8743 BURKERT | Alldatasheet
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Visit product website DATA SHEET Type 7011 Direct-acting 2/2-way plunger valve Type 6724 2/2 or 3/2-way Whisper Valve with media separa- tion Standard | EU | en | 2023-12-15 | 01 Mass flow controller (MFC)/mass flowmeter (MFM) for gases
- Nominal flow range from 0.01 IN/min to 100 IN/min (re. nitrogen) High accuracy in measurement and repeatability Suitable for aggressive gases User-friendly gas conversion Easy device exchange via configuration memory The Type 8743 mass flow controller (MFC)/meter (MFM) is suitable for controlling or measuring aggressive gases, gas mixtures and in the area of application for alternating gases. A thermal capillary sensor, with sensor elements not in contact with medium, is used for this. This also enables easy conversion to the process gas in question. The forms in contact with medium are made of high-quality stainless steel and FFKM as a seal material for high chemical resistance. The MFC version achieves high control accuracy thanks to the use of Bürkert proportional valve technology and the application-appropriate layout of the valve orifice. The MFC can be implemented with low pressure loss as required, due to the diversity of the available valve orifices. These MFCs and MFMs either communicate the set-point and actual values of the flow value via an analogue interface, or other values, as well as the set-point and actual values, that can be selected via software via an Ethernet interface. Type 8744 represents the IP65 variant of the Type 8743 and contains the CAN-based büS version for integration into CAN or büS networks. A wide range of devices can easily and efficiently be integrated into the control level in this way via an Ethernet gateway. The communication data is configured via the Bürkert Communicator software. Product variants described in the data sheet may differ from the product presentation and description. Type description Can be combined with Type 8743 © Christian Bürkert GmbH & Co. KG, Subject to alteration
2 | 21Visit product website Table of contents 1. General technical data 3 Approvals and conformities 2.2. Conformity ... 2.3. Standards .... 2.4. Foods and beverages/Hygiene ... 2.5. Oxygen 3. Materials 5 4. Dimensions 5 MFC/MFM for nominal flow rates < MFC/MFM for nominal flow rates > 4.2. Variant with analogue signal interface and Modbus RTU .... MFC with valve Type 2871 for nominal flow rates < MFC with valve Type 2871 for nominal flow rates > MFC with valve Type 2873 for nominal flow rates > MFM for nominal flow rates < MFM for nominal flow rates > 4.3. Variant with interface for analogue signals and VCR®-compatible port connection ... MFC with valve Type 2871 for nominal flow rates < MFM for nominal flow rates < 5. Device / Process connections 15 5.2. Analogue 5.3. Modbus RTU .... 6. Performance specifications 18 7. Product operation 18 8. Product accessories 19 8.2. Connecting Type 8743 with the Bürkert Communicator software .... 8.3. Configuration management for easy device replacement ... 8.4. Web server for Industrial Ethernet variant .... 9. Ordering information 20 9.2. Recommendation regarding product selection.... 9.3. Bürkert product filter 9.4. Bürkert Product Enquiry Form ... 9.5. Ordering chart accessories ....
3 | 21Visit product website 1. General technical data Product properties Dimensions Further information can be found in chapter “4. Dimensions” on page 5 Materials Seal FKM, EPDM and FFKM, seat seal PCTFE for valve orifices of DN0.05 and DN0.1 Housing PC (polycarbonate) Base block Stainless steel 1.4404/316L Wetted parts MFM/MFC: stainless steel 316/1.4401, 316L /1.4404, 1.4435, PCTFE and seal material Total weight Variant for nominal flow rates < 20 lN/min: Approx. 700 g (MFM, without valve) Approx. 1000 g (MFC with valve Type 2871) Variant for nominal flow rates > 20 lN/min: Approx. 900 g (MFM, without valve) Approx. 1400 g (MFC with valve Type 2871) Approx. 