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DK46I
User Manual
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KROHNE DK46I, DK47I User Manual

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DK46I - DK47I
DK46I - DK47I
DK46I - DK47IDK46I - DK47I
Variable area flowmeter
Handbook
Handbook
HandbookHandbook
Page 2
CONTENTS
1 Safety instructions......................................................................... 4
1.1 Intended use......................................................................................................... 4
1.2 Certifications........................................................................................................ 4
1.3 Safety instructions from the manufacturer......................................................... 5
1.3.1 Copyright and data protection................................................................................... 5
1.3.2 Disclaimer.................................................................................................................. 5
1.3.3 Product liability and warranty ................................................................................... 6
1.3.4 Information concerning the documentation .............................................................6
1.3.5 Display conventions................................................................................................... 7
1.4 Safety instructions for the operator .................................................................... 7
2 Instrument description.................................................................. 8
2.1 Scope of supply .................................................................................................... 8
2.2 Device versions .................................................................................................... 9
2.2.1 Versions .....................................................................................................................9
2.2.2 Versions with regulator .............................................................................................9
2.3 Nameplate.......................................................................................................... 10
2.4 Description code ................................................................................................ 11
DK46I - DK47I
3 Installation................................................................................... 12
3.1 Notes on installation.......................................................................................... 12
3.2 Storage............................................................................................................... 12
3.3 Installation requirements .................................................................................. 13
3.3.1 Installing in the pipeline ......................................................................................... 13
3.4 Start-up .............................................................................................................. 13
4 Electrical connections ................................................................. 14
4.1 Safety instructions ............................................................................................. 14
4.2 Limit switches .................................................................................................... 14
4.3 Setting the limit switch ...................................................................................... 16
4.4 Minimum clearance between two limit switches.............................................. 17
4.5 Switching performance...................................................................................... 17
4.6 Conversion of the function................................................................................. 18
5 Service......................................................................................... 19
5.1 Maintenance....................................................................................................... 19
5.2 Spare parts availability ...................................................................................... 21
5.3 Availability of services........................................................................................ 21
5.4 Returning the device to the manufacturer ........................................................ 22
5.4.1 General information ................................................................................................ 22
5.4.2 Form (for copying) to accompany a returned instrument ......................................23
5.5 Disposal.............................................................................................................. 23
6 Technical data ............................................................................. 24
6.1 Functional principle ........................................................................................... 24
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7 KROHNE measuring technology - Product overview................... 36
CONTENTS
6.2 Technical data.................................................................................................... 25
6.3 Dimensions and weights.................................................................................... 27
6.4 Measuring ranges .............................................................................................. 28
6.5 Differential pressure regulators ....................................................................... 30
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1 SAFETY INSTRUCTIONS
1.1 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
WARNING!
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.
DK46I - DK47I
1.2 Certifications
The flowmeter meets the statutory requirements of the following EC directives:
• Pressure Equipment Directive 97/23/EC
• EMC Directive 89/336/EC for instruments with electrical options
KROHNE Messtechnik GmbH & Co. KG certifies successful testing of the product by providing the CE Declaration of Conformity.
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1.3 Safety instructions from the manufacturer
1.3.1 Copyright and data protection
The contents of this document have been created with great care. Nevertheless, we provide no guarantee that the contents are correct, complete or up-to-date.
The contents and works in this document are subject to German copyright. Contributions from third parties are identified as such. Reproduction, processing, dissemination and any type of use beyond what is permitted under copyright requires written authorisation from the respective author and/or the manufacturer.
The manufacturer tries always to observe the copyrights of others, and to draw on works created in-house or works in the public domain.
The collection of personal data (such as names, street addresses or e-mail addresses) in the manufacturer's documents is always on a voluntary basis whenever possible. Whenever feasible, it is always possible to make use of the offerings and services without providing any personal data.
SAFETY INSTRUCTIONS 1
We draw your attention to the fact that data transmission over the Internet (e.g. when communicating by e-mail) may involve gaps in security. It is not possible to protect such data completely against access by third parties.
We hereby expressly prohibit the use of the contact data published as part of our duty to publish an imprint for the purpose of sending us any advertising or informational materials that we have not expressly requested.
1.3.2 Disclaimer
The manufacturer will not be liable for any damage of any kind by using its product, including, but not limited to direct, indirect, incidental, punitive and consequential damages.
