Page 1
Technical Datasheet
Technical Datasheet
DK46 - DK800
DK46 - DK800
DK46 - DK800DK46 - DK800
Technical DatasheetTechnical Datasheet
Variable area flowmeter
• Local indication without auxiliary power supply
• Adaptable to meet customers' requirements
• Replaceable mounting parts that are easily assembled
© KROHNE 07/2009 - 4000193403 TD DK46_800-R04 en
Page 2
CONTENTS
DK46 - DK800
1 Product features 3
1.1 DK46 - DK800 variable-area flowmeter........................................................................... 3
1.2 Options and variants......................................................................................................... 5
1.3 Operating principle........................................................................................................... 7
2 Technical data 8
2.1 Technical data................................................................................................................... 8
2.2 Dimensions and weights ................................................................................................ 11
2.3 Measuring ranges...........................................................................................................13
2.4 Differential pressure regulators .................................................................................... 16
3 Installation 19
3.1 Intended use ................................................................................................................... 19
3.2 Installation conditions ....................................................................................................19
3.2.1 Installation in the piping ....................................................................................................... 19
4 Electrical connections 20
4.1 Limit switch .................................................................................................................... 20
5 Order form 21
6 Notes 22
2
www.krohne.com 07/2009 - 4000193403 TD DK46_800-R04 en
Page 3
DK46 - DK800
1.1 DK46 - DK800 variable-area flowmeter
The DK46...DK800 flowmeters are suitable for measuring the volume flow rate of liquids and
gases.
PRODUCT FEATURES 1
DK46 accuracy 4,0%
DK800 accuracy 2,5%
DK47 accuracy 2,5%
DK48 accuracy 1,0%
www.krohne.com07/2009 - 4000193403 TD DK46_800-R04 en
3
Page 4
1 PRODUCT FEATURES
Highlights
• Simple installation and start-up
• Compact design
• Low maintenance
• Limit switches are optional
• All variants come with high quality needle valves
• No wearing parts
• Fragment protection
Industries
• Chemical
• Heating, cooling, and air conditioning
• Iron, steel and metal
• Oil & Gas
• Pharmaceutical
• Analytical technology
• Mechanical engineering
• Paper and pulp
• Water
DK46 - DK800
Applications
• Fine metering
• Gas chromatography
• Minimum level monitoring and control
• In connection with a differential pressure regulator: Ensures constant flow rate in the case of
variable inlet or outlet pressures
4
www.krohne.com 07/2009 - 4000193403 TD DK46_800-R04 en
Page 5
DK46 - DK800
1.2 Options and variants
DK devices with limit switches
PRODUCT FEATURES 1
The DK devices can be provided with max. two
limit switches, NAMUR or 3-wire open
collector.
DK with differential pressure regulators
Differential pressure regulators are used to
provide constant flow rates in the case of
variable inlet or outlet pressures.
www.krohne.com07/2009 - 4000193403 TD DK46_800-R04 en
5
Page 6
1 PRODUCT FEATURES
Instrument designation
DK46 - DK800
Instruments with head 1 and foot pieces 2
made from:
Stainless steel = DK…/R
Brass = DK…/N
PVDF = DK…/PV
6
www.krohne.com 07/2009 - 4000193403 TD DK46_800-R04 en
Page 7
DK46 - DK800
1.3 Operating principle
The flowmeter operates on the float measuring principle
The measuring unit consists of a glass cone in which a float can move freely up and down. The
medium flows through the flowmeter from bottom to top.
The float adjusts itself so that the buoyancy force AAAA, acting on it, the form drag WWWW and its weight GGGG
are in equilibrium: G = A + W
G = A + W.
G = A + WG = A + W
PRODUCT FEATURES 1
Figure 1-1: Operating principle
The height of the float is read on the scale of the measuring glass and indicates the flow rate.
The top edge of the float marks the reading line for flow values.
www.krohne.com07/2009 - 4000193403 TD DK46_800-R04 en
7
Page 8
2 TECHNICAL DATA
2.1 Technical data
•
The following data is provided for general applications. If you require data that is more
relevant to your specific application, please contact us or your local representative.
•
Additional information (certificates, special tools, software,...) and complete product
documentation can be downloaded free of charge from the website (Downloadcenter).
