Burkert 8742 Mass Flow Controller Data Sheet
Burkert 8742 is a versatile Mass Flow Controller/Mass Flow Meter designed for precise gas flow control and measurement in a wide range of applications. With its high accuracy (±0.8% of reading ±0.3% full scale), fast response time (<300 ms), and wide flow range (10 mlN/min to 160 lN/min for N2), it ensures reliable and efficient gas flow management. Ideal for industries such as metal and glass manufacturing, fermentation processes, test benches, filling systems, and packaging machines.
Mainos
Mainos
DATA SHEET
Type 8742
Mass Flow Controller (MFC)/ Mass Flow Meter (MFM) for gases
• Nominal flow ranges from 0.010 l
N
/min to 160 l
N
/min
• Highest measuring accuracy and repeatability with very fast re
-
sponse times
• Long-term stability of the flow calibration
• Easy device exchange due to configuration memory
• Optional: ATEX II Cat. 3G/D or USP Class VI, FDA, EG 1935 con
-
formity
Product variants described in the data sheet may differ from the product presentation and description.
Can be combined with
Type 6011
Plunger valve 2/2 way direct-acting
Type 6013
Plunger valve 2/2 way direct-acting
Type 6027
Direct-acting 2/2 way plunger valve
Type 0330
Direct-acting 2/2 or
3/2-way pivoted arma ture valve
Type ME43
Fieldbus gateway
Type description
The Mass Flow Controller (MFC) / Mass Flow Meter (MFM) Type 8742 for gas es is suitable for a wide range of applications, e.g. metal and glass manufac turing or processing, fermentation processes, test benches or filling systems and packaging machines. Type 8742 is available in two variants: The variant with several analogue or digital (communication) interfaces and the variant with only a CANopen-based interface. The latter is suitable for integration into existing CANopen networks or - in combination with the fieldbus gateway
Type ME43 - for integration in all common industry standards for Industrial
Ethernet or fieldbus. This variant is tailor-made for applications with many control loops. Up to 32 MFCs/ MFMs can be connected to one fieldbus gate way. Type ME43 transmits the internal CANopen-based communication to
Industrial Ethernet and fieldbus standards. The Mass Flow Controller / Mass
Flow Meter can always be switched between büS and CANopen communica tion. Type 8742 can be configured as required as an MFM or MFC. Optionally, up to four calibration curves can be stored in the device. The thermal MEMS sensor is located directly in the gas flow and achieves very fast response times and the highest level of measuring accuracy, with long-term stable calibration. As the actuator, a Bürkert direct-acting proportional valve guaran tees high response sensitivity. The integrated PI controller ensures excellent control characteristics of the MFC. Type 8742 is especially designed for use in harsh environments thanks to its high IP protection class and explosion protection.
Type ME63
Industrial Ethernet gateway, IP65/ IP67/ IP69k
1000236628 | Standard | EU | en | 202108 | 17
© Christian Bürkert GmbH & Co. KG, Subject to alteration
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Type 8742
Table of contents
5. Device/Process connections 13
6. Performance specifications 14
8. Product design and assembly 15
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Type 8742
1. General Technical Data
Product properties
Materials
Body
Housing
Seal
Dimensions
Total weight
Stainless steel or aluminium
Aluminium die casting (coated)
FKM or EPDM (depending on gas)
approx. 950 g (stainless steel body)
Configuration memory (included in delivery)
LED display
Performance data
Nominal flow range (Q
Measuring range
Nom
Max. operating pressure
Measuring accuracy
)
EEPROM (μSIM card: stores all parameters (e.g. individual fieldbus or controller set tings) relevant for device replacement without software tool)
RGB-LED based on NAMUR NE107
10 ml
N
/min…160 l
N
/min (N
2
)
1:50, optional 1:100
10 bar (145 psi), for MFCs the max. pressure depends on the orifice of the valve
± 0.8 % o.R. ± 0.3 % F.S. (after 1 min warm up time)
Repeatability ± 0.1 % F.S.
Settling (MFC)/response (MFM) time (t
95 %
) < 300 ms
-
Control valve (prop. valve)
Valve orifice range k
VS
value range
Electrical data
Operating voltage
Power consumption
Operating medium
Calibration medium
1.)