This disclaimer does not apply in case the manufacturer has acted on purpose or with gross negligence. In the event any applicable law does not allow such limitations on implied warranties or the exclusion of limitation of certain damages, you may, if such law applies to you, not be subject to some or all of the above disclaimer, exclusions or limitations.
Any product purchased from the manufacturer is warranted in accordance with the relevant product documentation and our Terms and Conditions of Sale.
The manufacturer reserves the right to alter the content of its documents, including this disclaimer in any way, at any time, for any reason, without prior notification, and will not be liable in any way for possible consequences of such changes.
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1 SAFETY INSTRUCTIONS
1.3.3 Product liability and warranty
The operator shall bear responsibility for the suitability of the device for the specific purpose. The manufacturer accepts no liability for the consequences of misuse by the operator. Improper installation and operation of the devices (systems) will cause the warranty to be void. The respective "Standard Terms and Conditions" which form the basis for the sales contract shall also apply.
1.3.4 Information concerning the documentation
To prevent any injury to the user or damage to the device it is essential that you read the information in this document and observe applicable national standards, safety requirements and accident prevention regulations.
If this document is not in your native language and if you have any problems understanding the text, we advise you to contact your local office for assistance. The manufacturer can not accept responsibility for any damage or injury caused by misunderstanding of the information in this document.
DK46I - DK47I
This document is provided to help you establish operating conditions, which will permit safe and efficient use of this device. Special considerations and precautions are also described in the document, which appear in the form of underneath icons.
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1.3.5 Display conventions
The following symbols are used to help you navigate this documentation more easily:
WARNING!
These warning signs must be observed without fail. Even only partial disregarding such warnings can result in serious health damage, damage to the device itself or to parts of the operator
DANGER!
This symbol designates safety advice on handling electricity.
CAUTION!
These warnings must be observed without fail. Even only partial disregarding such warnings can lead to improper functioning of the device.
’
s plant.
SAFETY INSTRUCTIONS 1
LEGAL NOTICE!
This symbol designates information on statutory directives and standards.
NOTE!
This symbol designates important information for the handling of the device.
• HANDLING
HANDLING
HANDLINGHANDLING
This symbol designates all instructions for actions to be carried out by the operator in the specified sequence.
i CONSEQUENCE
CONSEQUENCE
CONSEQUENCECONSEQUENCE This symbol designates all important consequences of the previous actions.
1.4 Safety instructions for the operator
WARNING!
In general, devices from the manufacturer may only be installed, commissioned, operated and maintained by properly trained and authorized personnel. This document is provided to help you establish operating conditions, which will permit safe and efficient use of this device.
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2 INSTRUMENT DESCRIPTION
2.1 Scope of supply
NOTE!
Inspect the cartons carefully for damage or signs of rough handling. Report damage to the carrier and to your local office.
NOTE!
Check the packing list to make sure that you have received your complete order.
NOTE!
Please check on the device nameplates, that the device is supplied according to your order. Check for the correct mains voltage printed on the nameplate. If not, contact your local representative for advice.
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Figure 2-1: Scope of supply
1 Flowmeter in the version ordered 2 Manual 3 Certificates, calibration certificate (supplied to order only)
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2.2 Device versions
2.2.1 Versions
INSTRUMENT DESCRIPTION 2
Figure 2-2: Device versions
1 DK46I with valve and an overall length of 135 mm (5.32 inch) 2 DK47I with valve and an overall length of 245 mm (9.65 inch)
2.2.2 Versions with regulator
Figure 2-3: DK47I with differential pressure regulators
1 DK47I with inlet pressure regulator 2 DK47I with outlet pressure regulator
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2 INSTRUMENT DESCRIPTION
2.3 Nameplate
INFORMATION!
Before installing the flowmeter, make sure that the information given on the nameplate corresponds to the ordering data.
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Figure 2-4: Nameplates (Examples)
1 Type of meter 2 Manufacturer 3 KROHNE website 4 Design data: temperature & pressure rating 5 DGRL data
Additional markings on the flowmeter
• SN - serial number
• SO - sales order / item
• Tag-No - measuring point (customer spec.)
