Kobold RCD Specifications

Differential Pressure Flowmeters

for Water or Water-like Liquids

measuring

•

monitoring

•

analyzing

RCD

●● Measuring Ranges:

0.2...0.88 to 100...600 GPM (Water)

●● Accuracy: ± 3% of Full Scale

●● Max. Pressure: 580 PSIG

●● 1/2" to 3" Line Sizes

●● Materials: Brass and

316L Stainless Steel

●● Digital Indicator, Transmitters,

and Switches Available

KOBOLD companies worldwide:

ARGENTINA, AUSTRALIA, AUSTRIA, BELGIUM, BULGARIA, CANADA, CHILE, CHINA, COLOMBIA,
CZECH REPUBLIC, EGYPT, FRANCE, GERMANY, HUNGARY, INDIA, INDONESIA, ITALY, MALAYSIA,
MEXICO, NETHERLANDS, PERU, POLAND, REPUBLIC OF KOREA, ROMANIA, SINGAPORE, SPAIN,
SWITZERLAND, TAIWAN, THAILAND, TUNISIA, TURKEY, UNITED KINGDOM, USA, VIETNAM

01/03-28-2018

KOBOLD Instruments, Inc.
1801 Parkway View Drive
Pittsburgh, PA 15205

Main Ofce:

1.800.998.1020

1.412.788.4890
[e-mail]
www.koboldusa.com

Differential Pressure Flowmeters Model RCD

Description

The RCD series differential pressure flowmeter measures flows of
water and water-like liquids using the orifice principle. The orifice,
located in the flow body, generates a differential pressure which
varies with the rate of flow. The differential pressure is applied to
a measuring bellows. This is then linked to a Hall effect sensor,
which is input to a compact or full featured electronic display and
controller. This unique design, using a single measuring bellows,
enables the accuracy to be unaffected by fluctuations in pressure.
The meter movement is a single fulcrum lever design, with a
minimal number of wear components, that is simple and reliable.
It is available with brass or 316L stainless steel bodies ranging in
size from 1/2" NPT to 3" NPT. The various electronic displays and
control units offer a variety of options such as digital or bargraph
displays, adjustable switches, and flow transmitters.

Areas of Application

●● Machinery Manufacturing

●● Chemical Industry

●● Heavy Industry

●● Process Equipment

Housing

Gehäuse

Flow

Durchfluss

Force

P

1

P

2

P

1

P

2

V

V

1

2

Bewegung

Magnet

Magnet

Bellows

Faltenbalg

Technical Details

Measuring Accuracy: 3 % of Full Scale
Repeatability: 1 % of Full Scale
Process Temperature: 32...176 °F
Ambient Temperature: Max. 176 °F
Max. Pressure: 360 PSIG

(RCD-11 Connection: 3" NPT)
580 PSIG (All Others)

Pressure Loss: Approx. 5 PSI
Minimum Pressure: 10 PSIG
Protection: IP 65

Materials

Display Case: Cast Aluminum or Stainless Steel
Body: RCD-x1..: Brass
RCD-x2..: 316L Stainless Steel
Differential Pressure
Housing: RCD-x1..: Brass
RCD-x2..: 316L Stainless Steel
Pressure Meas. Cell: 316L Stainless Steel
Orifice: 316L Stainless Steel
Seals: RCD-x1..: NBR
RCD-x2..: FKM

Orifice

> V1 => P

V

2

> P

1

2

Venturidüse

Display/Electronics:

●● Compact Electronics: RCD-C

Display: 3-Digit LED
Analog Output: 4...20 mA Adjustable, Max. 500 Ω
Switching Outputs: 1 (2) Semiconductor PNP or NPN,
Factory Set
Contact Operation: N/C / N/O Programmable
Setting: Via 2 Buttons
Supply: 24 VDC ± 20%, 3-wire,
Approx. 100 mA
Electrical Conn.: Plug Connector M12 x 1

●● ADI-1 Electronics: RCD-K

Display: Bar Graph and 5-Digit Digital Display
Analog Output: 4...20 mA, 0-10 V

DC

2 Switching Outputs: Relay/Changeover Contact,
Max. 250 VAC/5 A Resistive Load,
Max. 30 VDC / 5 A
Setting: Via 4 Buttons
Supply: 100 ... 240 V
18 ... 30VAC / 10 ... 40 V

±

10 % or

AC

DC

Electr. Connection: Pluggable Terminal Block Via
Cable Gland

2

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No responsibility taken for errors;

subject to change without prior notice.

Differential Pressure Flowmeters Model RCD

Order Details: (Example: RCD 1106G N5 C34P)

Meas. Range

Water
(GPM)

0.2...0.88 2.80

0.2...1.1 3.15

0.2...1.3 3.50

0.3...1.8 4.00

0.3..2.2 4.50

0.3...2.8 5.00

0.5...3.5 5.60

0.5...4.4 6.30

1.0...5.6 7.10

1.0...7.0 8.00 RCD 1106G.. RCD 1206G..

1.0...9.0 9.00

2.0...11 10.00 RCD 1110G.. RCD 1210G..