Voltage tolerance
Residual ripple
Electrical connection
Medium data
Medium temperature
Normally closed
0.05…8 mm
0.00006…1.1 m 3 /h
24 V DC
1 W (as MFM)
Max. 3…17.5 W (as MFC, depending on type of solenoid control valve)
± 10 %
± 2 %
M12 plug, 5 pin
Neutral, non-contaminated gases, others on request
Operating gas or air
- 10 °C…+ 70 °C
(- 10 °C…+ 60 °C with oxygen)
Process/Port connection & communication
Port connection NPT ¼, G ¼, Sub-base, compression or vacuum fitting, others on request
Digital (communication) interfaces
Analogue interfaces
CANopen or CAN based büS or PROFIBUS-DP
4…20 mA, 0…20 mA, 0…10 V or 0…5 V
Input impedance > 20 kΩ (Voltage) o.R. < 300 Ω (Current)
Max. Current: 10 mA (Voltage output); max. Load: 600 Ω (Current output)
Environment and installation
Installation position
Ambient temperature
Degree of protection
Accessories
Software-Tool
Horizontal or vertical
- 10 °C…+ 50 °C (higher temperatures on request)
IP65
Bürkert Communicator
Detailed information can be found in chapter “9.1. Bürkert Communicator Software” on page 16
.
1.) Data refers to the typical power consumption (at 23 °C ambient temperature, nominal flow rate and 30 min. control mode). The specifications according to UL 61010 - 1 can differ (see Operating Manual).
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Type 8742
2. Approvals
Note:
• The approvals and conformities listed below must be stated when making enquiries. This is the only way to ensure that the prod uct complies with all required specifications.
• Not all available types can be supplied with the approvals or conformities below.
Approvals Description
UL Listed according to DIN EN 61010-1 for USA and Canada
FDA
Conformity of all materials in contact with the medium
USP Class VI chapter “87 in vitro” and „88 in vivo, Implantation“
Conformity of all materials in contact with the medium
FDA – Code of Federal Regulations Title 21 Paragraph 177 (CFR 21 177.2600)
Conformity of all materials in contact with the medium
Regulation (EC) No. 1935/2004 on materials and objects intended to come into contact with food
ATEX
ATEX/ IECEx:
II 3G Ex nA IIC T* Gc X and
II 3D Ex tc IIIC T***°C Dc X acc. to DIN EN 60079 - 0 and DIN EN 60079 - 15, T3/4 and T160 °C/135 °C depending on device variant
3. Materials
3.1. Chemical Resistance Chart – Bürkert resistApp
Bürkert resistApp – Chemical Resistance Chart
You want to ensure the reliability and durability of the materials in your individual
application case? Verify your combination of media and materials on our website or in our resistApp.
Start Chemical Resistance Check
4. Dimensions
Note:
The following table applies to the following dimensions.
A
G ¼
NPT ¼
G ⅜
NPT ⅜
G ½
NPT ½
G ¾
NPT ¾
11
15
14
16
15
Thread depth [mm]
12
11
12
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Type 8742
4.1. Devices with büS/CANopen interface
MFM or MFC with internal valve (Type 2871)
Note:
Dimensions in mm
2 x M4 6
33
A
28
A: G 1/4 or NPT 1/4 depth 12 mm
84.5
70.2
58
29
0
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Type 8742
MFM or MFC with internal valve (Type 2871), sub-base version
Note:
Dimensions in mm
4 x Ø 4.5
58.5
17.75
14
0
14
17.75
2 x Ø 8.8
2 x Ø 6
92 97
43
28
84.5
70.2
58
29
0
6
MFC with external valve (Type 2873)
Note:
Dimensions in mm
2 x M4 6
32 20
87.3
84.5
70.2
58
29
A
A: G 1/4 or NPT 1/4 depth 12 mm
0
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107
181 approx.
26
6 | 19
Type 8742
MFM for high nominal flow rates
Note:
Dimensions in mm
4 x M4 10
Socket C5
Ø 19.5
MFC with external valve (Type 2873) for high nominal flow rates
Note:
Dimensions in mm
Ø A
48
4 x M4 10
94
79.5
67.5
38.5
34
0
199
approx. 14
C5 with valve Type 2873
94
79.5
67.5
34
0
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Type 8742
MFC with external valve (Type 2875) for high nominal flow rates
Note:
Dimensions in mm
4 x M4 10
218
approx.13
C5 with valve Type 2875
Ø A
48
49
110.8
96.8
94
79.5
67.5
34
0
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Type 8742
4.2. Devices with analog or PROFIBUS-DP interface
MFM or MFC with internal valve (Type 2871)
Note:
Dimensions in mm
2x M4 6
Socket
111
83
49
29
0
16.8
A
28
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Type 8742
MFM or MFC with internal valve (Type 2871), sub-base version
Note:
Dimensions in mm
4x Ø 4.5
58.5
2x Ø 8.8
2x Ø 6
17.75
14
0
14
17.75
111
83
49
29
0
6
16.8
107
2x M4
28
43
Sub-base
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Type 8742
MFC with external valve (Type 2873)
Note:
Dimensions in mm
2x M4 6 with valve Type 2873
120.5
92.5
58.5
38.5
34
0
114.25
111
83
49
29
0
16.8
MFM for high nominal flow rates
Note:
Dimensions in mm
181
approx.
