PED 97/23/EC no CE mark.

Diagram 6, Pipe, Group 1 dangerous fluids

3. Instrument Inspection

Instruments are inspected before shipping and sent out in perfect condition.

Should damage to a device be visible, we recommend a thorough inspection of

the delivery packaging. In case of damage, please inform your parcel service /

forwarding agent immediately, since they are responsible for damages during

transit.

Scope of delivery:

The standard delivery includes:

•Flow meter / Monitor model: KDF-2…/KDG-2…

•Operating Instructions

KDF-2/KDG-2

page 4 KDF-2/KDG-2 K02/0112

4. Regulation Use

The model KDF serve to measure and monitor liquid flow, models KDG serve to

measure and monitor gas flow.

Only clean, low viscosity and homogeneous liquids, which are compatible with

the materials of construction, should be measured. Dirt particles may block the

float and thus cause erroneous signals and measurements.

Standard Material Combinations

Material combination

stainless steel

Measuring cone Borosilicate glass

Float stainless steel 1.4401

Float stop Hostaflon ET

Valve stem st. steel 1.4404

Valve seat PTFE 25% C (carbon fibre)

Gaskets FPM (standard)

FFKM (option).

Fitting

(head and base part)

st. steel 1.4404

Hose nozzle Polyamid

5. Operating Principle

The flow meters and switches for very low flows model KDF and KDG for liquids

and air operate on the suspended float principle: that is, the installation position is

vertical and the direction of flow is from bottom to top.

The instruments have been designed as simple and thus economical measuring

systems. The float is a ball, whereby the indication point is the upper edge of the

ball. A needle valve is fitted as standard.

KDF/KDG

KDF-2/KDG-2 K02/0112 page 5

6. Installation

Installation in the Pipeline

•The rotameter flow meter must be installed vertically (float measuring

system). Direction of flow from bottom to top.

•Clean the pipeline to the device, before connecting, by blowing out or rinsing.

•The connection is made with unions suited for the model. The pipes should be

connected to the ports of the measuring instrument, centric and as free of

stress as possible. The piping should be supported if necessary, to prevent the

transmission of vibrations to the measuring instrument.

Panel Mounting

•The panel cut-out should be prepared for panel mounting according to the

drawing (see section 15. Dimensions).

•Installation in the control panel: Both screws (1) on the front panel of the

measuring instrument are loosened a bit, the device is inserted in the panel

cut-out from the front, aligned and fixed with both screws (1).

7. Commissioning

•The actual operating pressure and measuring temperature of the plant should

not exceed the specified maximum values.

•Ensure material compatibility.

•Close needle valve on flow meter.

•Open shutoff valve upstream and downstream of measuring instrument.

•The pipeline should be carefully vented for liquids.

•Allow the operating pressure to increase slowly for gases. Avoid sudden

bursts (danger of glass breaking).

•Open needle valve and set the desired flow rate.

•Should the operating parameters deviate from the calibration data (flow range,

measured medium, pressure, density and temperature), the measuring

instrument can be adapted to the actual conditions. Use the conversion of the

flow rate according to VDI/VDE guideline 3513.

KDF-2/KDG-2

page 6 KDF-2/KDG-2 K02/0112

8. Limit Switches

To signal particular flow rates the low volume flow meters can be fitted with limit

switches that initiate an electrical signal when the set value is reached. The float

in the flow meter must be made of stainless steel. One signal transmitter is

required for each limit value.

The following limit switch models are available:

•Bistable annular initiators RC 10-14-N3 or N7R29A (up to KDF-2220 and KDG-

2224) and RC 15-14-N3 or N7R31A (from KDF-2225 and KDG-2229) .

Bistable limit switches detect the direction of movement of the float when it

passes by. The device can thus determine whether the float is above or below

the annular initiator block. Bistable limit switches are delivered with connection

box and built-in filter EMC-Y 38132 or EMC-Y38133.

•Monostable annular initiators RC 10-14-NO or N7R28A (up to KDF-2220 and

KDG-2224 and RC 15-14-NO or N7R30A (from KDF-2225 and KDG-2229) .

The annular initiator is actuated when the metal float passes the annular

initiator (wiper effect). No EMV filter is required for monostable limit monitors.

A transistor relay should be connected on the load side for each switching

circuit for operation.

Adjusting the limit switch type RC10/15-14-N0/N3

The limit switch (ring form) can be

adjusted alongside of the measuring

tube. It is fixed via a screw (1) at a

guiding rod (3).

Adjusting of the contact:

-unscrew the fixing screw (1)

-move contact (2) to bottom or top

-lock fixing screw (1)

ATTENTION: (limited switching range)

For the measuring tubes / glasses N° 40,41,61,64 and 68 the contact

cannot be moved to the max. flow range.

KDF/KDG

KDF-2/KDG-2 K02/0112 page 7

Adjusting the limit switch type N7R**A

•The limit switch is adjusted for the

desired flow rate by moving it. The

limit switch (2) is fixed to the back

track (3) of the measuring instrument

with the two retaining screws (1).

•Please note that limit switches for

model numbers KDF-2239 to KDF-2241 and KDG-2257 to KDG-2268 can only

be used to approximately 50% of the max. measuring range because of the

cone-shaped measuring glasses.

•Replace plexiglass protective cover after adjustment.

9. Electrical Connection

Adjusting the limit switch

•Make sure that the electrical supply lines are not active.

•Connect the supply line to the transistor relay according to the wiring diagram.

The wiring diagram shown here is only valid for the transistor relay

recommended by us. We cannot provide any details here for connecting the

limit switch to a transistor relay from a different manufacturer.

•If the contact has not been adjusted yet, do so at this stage

Connect limit value controller (+) brown cable (-) blue cable with transistor relay

for devices without terminal box.