• MD - year of manufacture
• KO - KROHNE order
• Vx - product configurator code
• AC - article code
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2.4 Description code
The description code consists of the following elements*:
1 R - With integral inlet pressure regulator (only DKR46)
2 Instrument type:
46I - Measuring cone overall length 65 mm 47I - Measuring cone overall length 150 mm
3 Material for top and bottom fittings:
R - Stainless steel
4 Differential pressure regulator:
RE - Inlet pressure regulator RA - Outlet pressure regulator
INSTRUMENT DESCRIPTION 2
5 K1 - one limit switch
K2 - two limit switches
* positions which are not needed are omitted (no blank positions)
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3 INSTALLATION
3.1 Notes on installation
NOTE!
Inspect the cartons carefully for damage or signs of rough handling. Report damage to the carrier and to your local office.
NOTE!
Check the packing list to make sure that you have received your complete order.
NOTE!
Please check on the device nameplates, that the device is supplied according to your order. Check for the correct mains voltage printed on the nameplate. If not, contact your local representative for advice.
DK46I - DK47I
3.2 Storage
• Store the flowmeter in a dry and dust-free location.
• Avoid lasting direct exposure to the sun.
• Store the flowmeter in its original packaging.
• The permissible storage temperature is from -40 to +80°C for standard meters.
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3.3 Installation requirements
3.3.1 Installing in the pipeline
CAUTION!
When installing the flowmeter in the pipeline please observe the following points:
•
The variable area flowmeter has to be installed vertically (float measuring principle), flow direction from bottom to top. For installation recommendations please also refer to the Directive VDI/VDE 3513, Sheet 3.
•
Before installing the flowmeter, blow or flush out the pipeline leading to the flowmeter.
•
Pipelines for gas flow are to be dried before the flowmeter is installed.
•
Use connectors appropriate to the flowmeter version for the connection.
•
Align the pipes axially with the bolt holes on the flowmeter without incurring stresses.
•
If necessary, support the pipeline on both sides of the flowmeter in order to prevent vibration from being transferred to the flowmeter.
•
Do not lay signal cables directly next to cables for the power supply.
INSTALLATION 3
3.4 Start-up
CAUTION!
When starting up the flowmeter, the following points must be observed:
•
•
•
•
•
•
•
•
•
Compare the actual operating pressure and the process temperature of the system with the specifications on the nameplate (PS and TS); these limits must not be exceeded.
Make sure materials are compatible. Close the needle valve at the flowmeters. 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. Open needle valve at the flowmeters and set the required flow rate. The top edge of the float marks the reading line for flow values:
Figure 3-1: Reading edge
1 Reading edge 2 Dk46I, DK47I - floatform ball
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4 ELECTRICAL CONNECTIONS
4.1 Safety instructions
DANGER!
All work on the electrical connections may only be carried out with the power disconnected. Take note of the voltage data on the nameplate!
DANGER!
Observe national installation regulations!
WARNING!
Observe the regional occupational health and safety regulations without fail. Only work on the device electrics if you are appropriately trained.
NOTE!
Please check on the device nameplates, that the device is supplied according to your order. Check for the correct mains voltage printed on the nameplate. If not, contact your local representative for advice.
DK46I - DK47I
4.2 Limit switches
The flowmeter can be equipped with a maximum of two limit switches
Type RC...-N3 and RB...-E2 with bistable function Type RC...-N0 with monostable function
Function monostable: Switching pulse by transit of the float in the operating point, independently of the moving direction.
Function bistable: Stable changeover by transit of the float through the operating point.
Example: Float above limit: output "High"
Float below limit: output "Low"
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Electrical connection limit switches - 2-wire terminal box
1 lower limit switch - to terminal 1 2 upper limit switch - to terminal 2
The junction box includes an EMC filter unit.
ELECTRICAL CONNECTIONS 4
Electrical connection limit switches - 2-wire without terminal box
1 Limit switch (without terminal box) 2 Colour coding blue - 3 Colour coding brown + 4 external EMC filter 5 Receiver device
EMC filter unit and back rail of the flowmeter must be galvanically connected and grounded.
Electrical connection limit switch - 3-wire (RB...-E2)
• bn - brown: supply voltage +
• bk - black - switch
• bu - blue: supply voltage -
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4 ELECTRICAL CONNECTIONS
4.3 Setting the limit switch
Following procedure is to perform (DK../../K):
• Detach clamping screws 1
• Slide the limit switches over the measuring glass.