Measuring system
Application range Flow measurement of liquids and gases
Operating method / measuring principle Variable area measuring principle
Measurement
Primary measured value Float position
Secondary measured value Operating and standard volumetric flow
Measuring accuracy
Directive VDI / VDE 3513, sheet 2 (qG = 50%)
DK46 4.0%
DK47 2.5%
DK48 1.0%
DK800 2.5%
DK46 - DK800
Operating conditions
Temperature
Temperature
TemperatureTemperature
Max. operating temperature TS -5..+100°C / +23...+212°F
Pressure
Pressure
PressurePressure
Operating pressure PS Pressure Equipment Directive 97/23/EC
Test pressure PT Pressure Equipment Directive 97/23/EC
Max. permitted operating gauge pressure PS at TS = 100°C / 212°F:
DK…/R (stainless steel top and bottom fittings ) 10 bar / 145 psig 1
DK…/N (brass top and bottom fittings ) 10 bar / 145 psig 1
DK…/PV (PVDF top and bottom fittings ) 4 bar / 58 psig
Installation conditions
Inlet and outlet None
1 higher pressures upon request
8
www.krohne.com 07/2009 - 4000193403 TD DK46_800-R04 en
Page 9
DK46 - DK800
Materials
1 top and bottom fittings made of PVDF not on DK48
TECHNICAL DATA 2
Top fitting, bottom fitting CrNi steel 1.4404 / 316 L, nickel-plated brass, PVDF 1
Top fitting, bottom fitting (optional)
Hastelloy
Measuring tube Borosilicate glass
Float (ball) CrNi steel 1.4401 / 316
Float options
Glass, POM, titanium, Hastelloy® C4
Float DK48 (AIII) CrNi steel 1.4571 / 316 Ti, Aluminium, PEEK
Metering unit CrNi steel 1.4571 / 316 Ti
Valve spindle CrNi steel 1.4404 / 316 L
Gaskets (standard) PTFE / FPM
Gaskets (optional) PTFE / FFKM, PTFE / EPDM
Gaskets (optional) EPDM, FFKM
Protective cover Polycarbonate
®
Temperatures
Max. temperature of medium T
Max. T
Min. temperature of medium T
Max. ambient temperature T
Max. T
Min. ambient temperature T
Other temperatures on request.
with limit switches +65°C +149°F
m
with limit switches +65°C +149°F
amb.
amb.
amb.
m
m
+100°C +212°F
-5°C +23°F
+100°C +212°F
-20°C -4°F
www.krohne.com07/2009 - 4000193403 TD DK46_800-R04 en
9
Page 10
2 TECHNICAL DATA
Technical Data Limit Switches
Terminal connection Connection box M16x1.5
Cable diameter 5...10 mm
Limit switch I7R2010-NL I7R2015-NL I7R2010-N I7R2015-N RB15-14-E2
Ring diameter 10 mm 15 mm 10 mm 15 mm 15 mm
Switching function bistable bistable monostable monostable bistable
NAMUR yes yes yes yes no
Connection technology 2-wire 2-wire 2-wire 2-wire 3-wire
Nominal voltage U
Current consumption 1mA passage ↓ 1 3 mA - ball outside
Current consumption 3mA passage ↑ 1 1 mA - ball in the limit
Operating voltage U
Operating current I 0…100 mA
No load current I 20 mA
Output Ua - passage ↓ ≤ 1 VDC 2
Output Ua - passage ↑ ≥ U
1 For devices with the valve at the top (at the outlet) and devices with outlet pressure regulators, the function is inverted!
2 For devices with the valve at the top in the output and devices with outlet pressure regulators, the function is inverted!
0
ext.
RC10-14-N3 RC15-14-N3 RC10-14-N0 RC15-14-N0
8 VDC 8 VDC 8 VDC 8 VDC
switch
DK46 - DK800
10…30 VDC
– 3 VDC 2
b
Field of application for limit switches
DK46, DK47, DK800 DK48
Ball Ring diameter Cone no. Ring diameter
Ø 4 mm / 0.158" 10 mm G 13.11 -
Ø 6 mm / 0.236" 15 mm G 14.06 -
Ø 8 mm / 0.315" - G 14.08 -
G 15.07 10 mm
G 15.09 10 mm
G 15.12 10 mm
G 16.08 10 mm
G 16.12 10 mm
G 17.08 15 mm
G 17.12 15 mm
G 18.06 -
G 18.08 -
G 18.12 -
The limit switches with ring diameters of 15mm as max. contact can only be used up to 60 l/h -
15.8 gph water or 2400 l/h - 89,3 scfh air (outer diameter of the measuring glass).