26
4x M4 10
40 48
Socket C5
A
48
A
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Type 8742
MFC with external valve (Type 2873) for high nominal flow rates
Note:
Dimensions in mm
4x M4 10
40 48
120.5
92.5
58.5
38.5
34
0
199
approx. 14
MFC with external valve (Type 2875) for high nominal flow rates
Note:
Dimensions in mm
4 x M4 10
C5 with valve Type 2873
A
48
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218
approx.13
C5 with valve Type 2875
Ø A
48
49
110.8
96.8
94
79.5
67.5
34
0
12 | 19
Type 8742
5. Device/Process connections
5.1. CANopen or CANopen-based büS
M12 lug, 5 pin (A-coded)
5
4
1
3
2
Coding
Pin Configuration
1 Shield
2 24 V
3 DGND
4 CAN_H
5 CAN_L
5.2. Analogue
M12 socket, 5 pin (A-coded)
5
4 1
Coding
3 2
M12 plug, 5 pin (A-coded)
3 2
Coding
4 1
5
Pin Configuration
1 Digital input GND
2 Digital input +
3 Relay, Reference contact
4 Relay, normally closed contact (Break contact)
5 Relay normally open contact (Make contact)
Pin Configuration
1 Set value input GND (not connected for MFM)
2 24 V
3 GND
4 Set value input (not connected for MFM)
5 Analogue output for the measured value
5.3. PROFIBUS-DP
M12 socket, 5 pin (B-coded)
5
3 4
Pin Configuration
1 5 V
2 RxD / TxD (Line A)
3 DGND
4 RxD / TxD (Line B)
5 Not connected
2 1
Coding
M12 plug, 5 pin (A-coded)
3 2
4
Coding
1
5
Pin
1
2
3
4
5
Configuration
Shield
24 V
GND
Not connected
Not connected
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Type 8742
6. Performance specifications
6.1. Pressure Loss Diagram of the MFM
The diagram shows an example of the pressure loss characteristics when air flows through. To determine the pressure loss of another gas, the corresponding air equivalent must first be calculated and the basic fluidics used for the other gas taken into account.
Chip Sensor up to 160 l
N
/min
170.00
160.00
150.00
140.00
130.00
120.00
110.00
100.00
90.00
80.00
70.00
60.00
50.00
40.00
30.00
20.00
10.00
0.00
0
Flange
10 20 30 40 50 60 70 80
G3/4
G1/4
Flange
G1/2
90 100 110 120 130 140 150 160
Q [l
N
/min]
6.2. Flow characteristic
Nominal flow range of typical gases
Note:
• All values refer to 1.013 bara and 0 °C (Index N)
• Other gases and gas mixtures on request
Gas
Argon
Acetylene
Helium
Carbon dioxide
Air
Methane
Propane
Oxygen
Nitrogen
Hydrogen
0.01
0.03
0.01
0.01
0.01
Min. Q
Nom
[l
N
/min]
0.01
0.01
0.01
0.02
0.01
Max. Q
Nom
[l
N
/min]
160
65
1000
80
160
160
44
160
160
1000
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Type 8742
7. Product operation
7.1. Measuring principle
The flow measurement takes place directly in the bypass channel.
A laminar flow element in the main channel generates a small pressure drop, which drives a small part of the total flow through the bypass channel. The sensor is located there and measures the mass flow directly as a temperature difference. The measurement is performed in a specially shaped flow channel, the wall of which contains a Si chip with an etched membrane at one point. A heating resistor and, symmetrically to this, two temperature sensors, one upstream and one downstream, are placed on this membrane.
If the heating resistor is fed with a constant voltage, the differential voltage of the temperature sensors is a measure for the mass flow of the gas flowing over the chip in the flow channel.
8. Product design and assembly
8.1. Product features
Measures to comply with ATEX requirements
Note:
Devices with ATEX conformity meet protection class IP65.
5
4
1
2
3
No. Description
1 Standard requirements for cable glands are fulfilled for versions with external valve.
2 M12 plug achieves protection class IP65 with and without mounted counterpart.
3 Die-cast housing receives IP protection under high mechanical stress.
4 Screws prevent uncoupling of the M12 connection under tension.
5 Impact protection cap prevents damage of the M12 plug and all connected elements if mechanical stress is applied. No particular ATEX sockets are required.