3- 1+

1 - +

Transistor relay

Typ KFD2…/KFA6…

Connection box

KDF-2/KDG-2

page 8 KDF-2/KDG-2 K02/0112

Wiring diagram for 2 limit transducers

When using two switch contacts the distance between both contacts

must be minimum 16 mm.

10. Maintenance

Replacing the Measuring Cone’

•Close valve upstream and downstream of device!

•Devices, fitted in a control panel, must be removed. Close device valve!

Attention! The measuring instrument must be pressure free and free

from aggressive and caustic media !

If necessary, rinse device thoroughly and neutralise before removal.

•Push plexiglass protective cover upwards and remove to the front.

•Rotate spanner in base of device counter-clockwise to loosen the measuring

glass; then remove the glass.

•Install in reverse order. To avoid breaking the glass in the measuring cone

when clamping, the measuring glass must be installed centric between the

gaskets.

Typ: RC 10/15-14 NO/N3

PTB 99 ATEX 2128 X

II 2G Ex ia IIC T6

Hazardous area

Inductive contacts

Typ: N7R**A

BVS 08 ATEX E026, IECEx BVS 09.0016,

II 1G Ga Ex ia IIC T6

II 1D Ex iaD 20 T125°C

KDF/KDG

KDF-2/KDG-2 K02/0112 page 9

11. Technical Information

Installation position: vertical, flow from bottom

Accuracy: ± 2,5 % qG50 (acc. VDI/VDE 3513, Bl.2)

± 3 % v. ME (inlet pressure regulator)

± 5 % v. ME (outlet pressure regulator)

(10-100% of range)

Max. pressure: PN 16

Medium temperature: -20 °C…+100 °C

-20 °C …+70 °C (with contact)

Ambient temperature: -20 °C…+100 °C

-20 °C …+70 °C (with contact)

Connection: ¼ NPT, G1/4 female

hose nozzle for 8 mm hose

Weight: approx. 0.4 kg

approx. 0,8 kg with pressure regulator

Materials (in contact with the media)

Fitting: stainless steel 1.4404

Measuring tube: borosilicate glass

Float stop: Hostaflon ET

Float: stainless steel 1.4401

Gasket: FPM, option FFKM

Valve stem: stainless steel 1.4404

Valve seat: PTFE 25% C (carbon fibre)

Hose nozzle (option): Polyamid

KDF-2/KDG-2

page 10 KDF-2/KDG-2 K02/0112

12. Pressure losses

Range

water

L/h

Order

No.

Valve seat

(mm)

Pressure

drop

(mbar)

Range

air**

LN/h

Order

No.

Valve seat

(mm)

Pressure

drop

(mbar)

0,25 –2,5 KDF-2217... 1,2 10 0,5 – 5 KDF-2207... 1,2 15

0,5 – 5 KDF-2220... 1,2 20 0,8 - 8 KDF-2209... 1,2 15

1,2 – 12 KDF-2225... 2,8 10 1,6 – 16 KDF-2213.. 1,2 15

2,5 – 25 KDF-2228... 2,8 20 4 – 40 KDF-2221... 1,2 20

4 – 40 KDF-2230... 2,8 30 6 – 60 KDF-2224... 1,2 25

6 - 60 KDF-2235.. 2,8 80 10 –100 KDF-2228... 2,8 15

10 –100 KDF-2239... 2,8 125 25 – 250 KDF-2232... 2,8 15

12 - 120 KDF-2240... 3,4 200 50 - 500 KDF-2237... 2,8 15

16 - 160 KDF-2241... 3,4 200 80 - 800 KDF-2242... 2,8 20

others KDF-22YY... on request on request 100 – 1000 KDF-2246... 2,8 25*

180 – 1800 KDF-2251.. 2,8 80

240 – 2400 KDF-2257... 2,8 125

300 – 3000 KDF-2261... 2,8 150

400 – 4000 KDF-2264... 3,4 200

500 – 5000 KDF-2268... 3,4 200

others KDF-22YY... on request on request

13. Order Codes

Liquids. Order Details (Example: KDF-2217 NV 0 M10)

Measuring

range

water

L/h

Order no.

stainless

steel

Connection*** Gasket

option

Panel

installatio

n kit

Contact option Miscellaneous

options

0,25 –2,5 KDF-2217...

N= ¼ NPT

R= G ¼

W= hose

connector

angular, 90°

S= hose

connector

straight

Y= special

V= FPM

T= FFKM

0= without

S= with

00 = without contact 0= without

E= pressure regulator

for variable inlet

pressure, FPM-

membrane

A= pressure regulator

for variable outlet

pressure, FPM-

membrane

F= pressure regulator

for variable inlet

pressure, FFKM-

membrane

B= pressure regulator

for variable outlet

pressure, FFKM-

membrane

Y= e.g. without

valve.

Please specify in

writing.

Up to model KDF-2220

with 2 m cable

M1=1 monostable contact

M2=2 monostable contacts

N1=1 bistable contact

N1=2 bistable contact

with junction box

A1=1 monostable contact

A2=2 monostable contacts

B1=1 bistable contact

B2=2 bistable contacts

0,5 – 5 KDF-2220...

1,2 – 12 KDF-2225...

2,5 – 25 KDF-2228...

4 – 40 KDF-2230...

6 – 60 KDF-2235... KDF-2225…KDF-2241

with 2m cable

M3=1 monostable contact

M4=2 monostable contacts

N3=1 bistable contact

N4=2 bistable contact

with junction box

A3=1 monostable contact

A4=2 monostable contacts

B3=1 bistable contact

B4=2 bistable contacts

10 –100 KDF-2239...*

12 - 120 KDF-2240...*

16 - 160 KDF-2241...*

other

liquids KDF-12YY...

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