1500 g (MFC with valve Type 2873) Configuration management Further information can be found in chapter “8.3. Configuration management for easy device replacement” on page LED display 1.) RGB LED according to NAMUR NE107 Performance data Nominal flow range (Qnom) 10 mlN/min…100 lN/min (N2) Maximum operating pressure (overpressure to atmospheric pressure) MFM: 10 bar For MFCs, the maximum operating pressure depends on the medium and nominal valve size Measuring accuracy 2.) ± 0.8 % of reading ± 0.3 % FS (under calibration conditions) Repeatability ± 0.1 FS Measuring span 1:20 at Qnom < 25 mlN/min, 1:50 at Qnom > 25 mlN/min (higher on request) Temperature coefficient ± (0.05 % FS + 0.05 % of reading)/K (deviation from gas temperature during calibration and adjustment) Pressure coefficient ± 0.1 % of reading/bar (deviation from operating pressure during calibration and adjustment, referring to N2) Settling time (MFC)/Response time (MFM) (t95 %) < 2 s Control valve (proportional valve) Normally closed Valve orifice 0.05…4 mm KVS value range 0.00006…0.32 m3/h Electrical data Operating voltage 24 V DC Power consumption 3.) 1…3 W (as MFM) Max. 3…19 W (as MFC, depending on type of proportional valve) Residual ripple ± Voltage tolerance ± Electrical connection Analogue variant D-Sub 9 4.) or terminal block, 6-pin Industrial Ethernet variant 2 x RJ45 (switch) 5.) Modbus RTU variant D-Sub 9 Medium data Operating medium Aggressive and neutral, pure gases (others on request) Calibration medium Nitrogen Medium temperature - °C…+ Process/Port connection & communication Analogue interface 4…20 mA, 0…20 mA, 0…10 V or 0…5 V Input impedance > 20 kΩ (voltage) resp. < 300 Ω (current) Maximum current: 10 mA (voltage output) Maximum load: 600 Ω (current output) Digital communication interface EtherCAT®, EtherNet/IP, Modbus RTU, Modbus TCP, PROFINET Port connection NPT ¼, G ¼, compatible with VCR® ¼, compression fitting (others on request) Approvals and conformities Protection class IP20 Foods and Beverages/Hygiene Further information can be found in chapter “2.4. Foods and beverages/Hygiene” on page 4 Oxygen Further information can be found in chapter “2.5. Oxygen” on page 4
4 | 21Visit product website Environment and installation Installation position Horizontal or vertical 6.) Ambient temperature - 10 °C…+ 40 °C (higher temperatures on request) Accessories Software Bürkert Communicator Further information can be found in chapter “8.1. Bürkert Communicator software” on page 19 1.) For a detailed description of LED colours see operating instructions Type 8743 2.) If the operating medium is different from the calibration medium, the actual measurement accuracy might vary from the indicated value. If the operating medium is natural gas, the measurement accuracy depends on the composition of the natural gas, which can vary depending on the origin and season. 3.) Information in relation to the typical power consumption (at + °C ambient temperature, nominal flow and 30 min closed-loop control mode). Information according to UL 61010 may vary (see operating instructions Type 8743 ). 4.) An additional digital input and a relay output are available for the analogue variant with D-Sub 9. 5.) Supply voltage via separate terminal block 6.) Calibrated in horizontal installation position, zero-point adjustment is necessary if another installation position is selected. 2. Approvals and conformities 2.1. General notes
- The approvals and conformities listed below must be stated when making enquiries. This is the only way to ensure that the product complies with all required specifications. Not all available variants can be supplied with the below menti oned approvals or conformities. 2.2. Conformity In accordance with the Declaration of Conformity, the product is compliant with the EU Directives. 2.3. Standards The applied standards which are used to demonstrate compliance with the EU Directives are listed in the EU-Type Examination Certificate and/or the EU Declaration of Conformity. 2.4. Foods and beverages/Hygiene Conformity Description FDA FDA – Code of Federal Regulations (valid for variable code PL02, PL03) All wetted materials are compliant with the Code of Federal Regulations published by the FDA (Food and Drug Administration, USA) according to the manufacturer‘s declaration. USP United States Pharmacopeial Convention (USP) (valid for variable code PL04) All wetted materials are biocompatible according to the manufacturer‘s declaration. EC Regulation 1935/2004 of the European Parliament and of the Council (valid for variable code PL01, PL02) All wetted materials are compliant with EC Regulation 1935/2004/EC according to the manufacturer‘s declaration. 2.5. Oxygen Conformity Description Optional: Suitability for oxygen (valid for the variable code NL02) The products are suitable for use with gaseous oxygen, according to the manufacturer‘s declaration.