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Type 8742
9. Product accessories
9.1. Bürkert Communicator Software
Note:
To install the software, click here .
Part of Bürkert’s EDIP program (Efficient Device Integration Platform) is the Bürkert Communicator. This software can be run under
MS-Windows and it is available on Bürkert’s website for free. The Bürkert Communicator allows convenient system configuration and parametrisation of all connected field devices. An accessory part, the büS stick serves as the interface between computer and process instruments (see
“10.4. Ordering chart accessories” on page 17 ). It transfers “USB data” to “CAN data”. The Communi
cator allows:
• Diagnosis
• Parametrization
• Registration and storage of process data
• To watch graph of process
• To update firmware of the device connected
• Guided re-calibration
Type 8742 connection with Bürkert Communicator software
The interface to the “Bürkert Communicator” software tool is based on CANopen. The appropriate bus termination is mandatory.
Hence, please activate, for Type 8742 with analogue or PROFIBUS interface, the termination resistor switch on the büS-stick. For
Type 8742 büS / CANopen, this termination resistor should not be activated, in case the device is already integrated in a properly terminated bus network
To connect the MFC / MFM with the “Bürkert Communicator” software tool, you need a büS-stick. The büS-stick sets contain the necessary accessories.
• For Type 8742 büS / CANopen, the connection is made directly via the 5 pin M12 plug (büS-stick Set 1 contains the necessary accessories).
• For Type 8742, with analogue or PROFIBUS, the connection is made via the micro-USB socket on the device (büS-stick Set 2 contains the necessary accessories).
ATTENTION: No external power supply may be connected to the micro-USB socket! The power supply to the unit must be provided
as described in chapter “5. Device/Process connections” on page 13
.
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Type 8742
10. Ordering information
10.1. Bürkert eShop – Easy ordering and quick delivery
Bürkert eShop – Easy ordering and fast delivery
You want to find your desired Bürkert product or spare part quickly and order directly?
Our online shop is available for you 24/7. Sign up and enjoy all the benefits.
Order online now
10.2. Recommendation regarding product selection
Note:
The product questionnaire form at the end of this document contains the relevant fluid specification. Using the experience of
Bürkert engineers already in the design phase provide us with a copy of the request containing the necessary data together with your inquiry or order.
For the proper choice of the actuator orifice within the MFC, not only the required maximum flow rate Q
Nom ues directly before and after the MFC (p
1
, p
2
) at this flow rate Q
Nom
, but also the pressure val -
should be known. In general, these pressures are not the same as the overall inlet and outlet pressures of the whole plant, because usually there are additional flow resistors (tubing, additional shut-off valves, nozzles etc.) present both before and after the controller.
Please use the product questionnaire form at the end of this document to indicate the pressures directly before and after the MFC.
If these are unknown or not accessible to a measurement, estimates are to be made by taking into account the approximate pressure drops over the flow resistors before and after the MFC, respectively, at a flow rate of Q
Nom let pressure p
1 all the specified modes of operation.
. In addition, please quote the maximum in
max. to be encountered. This data is needed to make sure the actuator is able to provide a close-tight function within
-
10.3. Bürkert product filter
Bürkert product filter – Get quickly to the right product
You want to select products comfortably based on your technical requirements?
Use the Bürkert product filter and find suitable articles for your application quickly and easily.
Try out our product filter
10.4. Ordering chart accessories
Note:
• A büS-Stick is required to connect the MFC / MFM with the “Bürkert Communicator” software tool. It is connected via the micro
USB-socket on the device (büS-Stick Set 2 contains the necessary accessories).
• Please note: The interface to our software tool “Bürkert Communicator” is based on CANopen. A corresponding bus termination is mandatory. Therefore please activate the switchable terminating resistor on the büS-stick.
Description
General accessories
Power supply Type 1573 for rail mounting, 100…240 V AC / 24 V DC, 1.25 A, NEC Class 2 (UL 1310)
Power supply Type 1573 for rail mounting, 100…240 V AC / 24 V DC, 1 A, NEC Class 2 (UL 1310)
Power supply Type 1573 for rail mounting, 100…240 V AC / 24 V DC, 2 A, NEC Class 2 (UL 1310)
Power supply Type 1573 for rail mounting, 100…240 V AC / 24 V DC, 4 A
Article no.
772438
772361
772362
772363
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Type 8742
Description büS-Stick Set 1 incl. cable (M12 and Micro-USB), Stick with integrated terminating resitor, power supply and software büS-Stick Set 2 incl. cable (M12 and Micro-USB), Stick with integrated terminating resistor
Configuration memory (Industrial µSim-Card)
Software Bürkert Communicator
Article no.