10
www.krohne.com 07/2009 - 4000193403 TD DK46_800-R04 en
Page 11
DK46 - DK800
2.2 Dimensions and weights
Dimensions
TECHNICAL DATA 2
Device a b
d f approx.
± 0.25
[mm] ["] [mm] ["] [mm] ["] [mm] ["]
DK46 111 4.37 90 3.55 45 1.77 82 3,2
DKR46 136 5,36 90 3,55 - - 125 4,92
DK800 146 5.75 125 4.92 80 3.15 82 3,2
DK47 196 7.72 175 6.89 130 5.12 82 3,2
DK48 346 13.6 325 12.8 280 11.0 82 3,2
c = 4,3 mm / 0,169"
e = 33 mm / 1,3"
f ca. 82 mm / 3,2"
g = 28 mm / 1,1"
Dimensions of panel cutout and faceplate
Device a c
[mm] ["] [mm] ["]
DK46 128 5.04 145 5.71
DK800 163 6.42 180 7.09
DK47 213 8.39 230 9.06
DK48 363 14.3 380 15.0
b = 32 mm / 1.26" d = 40 mm / 1.58"
e = 27.5 mm / 1.08"
www.krohne.com07/2009 - 4000193403 TD DK46_800-R04 en
11
Page 12
2 TECHNICAL DATA
Weights
Weight 0.4 0.88 0.5 1.1 0.6 1.3 0.7 1.5
Weights with regulator 2.1 4.6 2.2 4.9 2.3 5.1 2.4 5.3
Process connection
Standard ¼" NPT internal thread
Options G¼, Ermeto 6 or 8, tube connection 6 mm or 8 mm, Dilo, Gyrolok, Swagelok 1
1 other connection upon request
DK46 - DK800
DK46 DK800 DK47 DK48
[kg] [lbs] [kg] [lbs] [kg] [lbs] [kg] [lbs]
12
www.krohne.com 07/2009 - 4000193403 TD DK46_800-R04 en
Page 13
DK46 - DK800
2.3 Measuring ranges
Measuring span 10 : 1
Flow values 100%
Ball Ø DK46 DK47 DK800 DK(R)46 DK47 DK800
[mm] ["] [l/h] [gph] [l/h] [gph] [l/h] [gph] [l/h] [scfh] [l/h] [scfh] [l/h] [scfh]
4 0.158 2.5 0.65 - - 2.5 0.65 5 0,22 - - 5 0,18
6 0.236 5 1.3 5 1.3 5 1.3 100 3,8 250 9,5 100 3,8
60 1 16 1 60 16 60 16 1200145 1 - - 1000 38
TECHNICAL DATA 2
Water Air
- - - - - - 8 0,3 - - 8 0,3
- - - - - - 16 0,6 16 0,6 16 0,6
- - - - - - 40 1,5 40 1,5 40 1,5
- - - - - - 60 2,2 100 3,8 60 2,2
12 3.0 12 3.0 12 3.0 250 9,5 500 19 250 9,5
25 6.5 25 6.5 25 6.5 500 19 800 30 500 19
40 11 40 11 40 11 800 30 - - 800 30
100125 1 100 25 100 25 - - - - 1800 65
- - - - 120 30 - - - - 2400 90
- - - - 160 42 - - - - 3000 110
- - - - - - - - - - 4000 140
- - - - - - - - - - 5000 180
8 0.315 120130 1 - - - - - - - - - -
160142 1 - - - - - - - - - -
1 not for DKR46
Reference condition:
Water 20°C / 68°F
Air 20°C / 68°F - 1.2 bar abs. / 17.4 psi (in normal state)
Measuring range data for floats made of CrNi steel
Other flow ranges on request
Conversion to other media or operating data (pressure, temperature, density, viscosity) takes
place using the calculation method in accordance with VDI /VDE Directive 3513.