5 | 21Visit product website 3. Materials 3.1. 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 4.1. Thread depths of base blocks MFC/MFM for nominal flow rates < 20 lN/min Note: The following table applies to base blocks B0…B4. Thread (A) Thread depth [mm] G ¼ 12 NPT ¼ 12 MFC/MFM for nominal flow rates lN/min Note: The following table applies to base blocks B5…B9. Thread (A) Thread depth [mm] G ¼ 12.5 NPT ¼ 10 G ⅜ 12.5 NPT ⅜ 11 G ½ 15 NPT ½ 14
6 | 21Visit product website 4.2. Variant with analogue signal interface and Modbus RTU MFC with valve Type 2871 for nominal flow rates < 20 lN/min NPT/G ¼ variant Note: Dimensions in mm A 12.5 0 52.9 97.7 R27.6 145 120.4 2 x M4 8.5 10.15 97.15 140.3 170.15
7 | 21Visit product website Sub-base variant Note: Dimensions in mm 30.6 R27.6 120.6 145 175 4x 4.5 2x 8.75 2x 6 91.5 10.15 26.15 114.15 126.65 130.15 140.15 170.15 17.75 17.75 91.65
8 | 21Visit product website MFC with valve Type 2871 for nominal flow rates > 20 lN/min NPT/G ¼ variant Note: Dimensions in mm 104 113.3 129.3 159.8 A 17.25 138.25 155.5 179.25
9 | 21Visit product website Sub-base variant Note: Dimensions in mm 105 114.3 130.3 4x M4 4.4 30.6 2x 20 2x 25.8 216.5 234.5 242.5
10 | 21Visit product website MFC with valve Type 2873 for nominal flow rates > 20 lN/min NPT/G ¼ variant Note: Dimensions in mm 104 114.65 129.3 159.8 A 17.25 138.25 155.5 184.45
11 | 21Visit product website Sub-base variant Note: Dimensions in mm 105 115.65 130.3 30.6 4x M4 4.4 2x 20 2x 25.8 216.5 234.5 242.5
12 | 21Visit product website MFM for nominal flow rates < 20 lN/min Note: Dimensions in mm A 12.5 0 52.95 R27.6 112 120.6 10.15 97.15 107.3
13 | 21Visit product website MFM for nominal flow rates > 20 lN/min Note: Dimensions in mm 104 129.3 111.8 A 17.25 90.25 107.5
14 | 21Visit product website 4.3. Variant with interface for analogue signals and VCR®-compatible port connection MFC with valve Type 2871 for nominal flow rates < 20 lN/min Note: Dimensions in mm Screw connection with metal sealing washer compatible with Swagelok VCR 1/4" 140.3 171.7
15 | 21Visit product website MFM for nominal flow rates < 20 lN/min Note: Dimensions in mm 107.3 138.7 Screw connection with metal sealing washer compatible with Swagelok VCR 1/4" 5. Device / Process connections 5.1. Industrial Ethernet Terminal block, 3-pin Pin Assignment 1 2 3
1 FE (functional earth)
2 DGND
V RJ45 socket Pin Assignment
1 TX +
2 TX -
3 RX +
4 Not used
5 Not used
6 RX -
7 Not used
8 Not used
16 | 21Visit product website 5.2. Analogue D-Sub, 9-pin, plug Pin Assignment
1 Digital input
2 GND
for supply voltage and digital input 3 24 V
4 Relay, normally closed contact
5 Relay, reference contact
6 Set value input +
7 Set value input GND
8 Actual value output +
9 Actual value output GND
Terminal block, 6-pin Pin Assignment 1 24 V
3 Set value input +
4 Set value input GND
5 Actual value output +
6 Actual value output GND
17 | 21Visit product website 5.3. Modbus RTU D-Sub, 9-pin, plug Pin Assignment
1 Not connected
4 Not connected
5 Not connected
6 RS485-Y
7 RS485-Z
8 RS485-B
9 RS485-A
18 | 21Visit product website 6. Performance specifications 6.1. MFM pressure loss diagram The diagram shows an example of the pressure loss characteristics when nitrogen flows through. To determine the pressure loss of other gases, the corresponding air equivalent must first be calculated and the base block used for the other gas taken into account. 0 20 40 60 80 100 120 Δp [mbar] Q [lN/min]G1/4 G1/2 7. Product operation 7.1. Measuring principle Measurement takes place via bypass. A laminar flow element (LFE) in the main channel creates a low pressure drop. A part of the gas flow is thereby directed into a side channel. This partial flow is proportional to the main channel’s flow rate (through the LFE). Two heating resistors are wound around the thin stainless steel tube. At flow rate, heat is transported in flow direction. In this way, a flow value can be inferred via the heat transport. The sensor tube’s wall acts as a thermal barrier and determines measurement dynamics. It is therefore slower than sensors with resistors directly placed in the gas flow. These sensors can also be used to measure many aggressive gases, as all the main parts that come into contact with the medium are made of stainless steel. In addition, with this sensor principle, conversion between different gases is possible.