• Use the two clamping screws 1 to fasten the limit switch 3 to the back rail 1 of the
measuring device.
• Reinstall the protection cover after installation.
DK46I - DK47I
To install, first remove the measuring glass as described under chapter Maintenance.
CAUTION!
When setting the ring sensor, make sure the cable is laid such that it cannot be damaged! Avoid CANT - glass breakage!
The connecting lead for the limit switch is routed the hole in the device bottom fitting and sealed.
For bistable limit switches with external EMC filter in separate DIN-rail housing, observe the following: EMC filter unit and back rail of the flowmeter must be galvanically connected and grounded.
An isolation switching amplifier with intrinsically safe control circuits NAMUR is necessary for operation of the NAMUR limit switches.
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ELECTRICAL CONNECTIONS 4
4.4 Minimum clearance between two limit switches
Where two sensors are in one device, and also where DK glass devices with limit switches are arranged close together, minimum clearances must be maintained in order to avoid mutual influence of the switches.
Min. clearance RC… 2-wire RB… 3-wire
1 16 mm (0.63") 45 mm (1.773") 2 6 mm (0.236") 30 mm (1.182")
4.5 Switching performance
Limit switch RC...-N0 Ball outside sensor: Signal ≥3 mA Ball inside sensor: Signal ≤1 mA
Limit switch RC...-N3 Independent of ball position see image 1 : Signal ≥3 mA Pre condition: The ball is located outside the sensor.
NOTE!
To get a correct mode of operation after power on the limit switches RC...-N3 through for one time 1 and 2.
Limit switch RB...-E2 Independent of ball position like transit 2: Signal ≤1 V Pre condition: The ball is located outside the sensor.
RC...-N0
RC...-N0RC...-N0
RC...-N3
RC...-N3RC...-N3
RB...-E2
RB...-E2RB...-E2
RC...-N3 have to pass
RC...-N3RC...-N3
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4 ELECTRICAL CONNECTIONS
4.6 Conversion of the function
The bistable limit switch RC 10...N3 can be changed from NO to NC function.
The precut cable with connectors must be sufficiently long for this!
When setting the limit switch, make sure the cable is laid such that it cannot be damaged!
• Detach clamping screws 1
• Detach tensioning screw 2. Turn anti-clockwise.
• Carefully pull out the measuring glass together with the limit switch.
• Turn the limit switch 180°.
• Assemble in reverse order.
• Turn tensioning screw 2 hand-screwed
• Use a 3mm pin to tighten the lock nut with 4x ... max. 5x
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4x ... max. 5x, 120° turns 3 clockwise.
4x ... max. 5x4x ... max. 5x
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CAUTION!
To avoid glass breakage, the measuring glass must be inserted concentrically between the gaskets.
Before restarting the flowmeter, check leak-tightness by suitable means.
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5.1 Maintenance
Within the scope of routine maintenance of the system and pipelines, the flowmeter should also be inspected for signs of fouling, corrosion, mechanical wear and leaks, as well as damage to the measuring tube and indicator.
We advise that inspections be carried out at least once a year.
The device must be removed from the piping before cleaning.
CAUTION!
Pressurized pipes must be depressurized before removing the device. In the case of flowmeters used for measuring aggressive or hazardous products, appropriate safety precautions must be taken with regard to residual liquids in the measuring section. Always use new gaskets when reinstalling the flowmeter in the pipeline.
SERVICE 5
CAUTION!
Under certain circumstances the valve packing gland may have to be adjusted during its service life. This means that the union nut has to be retightened. If necessary, press the retaining pin against its internal spring. Apply a tightening torque of not more than 5 Nm.
CAUTION!
Valves that have not been actuated for a longer period of time may exhibit a higher initial actuation torque.
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5 SERVICE
Changing the measuring cone
• Close valve upstream and downstream of the device.
• Close needle valve.
• Push protective cover upwards and remove to front.
• Turn the lock nut in the device base 1 anti-clockwise.
Devices with a top and bottom fitting made of PVDF (DK.../PV) have a tensioning screw in the device head(Allen key 6mm). This can be unlocked with approx. 1 full turn.
The measuring glass can be removed to the front.
DK46I - DK47I
Figure 5-1: Mainenance
CAUTION!