www.krohne.com07/2009 - 4000193403 TD DK46_800-R04 en
13
Page 14
2 TECHNICAL DATA
Measuring ranges DK48
Measuring span 10 : 1
Flow values 100%
Material Stainless Steel Hardrubber Aluminium Stainless Steel
Cone no. [l/h] [gph] [l/h] [scfh] [l/h] [scfh] [l/h] [scfh]
G 13.11 1 0.4 0.1 - - 7 0.25 16 0.6
G 14.06 0.6 0.16 - - 12 0.45 25 0.95
G 14.08 1 0.25 - - 20 0.75 40 1.5
G 15.07 1.6 0.4 - - 30 1.1 60 2.2
G 15.09 2.5 0.65 - - 40 1.5 90 3.5
G 15.12 4 1.0 - - 60 2.2 140 5.0
G 16.08 6 1.6 - - 100 3.7 200 7.5
G 16.12 10 2.5 - - 160 6.0 300 11
G 17.08 16 4.0 - - 250 9.0 500 19
G 17.12 25 6.5 - - 400 15 800 30
G 18.06 40 10 400 15 600 22 1200 45
G 18.08 63 16 600 22 1000 37 2000 75
G 18.12 100 25 1000 37 1600 60 3000 110
1 reduced accuracy : 2.5%
DK46 - DK800
Water Air
Reference condition:
Water 20°C / 68°F
Air 20°C / 68°F - 1.013 bar abs. / 14.7 psi (in normal state)
Measuring range data for floats made of CrNi steel
Other flow ranges on request
Conversion to other media or operating data (pressure, temperature, density, viscosity) takes
place using the calculation method in accordance with VDI /VDE Directive 3513.
14
www.krohne.com 07/2009 - 4000193403 TD DK46_800-R04 en
Page 15
DK46 - DK800
Valves
TECHNICAL DATA 2
Max. flowrate Valve characteristic
value
Valve spindle Water Air Kv Cv
Ø [mm] Ø [inches] [l/h] [gph] [l/h] [scfh]
1 0.039 5 1.3 100 3,7 0.018 0,02
2.5 0.98 50 13 1000 37 0.15 0,17
4.5 0.177 160 42 4300 160 0.48 0,55
[m3/h]
[gpm]
Valve characteristics
Spindle Ø 1.0mm - 0,039" Spindle Ø 2.5mm - 0,098"
Spindle Ø 4.5mm - 0,177"
1 Flow, air
2 Flow, water
3 Spindle revolution n
www.krohne.com07/2009 - 4000193403 TD DK46_800-R04 en
15
Page 16
2 TECHNICAL DATA
2.4 Differential pressure regulators
Differential pressure regulators are used to guarantee constant flow during fluctuating inlet and
outlet pressure. Minimum pressures are required to operate the regulators (see regulator
characteristics).
Differential pressure regulators are not equivalent to pressure reducing valves!
Differential pressure regulators are not equivalent to pressure reducing valves!
Differential pressure regulators are not equivalent to pressure reducing valves!Differential pressure regulators are not equivalent to pressure reducing valves!
1111 Inlet pressure regulators, type RE, NRE
Inlet pressure regulators, type RE, NRE
Inlet pressure regulators, type RE, NRE Inlet pressure regulators, type RE, NRE
The regulators keep the flow rate constant in the case of a variable inlet pressure and a constant
outlet pressure.
DK46 - DK800
Example - inlet pressure
regulator RE1000:
Current flow rate: 1000 l/h air
Outlet pressure p2 constant: 1.013 bar abs.
The flow rate in the meter remains constant with a fluctuating inlet pressure greater than 0.5
bar.
2222 Outlet pressure regulator, type RA, NRA
Outlet pressure regulator, type RA, NRA
Outlet pressure regulator, type RA, NRA Outlet pressure regulator, type RA, NRA
The regulators keep the flow rate constant in the case of a constant inlet pressure and a variable
outlet pressure. There must be a pressure differential between the inlet and the outlet pressure
for the outlet pressure regulator to function. The inlet pressure p1 must always be greater than
the outlet pressure p2.