19 | 21Visit product website 8. Product accessories 8.1. Bürkert Communicator software Note: The corresponding communication software can be downloaded from the website Type 8920 The Bürkert Communicator is the most important software component of the EDIP (Efficient Device Integration Platform). Various features of this universal tool simplify the configuration and parametrisation of devices equipped with a digital CANopen-based interface. With this tool, the user has a complete overview of cyclic process values as well as acyclic diagnostic data. The integrated graphical programming environment enables the creation of decentralised sub-system control functions. The connection to the PC is established with a USB büS interface set. The adapter is available as an accessory (see “9.5. Ordering chart accessories” on page 21 The Bürkert Communicator enables: Configuration, parametrisation and diagnosis of EDIP devices / networks Switching between defined gases Easy and comfortable mapping of cyclic values Graphic display, monitoring and storage of process values Firmware update of the connected EDIP devices Saving and restoring device configurations Zero-point adjustment in case of changed ambient conditions Guided re-calibration routine
20 | 21Visit product website 8.2. Connecting Type 8743 with the Bürkert Communicator software The Bürkert Communicator interface is based on CANopen. The appropriate bus termination is mandatory. Activate the termination resistor switch on the büS stick. Connection is established via the device’s micro USB socket (USB büS interface set 2 contains the required accessories). Please note: no external power supply may be connected to the micro USB socket. The device must be provided with power as described in chapter “5. Device / Process connections” on page 15 8.3. Configuration management for easy device replacement If a device needs to be replaced, the memory card can be removed from the defective device and inserted into the new one. This transfers all data of the device to be replaced to the new device. The memory card is available as an accessory and must be ordered separately (see “9.5. Ordering chart accessories” on page 21) In order to successfully exchange the device, it is necessary that both the new device and the device to be replaced possess the same device ID. 8.4. Web server for Industrial Ethernet variant All Industrial Ethernet-based devices (except for the EtherCAT® protocol) from software version A.13.00.00 dispose of an integrated web 9. Ordering information 9.1. Bürkert eShop Bürkert eShop – Easy ordering and quick 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 9.2. Recommendation regarding product selection Note: Use the Product Enquiry Form (see “9.4. Bürkert Product Enquiry Form” on page 21 ) for the device details and send it to us once completed. For the proper choice of the actuator orifice within the MFC, you need to know not only the required maximum flow rate Qnom, but also the pressure values directly before and after the MFC (p1, p2) at Qnom. In general, these pressures are not the same as the overall inlet and outlet pressures of the whole plant, because usually, additional flow resistors (tubing, additional shut-off valves, nozzles etc.) are present both before and after the MFC. Please use the Product Enquiry Form to indicate the pressures directly before and after the MFC. If these are unknown or not accessible to measurement, estimates are to be made by taking into account the approximate pressure drops over the flow resistors before and after the MFC, at Qnom.flow rate. In addition, please quote the maximum inlet pressure p1 max to be encountered. This data is needed to make sure the actuator is able to provide a close-tight function within all the specified modes of operation.
21 | 21Visit product website 9.3. 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 9.4. Bürkert Product Enquiry Form Bürkert Product Enquiry Form – Your enquiry quickly and compactly Would you like to make a specific product enquiry based on your technical requirements? Use our Product Enquiry Form for this purpose. There you will find all the relevant information for your Bürkert contact. This will enable us to provide you with the best possible advice. Fill out the form now 9.5. Ordering chart accessories Description Article no. General accessories USB büS interface set 2 (Type 8923) for connection to the Bürkert Communicator software: including büS stick, connection cable to M12 plug, M12 connection cable on micro USB for the büS service interface and Y-distribu- tor, cable length: 0.7 m 772551 Power supply unit Phoenix Class2 (Type 1573), 85…240 V AC/24 V DC, 1.25 A, NEC Class 2 (UL 1310) 772438 Power supply unit for standard rail (Type 1573), 100…240 V AC/24 V DC, 1 A, NEC Class 2 (UL 1310) 772361 Power supply unit for standard rail (Type 1573), 100…240 V AC/24 V DC, 2 A, NEC Class 2 (UL 1310) 772362 Power supply unit for standard rail (Type 1573), 100…240 V AC/24 V DC, 4 A 772363 Memory card On request Device description files for software interfaces Download from www.burkert.com Bürkert Communicator software Download from www.burkert.com For Type
8743 Analogue
Terminal block 6-pin (standard for Type 8743, included in delivery of the corresponding analogue variant) On request D-sub adapter cable, on strand, cable length: 5 m 580882 D-sub adapter cable, on strand, cable length: 10 m 580883