772426
772551
On request
Download from www.burkert.com
CANopen/büS büS cable extension M12, 0.1 m büS cable extension M12, 0.2 m büS cable extension M12, 0.5 m büS cable extension M12, 1 m büS cable extension M12, 3 m
Connector M12, socket, straight 1.)
Connector M12, plug, straight 1.)
Connector M12, socket, angled 1.)
Connector M12, plug, angled 1.)
CANopen/büS
Y-junction
Y-junction for connecting two separately powered segments of a büS network
Termination resistor 120 Ohm M12 plug
Termination resistor 120 Ohm M12 socket
LabVIEW device driver
EDS-File (CANopen)
772492
772402
772403
772404
772405
772416
772417
772418
772419
772420
772421
772424
772425
On request
Download from www.burkert.com
Analogue
Connection cable M12 plug (A-coded) on open leads, 5 m
Connection cable M12 plug (A-coded) on open leads, 10 m
Connection cable M12 socket (A-coded) on open leads, 5 m
Connection cable M12 socket (A-coded) on open leads, 10 m
PROFIBUS-DP
Connection cable M12 socket (A-coded) on open leads, 5 m
Conection cable M12 socket (A-coded) on open leads, 10 m
GSD-File (PROFIBUS-DP)
566923
571393
560365
563108
560365
563108
Download from www.burkert.com
1.) It is possible that the M12 connectors cannot be used together on the same side of a Y-junction. If that is the case, please use a prefabricated cable which uses typically a thinner connector.
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For up-to-date addresses please visit us at www.burkert.com
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Arab
Emirates
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Hong Kong
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Japan
Korea
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Credits, © and concept: Christian Bürkert GmbH & Co. KG | Photographs: Marc Eggimann Fotografie - 4051 Basel | Scanner GmbH - Werbeagentur Künzelsau -
74653 Künzelsau
Product Enquiry Form
Mass Flow Controller for gases
Product Enquiry Form - Mass Flow Controller For Gases
Thank you for your interest in our products! In order to provide you with optimum advice, please fill out the following form and send it to your Bürkert representative or e-mail address: [email protected]
. All information submitted will of course be kept strictly confidential.
Please fill in the required fields ! *
*Note: The interactive functions of this PDF may be restricted depending on the PDF reader used.
Personal Information
Company
Customer no.
Street
Telephone no.
Delivery
MFC Application MFM Application
Contact person
Department
Postcode / Town
Quantity Required delivery date
Medium data
Type of gas or gas mixture
Medium temperature
Ambient temperature
ºC / ºF
ºC / ºF
Fluidic data
Flow range Q
Nom
Inlet pressure at Q
Nom
2.)
Outlet pressure at Q
Max. inlet pressure
Port connection
Nom
Min. Max. unit
Ref. N 1.) Ref. S 1.) p
1
= p
2
= p
1max
=
barg
barg
barg
3.)
3.)
3.)
Compression fitting Subbase Vacuum fitting
Thread: G (DIN ISO 228/1) NPT (ANSI B1.2)
¼" ⅜" ½" ¾" 1"
Installation
horizontal, valve upright vertical, upward flow
horizontal, valve horizontal vertical, downward flow 4.)
1.) Reference conditions: Ref. N: T=0°C, P=1,013 bar(a); Ref. S: T=20°C, P=1,013 bar(a)
2.) Corresponds to the calibration pressure
3.) Please indicate all pressure values as overpressure to atmospheric pressure [barg] (g = relative pressure)
4.) Possible reduction of the setting range to 1:10 for a vertical downwards flow
Material specifications
Body
Seals
Electrical data
IP protection
Control / Communication
Note:
Please choose one of the following op tions!
Aluminium Stainless steel
FKM EPDM
Industrial Ethernet
PROFINET
Ethernet IP
Modbus TCP
EtherCAT
(RJ45 always standard) Connection
Note:
Please choose one of the following op tions!
Yes (IP65) No (IP20 or better)
Normsignal CANopen/büS
0 … 5 V
0 … 10 V
0 … 20 mA
CANopen
büS
PROFIBUS DP
4 … 20 mA
D Sub socket
Terminal block
M12 socket
Terminal block
D Sub socket
M12 socket
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© Christian Bürkert GmbH & Co. KG, subject to change
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Product Enquiry Form
Mass Flow Controller for gases
Approvals / Conformities
UL
ATEX II Cat. 3 G/D, IECEx
USP Class VI conformity
FDA conformity
EG 1935/2004 conformity
Additional Requirements / Comment
Send form Delete form
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