Residual liquid or gas may leak out!
• Install in the reverse order:
• Fix the measuring glass in position by tightening the lock
nut finger-tight in the device base 1 first of all.
• Use a 3mm pin to tighten the lock nut with 4x ... max. 5x
4x ... max. 5x 120° turns clockwise. 2
4x ... max. 5x4x ... max. 5x
CAUTION!
To avoid glass breakage, the measuring glass must be inserted concentrically between the gaskets.
Before restarting the flowmeter, check leak-tightness by suitable means.
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5.2 Spare parts availability
The manufacturer adheres to the basic principle that operational spare parts for each device or each important accessory part will be kept available for a period of 10 (ten) years after delivery of the last production run for that device.
Operational spare parts are defined as parts that are subject to faults in normal operation.
5.3 Availability of services
The manufacturer offers a range of services to support the customer after expiration of the warranty. These include repair, technical support and training.
NOTE!
For more precise information, please contact your local representative.
SERVICE 5
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5 SERVICE
5.4 Returning the device to the manufacturer
5.4.1 General information
This device has been carefully manufactured and tested. If installed and operated in accordance with these operating instructions, it will rarely present any problems.
CAUTION!
Should you nevertheless need to return a device for inspection or repair, please pay strict attention to the following points:
•
Due to statutory regulations on environmental protection and safeguarding the health and safety of our personnel, manufacturer may only handle, test and repair returned devices that have been in contact with products without risk to personnel and environment.
•
This means that the manufacturer can only service this device if it is accompanied by the following certificate (see next section) confirming that the device is safe to handle.
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CAUTION!
If the device has been operated with toxic, caustic, flammable or water-endangering products, you are kindly requested:
•
to check and ensure, if necessary by rinsing or neutralizing, that all cavities are free from such dangerous substances,
•
to enclose a certificate with the device confirming that is safe to handle and stating the product used.
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5.4.2 Form (for copying) to accompany a returned instrument
Company: Address:
Department: Name:
Tel. no.: Fax no.:
Manufacturer's order no. or serial no.:
The device has been operated with the following medium:
SERVICE 5
This medium is: water-hazardous
toxic caustic flammable We checked that all cavities in the device are free from such
substances. We have flushed out and neutralized all cavities in the
device.
We hereby confirm that there is no risk to persons or the environment through any residual media contained in the device when it is returned.
Date: Signature:
Stamp:
5.5 Disposal
CAUTION!
Disposal must be carried out in accordance with legislation applicable in your country.
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6 TECHNICAL DATA
6.1 Functional principle
The flowmeter operates on the float measuring principle.
The measuring section 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 A acting on it, the form drag W and its weight G are in equilibrium.
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G = A + W
Figure 6-1: Operating principle
The flow-dependent height of the float can take reading on a scale of the measuring glass.
The top edge of the float marks the reading line for flow values.
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6.2 Technical data
Application range Flow measurement of liquids and gases Measuring accuracy Directive VDI / VDE 3513, sheet 2 DK46 I Class 4 DK47 I Class 2.5 Operating pressure PS Pressure equipment directive 97/23/EC Test pressure PT Pressure equipment directive 97/23/EC Max. perm. operating gauge press. PS at TS =
212°F (100°C) DK…/R (head piece and foot piece made from
stainless steel) DK…/N (head piece and foot piece made from
brass)
1 higher pressures upon request
TECHNICAL DATA 6
145 psig (10 bar) 1
145 psig (10 bar) 1
Materials