2.0...15 11.20

3.0...17 12.50

3.0...22 14.00

4.0...30 16.00

5.0...35 17.50

5.0...44 19.20

10...70 26.00

15...90 28.00

20...110 31.00

20...140 33.50

30...180 40.00

30...240 43.50

30...280 51.00

100...600 67.00

Orifice

Ø

(mm)

Model / Body Material

Brass

RCD 1195G.. RCD 1295G..
RCD 1100G.. RCD 1200G..
RCD 1190G.. RCD 1290G..
RCD 1191G.. RCD 1291G..
RCD 1101G.. RCD 1201G..
RCD 1192G.. RCD 1292G..
RCD 1102G.. RCD 1202G..
RCD 1103G.. RCD 1203G..
RCD 1104G.. RCD 1204G..

RCD 1109G.. RCD 1209G..

RCD 1114G.. RCD 1214G..
RCD 1115G.. RCD 1215G..
RCD 1116G.. RCD 1216G..
RCD 1117G.. RCD 1217G..
RCD 1125G.. RCD 1225G..
RCD 1130G.. RCD 1230G
RCD 1135G.. RCD 1235G..
RCD 1137G.. RCD 1237G..
RCD 1139G.. RCD 1239G..
RCD 1141G.. RCD 1241G..
RCD 1145G.. RCD 1245G..
RCD 1150G.. RCD 1250G..
RCD 1155G.. RCD 1255G..
RCD 1160G.. RCD 1260G..
RCD 1165G.. RCD 1265G..

Stainless

Steel

Connection

..N4.. = ½" NPT

..N4.. = ½" NPT
..N5.. = ¾" NPT

..N4.. = ½" NPT
..N5.. = ¾" NPT
..N6.. = 1" NPT

..N5.. = ¾" NPT
..N6.. = 1" NPT

..N6.. = 1" NPT
..N8.. =1½" NPT

..N8.. = 1 ½" NPT
..N9.. = 2" NPT

..N9.. = 2" NPT
..NB.. = 3" NPT

..NB.. = 3" NPT50...400 60.00

Order Details: Continued

Compact Electronic*

Indication Supply Output/Contacts

..0R = 2x Open Collector, PNP

..C.. = Digital ..3.. = 24 V

Indication Power Supply Output Switches

..K.. = Bargraph/

Digital
LED
Display

* Please Specify Flow Direction in the Order (Except from Top to Bottom)

807.007 Mating Micro-DC plug with 6 ft. Cable for Compact Electronic

807.007/5M Mating Micro-DC plug with 16 ft. Cable for Compact Electronic

807.007/10M Mating Micro-DC plug with 32 ft. Cable for Compact Electronic

..0.. = 100-240 V

..3.. = 18-30 VAC,

10-40 V

DC

Full Size Display/Controller*

..0M = 2x Open Collector, NPN

..4P = 4-20 mA, 1x Open Collector, PNP

..4N = 4-20 mA; 1x Open Collector, NPN

..0.. = None

AC/DC

..4.. = 4-20 mA,
0-10 V

DC

Accessory

DC

..2 = 2 SPDT Relays

RCD Head Loss vs. Flow Rate

Net Pressure

Drop (PSI)

Across Meter

Percent of Rated Flow

No responsibility taken for errors;
subject to change without prior notice.

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3

RCD Installation Piping Requirements

Min. 10 X Pipe Ø

Dimensions

Differential Pressure Flowmeters Model RCD

In order to guarantee accurate readings, the RCD series
must be installed with a minimum of 10 diameters of
straight piping at the inlet and 5 diameters of straight

Min. 5 X

Pipe Ø

piping at the outlet. This straight piping must be the
same diameter as the flowmeter fittings and should have
no bends, elbows, tees, or valves.

RCD...C with Compact Electronics

D

thread

Gewinde

2.01"

51

RCD...K with ADI-1 Electronics

117 127

4.61" 5.00"

OBOLD

116

4.57"

S1 S2

P

ADI-1

Ø 44,5

Ø 1.75"

B

Connection A B

C

(mm)

D Weight

1/2" NPT 7.52" 3.07" SW 27 5.63" 4.63 lb
3/4" NPT 7.52" 3.07" SW 41 5.63" 5.29 lb

1" NPT 7.52" 3.07" SW 41 5.63" 4.85 lb

1-1/2" NPT 8.11" 3.07" SW 55 6.22" 5.73 lb

2" NPT 8.03" 3.14" SW 70 6.14" 6.39 lb
3" NPT 8.70" 4.17" SW 100 6.81" 11.46 lb

Connection A B

C

(mm)

D Weight

1/2" NPT 7.52" 3.07" SW 27 5.63" 7.50 lb

A

3/4" NPT 7.52" 3.07" SW 41 5.63" 8.16 lb

1" NPT 7.52" 3.07" SW 41 5.63" 7.94 lb

1-1/2" NPT 8.11" 3.07" SW 55 6.22" 8.60 lb

2" NPT 8.03" 3.14" SW 70 6.14" 9.26 lb
3" NPT 8.70" 4.17" SW 100 6.81" 14.30 lb

thread

Gewinde

B

4

45,5

1.79"

C

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No responsibility taken for errors;

subject to change without prior notice.