Example - outlet pressure
regulator NRA 800
Current flow rate: 800 l/h air
Inlet pressure constant: 6 bar
The flow rate in the meter remains constant with a fluctuating outlet pressure of 0 ... 5.5 bar.
Regulator characteristics
1 Inlet pressure regulators, type RE and NRE 2 Outlet pressure regulators, type RA and
NRA
16
www.krohne.com 07/2009 - 4000193403 TD DK46_800-R04 en
Page 17
DK46 - DK800
Control range inlet pressure regulator 1
Control ranges outlet pressure regulator 2
TECHNICAL DATA 2
Max. flowrate
Water Air Min. inlet pressure
[l/h] [gph] [l/h] [scfh] Δ p1 [bar] Δ p1 [psig]
RE-1000 ...40 ...10.6 ...1000 ...37,2 0.5 0.007
RE-4000 ...80 ...21.1 ...2000 ...74,4 1 0.015
...100 ...26.4 …3000 ...112 1.5 0.022
...160 ...42.3 ...4000 ...149 2 0.029
NRE-100 ...2.5 ...0.66 ...100 ...3,72 0.1 0.001
NRE-800 - - …250 ...9,3 0.1 0.001
- - …800 ...29,8 0.2 0.003
...25 ...6.60 - - 0.4 0.006
Max. flowrate
Water Air Min. pressure diff.
[l/h] [gph] [l/h] [scfh] [bar] [psig]
RA-1000 ...40 ...10.6 ...1000 ...37,2 0.5 0.007
RA-4000 ...100 ...26.4 …2000 ...74,4 1 0.015
- - ...3000 ...112 1.5 0.022
...160 ...42.3 ...4000 ...149 2 0.029
NRA-800 ...1 ...0.264 ...250 ...9,3 0.1 0.001
- - ...500 ...18,6 0.2 0.003
- - …800 ...29,8 0.2 0.003
...25 ...6.60 - - 0.4 0.006
Technical data, differential pressure regulator
Standard connection ¼" NPT
Optional Serto, Ermeto 6 or 8, tube nozzle 6 mm or 8 mm,Dilo, Gyrolok, Swagelok,
Max. operating gauge
pressure PS
Product temperature TS = 100 °C / 212 °F 3
Material CrNi steel 1.4404
Gasket PTFE 4
Membrane PTFE filled with carbon / graphite
O-ring FPM 4
1 other connections on request
2 higher pressures on request
3 higher temperatures on request
4 other materials on request
G¼ 1
10 bar / 145 psig
4 bar / 58 psig for DK.../PV 2
www.krohne.com07/2009 - 4000193403 TD DK46_800-R04 en
17
Page 18
2 TECHNICAL DATA
Dimensions with the differential pressure regulator
DK46 - DK800
a
b c d e f
approx.
[mm] ["] [mm] ["] [mm] ["] [mm] ["] [mm] ["] [mm] ["]
DK46 210 8.27 163 6.42 70 2.76 19 0.75 39 1.54 90 3.55
DK47 210 8.27 233 9.18 70 2.76 19 0.75 39 1.54 90 3.55
DK48 210 8.27 383 15.1 70 2.76 19 0.75 39 1.54 90 3.55
DK800 210 8.27 183 7.21 70 2.76 19 0.75 39 1.54 90 3.55
1 DK with inlet pressure regulator 2 DK with outlet pressure regulator
approx.
18
www.krohne.com 07/2009 - 4000193403 TD DK46_800-R04 en
Page 19
DK46 - DK800
3.1 Intended use
The variable area flowmeters are suitable for measuring gases, vapors and liquids.
These flowmeters are particularly suitable for measuring:
• Liquids
• Hydrocarbons
• Water
• Chemicals with low corrosiveness
• Industrial gases
In case of instruments which are used in explosive endangered areas please consider the
supplementary installation and operating instructions mentioned in the Ex-manual.
The operator shall bear sole responsibility for the use of the flowmeters with regard to
suitability, intended use and corrosion resistance of the materials used to the process product.
The manufacturer shall not be liable for any damage resulting from improper use or use for
other than the intended purpose.
Do not use any abrasive or highly viscous process products.