Head piece, foot piece CrNi steel 1.4404 / 316 L, nickle-plated brass Head piece, foot piece optional Hastelloy Measuring tube Borosilicate glass Float (sphere) CrNi steel 1.4401 / 316 Float options Glass, POM, titanium, Hastelloy C4 DK48 float (All) CrNi steel 1.4571 / 316 titanium, aluminum, PEEK, glass Metering unit CrNi steel 1.4571 / 316 Ti Valve spindle CrNi steel 1.4404 / 316 L Standard seals PTFE / FPM Seals options PTFE / FFKM, PTFE / EPDM Seals options EPDM, FFKM Protective cover Polycarbonate
Temperatures
Temperatures
TemperaturesTemperatures
Max. temperature of medium Tm +212°F (+100°C)
Max. Tm with limit switches +149°F (+65°C)
Min. temperature of medium Tm +23°F (-5°C) 1
Max. ambient temperature Tamb. +212°F (+100°C)
Max. Tamb. with limit switches +149°F (+65°C)
Min. ambient temperature Tamb. -4°F (-20°C) 1
1 other temperatures upon request
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6 TECHNICAL DATA
Technical data limit switches
Technical data limit switches
Technical data limit switchesTechnical data limit switches
Clamp-type terminal Connection box M16 x 1.5 - Cable diameter 5...10 mm Limit switches RC10-14-N3 RC15-14-N3 RC10-14-N0 RC15-14-N0 RB15-14-E2 Switching function Bistable Bistable Monostable Monostable Bistable, 3-
Connection technology NAMUR, two-
Rated voltage U0 8 VDC 8 VDC 8 VDC 8 VDC Current consumption 1 mA passage ↓ 3 mA - sphere beyond Current consumption 3 mA passage ↓ 1 mA - sphere is in limit
Operating voltage Ub 10…30 VDC Operating current Ib 0…100mA No-load current 20mA Output Ua - passage ↓ ≤ 1 VDC Output Ua - passage ↑ ≥ Ub – 3 VDC
wire
NAMUR, two­wire
NAMUR, two­wire
monitor
NAMUR, two­wire
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wire Three-wire
Application range of limit switches
Application range of limit switches
Application range of limit switchesApplication range of limit switches
DK46 I, DK47 I
Sphere Limit switches
Ø 4mm RC10 Ø 6 mm RC15 / RB15 Ø 8 mm -
The limit switches RC15 and RB15 (as max. contact) can only be used for up to 60 l/h (16 gal/h) water (external diameter of the measuring glass).
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6.3 Dimensions and weights
Dimensions
Dimensions
DimensionsDimensions
TECHNICAL DATA 6
[inch] [mm]
DK46 I 5.32
DK47 I 9.65
Weights
Weights
WeightsWeights
Device DK46 I DK47 I
Weight [kg] 0.5 0.7 Weight with regulator 2.1 2.3
Process connection
Process connection
Process connectionProcess connection
a
135
245
b
± 0.01
± 0.25
4.49
8.82
114
224
c d e f
0.17
4.3
0.17
4.3
1.77 45
5.12
130
1.30 33
1.30 33
approx.
3.23
3.23
82
82
g
1.1 28
1.1 28
Standard 1/4" NPT internal thread Options G 1/4, Ermeto 6 or 8, tube connection 6 mm or 8
mm, Dilo, Gyrolok, Swagelok
1 other connections upon request
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6 TECHNICAL DATA
6.4 Measuring ranges
Measuring span 10 : 1 Flow values 100%
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Water Air
Sphere Ø
mm
4 0.65 2.5 - - 0.22 5 - ­4 - - - - 0.3 8 - ­4 - - - - 0.6 16 0.6 16 4 - - - - 1.5 40 1.5 40 4 - - - - 2.5 60 3.8 100 6 1.3 5 1.3 5 3.8 100 - ­6 3 12 3 12 9 250 9 250 6 6.5 25 6.5 25 18 500 18 500 6 11 40 11 40 30 800 30 800 6 16 60 16 60 45 1200 - ­6 25 100 25 100 - - - ­8 30 120 - - - - - ­8 42 160 - - - - - -
DK46 I DK47 I DK46 I DK47 I
[GPH] [l/h] [GPH] [l/h] [SCFH] [l/h] [SCFH] [l/h]
Reference condition: water 68°F (20°C) air 68°F (20°C), 17.4 psi (1.2 bar abs.) in a standard state
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Other flow rate measuring ranges can be provided upon request.
The conversion of other materials or operating data (pressure, temperature, density, viscosity) is done with the help of the calculation procedure as detailed in Directive VDI /VDE 3513
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Valves
Valve characteristics
TECHNICAL DATA 6
Max flowrate
Water [l/h] Air [l/h]
Spindle Ø [mm]
1 1.32 5 3.5 100 0.021 0.018
2.5 13.2 50 35 1000 0.17 0.15
4.5 42.3 160 177 5000 0.56 0.48
[GPH] [l/h] [SCFH] [l/h] [gal/min] [m3/h]
spindle Ø 1.0mm spindle Ø 2.5mm
CV/Kv valve characteristic value
spindle Ø 4.5mm
1 Flow, air 2 Flow, water 3 Spindle rotation n
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6 TECHNICAL DATA
6.5 Differential pressure regulators
Differential pressure regulators are used to provide constant flow rates in the case of variable inlet or outlet pressures. Minimum pressure levels are necessary to operate the regulators (see regulator characteristics).
Differential pressure regulators are not pressure reducing valves.
Differential pressure regulators are not pressure reducing valves.
Differential pressure regulators are not pressure reducing valves.Differential pressure regulators are not pressure reducing valves.
1 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.
DK46I - DK47I
Example - inlet pressure regulator RE1000:
Current flow rate:
Outlet pressure p2 constant: 14.7 psi (1.013 bar abs.)
3
/h (1000 l/h) air
35 ft
The flow rate is constant in the device in the case of a fluctuating inlet pressure greater than 7.3 psig (0.5 bar).
2 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:
Inlet pressure constant: 87 psig (6 bar)
28.3 ft
3
/h (800 l/h) air
The flow rate is constant in the device in the case of a fluctuating outlet pressure of 0 ... 80 psig (5.5 bar).
Regulator characteristics
Regulator characteristics
Regulator characteristicsRegulator characteristics
30
1 Inlet pressure regulators, type RE and
NRE
2 Outlet pressure regulators, type RA and
NRA
Page 31
DK46I - DK47I
Control ranges
Control ranges
Control rangesControl ranges
TECHNICAL DATA 6
Inlet pressure regulator
Max flow rate
Water Air Min. inlet pressure Up1
[gal/h] [l/h] [ft3/h] [l/h] [psig] [bar]
RE-1000 ...10 ...40 ...35 ...1000 7.3 0.5 RE-4000 ...21 ...80 ...70 ...2000 14.5 1
...26 ...100 ...106 …3000 21.8 1.5
...42 ...160 ...141 ...4000 29 2 NRE-100 ...0.66 ...2.5 ...3.5 ...100 1.5 0.1 NRE-800 ...8.8 ...250 1.5 0.1
...28 ...800 2.9 0.2
...6.6 ...25 5.8 0.4
Outlet pressure regulator
Max flow rate
Water Air Min. pressure diff.
[gal/h] [l/h] [ft3/h] [l/h] [psig] [bar]
RA-1000 ...10 ...40 ...35 ...1000 7.3 0.5 RA-4000 ...26 ...100 ...70 …2000 14.5 1
...106 ...3000 21.8 1.5
...42 ...160 ...141 ...4000 29 2 NRA-800 ...0.26 ...1 ...8.8 ...250 1.5 0.1
...18 ...500 2.9 0.2
...6.6 ...25 ...28 ...800 5.8 0.4
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6 TECHNICAL DATA
Technical data, differential pressure regulator
Technical data, differential pressure regulator
Technical data, differential pressure regulatorTechnical data, differential pressure regulator
Standard connection 1/4" NPT Option Serto, Ermeto 6 or 8, tube nozzle 6 mm or 8 mm,
Max. operating gauge pressure PS 145 psig (10 bar) 2 Material CrNi-Steel 1.4404 Temperature TS = 212°F (100 °C)
1 other connections upon request 2 higher pressures upon request 3 higher temperatures upon request
Dimensions with the differential pressure regulator
Dimensions with the differential pressure regulator
Dimensions with the differential pressure regulatorDimensions with the differential pressure regulator
DK46I - DK47I
Dilo, Gyrolok, Swagelok, G 1/4 1
3
Dimensions
[inch] [mm]
DK46 I 8.27
DK47 I 8.27
a
approx.
210
210
b c
approx.
7.37 187
11.11 282
0.51 13
0.51 13
d e f
approx.
2.76 70
2.76 70
0.75 19
0.75 19
1.54 39
1.54 39
DK with inlet pressure regulator DK with outlet pressure regulator
g
3.55 90
3.55 90
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DK46I - DK47I
.
TECHNICAL DATA 6
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6 TECHNICAL DATA
.
DK46I - DK47I
34
Page 35
DK46I - DK47I
.
TECHNICAL DATA 6
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DK46I - DK47I nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn
nn
KROHNE measuring technology - Product overview
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