INSTALLATION 3
3.2 Installation conditions
3.2.1 Installation in the piping
When installing the device in the piping, the following points must be observed:
•
The variable area flowmeter must be installed vertically (measuring principle). Flow direction
from bottom to top. For installation recommendations please refer also to VDI/VDE 3513
Sheet 3.
•
Before connecting, blow or flush out the pipes leading to the device.
•
Pipes for gas flow need to be dried before the device is installed.
•
Use connectors suitable for the particular device version.
•
Align the pipes axially with the connections on the measuring device so they are free of
stresses.
•
If necessary, support the piping to reduce vibrations being transmitted to the measuring
device.
•
Do not lay signal cables directly next to cables for the power supply.
www.krohne.com07/2009 - 4000193403 TD DK46_800-R04 en
19
Page 20
4 ELECTRICAL CONNECTIONS
4.1 Limit switch
The flowmeters can be equipped with a maximum of two limit switches. The switching function of
the limit switch can be designed as monostable or bistable.
Monostable function:
Monostable function: Switching pulse as float passes through switching point, independent of
Monostable function: Monostable function:
direction of movement.
Bistable function:
Bistable function: Stable changeover as float passes through switching point.
Bistable function: Bistable function:
DK46 - DK800
Example
Float above limit: Output "High"
(bistable):
Float below limit: Output "Low"
For switching patterns and electrical connection values of different limit switches, see Technical Data - Limit Switches
Electrical connection limit switches - 2-wire NAMUR
1 Lower limit switch to terminal 1
2 Upper limit switch to terminal 2
The terminal box includes an EMC filter unit.
Electrical connection limit switches - 2-wire NAMUR no terminal box
20
1 Limit switch (no terminal box)
2 Blue cable -
3 Brown cable +
4 External EMC filter
5 Receiver device
When connecting to an EMC filter, the ground terminal must be connected to the back rail of the
flowmeter.
Electrical connection limit switch - 3-wire (transistor)
bn - brown: supply voltage +
bk - black - switch
bu - blue: supply voltage -
www.krohne.com 07/2009 - 4000193403 TD DK46_800-R04 en
Page 21
DK46 - DK800
Please provide us with the missing information so that we can be of help to you as quickly as
possible.
Then please fax this page to the appropriate sales associate. We will then contact you as soon as
possible.
Device data
1 1 limit switch
2 2 limit switches
ORDER FORM 5
Connection type: 1/4" NPT (other)
Connection: horizontal vertical
Pressure rating:
Device DK46 DK47 DK48 DK800
Options: K1 1
K2 2
Differential pressure regulator: Intlet pressure regulator Outlet pressure regulator
Approval: Without ATEX
K1 1
K2 2
K1 1
K2 2
K1 1
K2 2
Rating data
Product:
Operating pressure: Absolute pressure Overpressure
Rated pressure:
Operating temperature:
Rated temperature:
Density: Standard density Operating density
Viscosity:
Measuring range:
Comments:
Contact data
Company:
Contact person:
Telephone number:
Fax number:
E-mail:
www.krohne.com07/2009 - 4000193403 TD DK46_800-R04 en
21
Page 22
6 NOTES
DK46 - DK800
22
www.krohne.com 07/2009 - 4000193403 TD DK46_800-R04 en
Page 23
DK46 - DK800
NOTES 6
www.krohne.com07/2009 - 4000193403 TD DK46_800-R04 en
23
Page 24
K
K
K
KROHNE product overview
• Electromagnetic flowmeters
• Variable area flowmeters
• Ultrasonic flowmeters
• Mass flowmeters
• Vortex flowmeters
• Flow controllers
• Level meters
• Temperature meters
• Pressure meters
• Analysis products
• Measuring systems for the oil and gas industry
• Measuring systems for sea-going tankers
© KROHNE 07/2009 - 4000193403 TD DK46_800-R04 en - Subject to change without notice.
Head Office KROHNE Messtechnik GmbH & Co. KG
Ludwig-Krohne-Str. 5
D-47058 Duisburg (Germany)
Tel.:+49 (0)203 301 0
Fax:+49 (0)203 301 10389
info@krohne.de
The current list of all KROHNE contacts and addresses can be found at:
www.krohne.com
Loading...