Burkert MFC 8626 Gas Mass Flow Controller

The Burkert MFC 8626 mass flow controller is equipped with a 287x series Burkert proportional valve as the actuator, and can be matched with Burkert 3280 or 3285 series electric valves depending on the requirements.

However, Burkert has reliably informed us that the Burkert 8626 mass flow controller will be discontinued soon.

Orders are still being placed, but Burkert is expected to officially discontinue it globally by the end of 2021 or early 2022. The replacement models for the Burkert 8626 mass flow controller are the 8745 and 8746 models.

Today, LEHIY Industrial, as a responsible company, feels it is its duty to inform users who are currently using or will be selecting the Burkert 8626 mass flow controller, especially those in the biopharmaceutical industry, that they must be prepared for the possibility of discontinuation.

First, check if you have submitted a stockpiling plan for your equipment to prepare for unforeseen circumstances. If production stops, the replacement models 8745 and 8746 might not be a perfect substitute. What if there are installation size or functional differences that prevent installation?

Second, before the Burkert 8626 controller is discontinued, you can compare the parameters of replacement models to find a suitable alternative for your equipment. Alternatively, consult our authorized LEHIY Industrial Burkert distributors to obtain the best replacement model from Burkert's technical support.

I want to emphasize that many intermediaries and equipment suppliers who purchase on your behalf won't bother to inform you about this Burkert news.

Therefore, I'm issuing this notice today regarding the impending discontinuation of the German Burkert MFC 8626 gas mass flow controller, to be replaced by the Burkert 8745 and 8746 models.

I hope you will see this and respond promptly with action and decision-making. Examples of Burkert 8745 model replacing Burkert 8626 model gas mass flow controllers:

• The Burkert 8626 mass flow controller (00246754, 500 L/min) is replaced by the Burkert 8745 gas mass flow meter (00361104, 500 N/min) and description of the Burkert 8626 mass flow controller (MFC): The German Burkert 8626 mass flow controller (MFC) is suitable for mass flow control of large volumes of gas. The inline thermal sensor, located directly in the airflow, achieves a very fast response time. A direct-acting Bürkert proportional valve serves as the actuator, ensuring excellent response sensitivity. An integrated PI controller gives the MFC superior control characteristics. The 8626 Burkert gas mass flow controller can be calibrated for two different gases, with users able to switch between them. As an electrical interface, it provides both analog standard signals and fieldbus. Due to its resistance to contamination and high IP protection rating, the 8626 Burkert mass flow controller is particularly suitable for applications in harsh environments. German Burkert mass flow controllers have a wide range of applications, including burner control, heat treatment, metallurgy, food industry, environmental technology, material coating, fuel cell technology, and testing facilities. Nominal flow range from 20 lN/min to a maximum of 1500 lN/min. High measurement accuracy and repeatability. Fast control speed. IP65 protection rating. Optional: Fieldbus interface. Type 8745 - Burkert Gas Flow Controller (MFC)/Flow Meter (MFM) Description: The German Burkert 8745 mass flow controller/mass flow meter is suitable for mass flow control of large volumes of gases. The 8745 can be configured as either an MFM or MFC as needed. Four different gases can be calibrated. The inline thermal sensor located directly in the gas flow achieves a very fast response. A direct-acting speed. Burkert proportional valve as the actuator ensures good response sensitivity. An integrated PI controller gives the MFC superior control characteristics. The Burkert 8745 gas mass flow controller is available as an MFC in two specifications: with a Burkert solenoid proportional valve and with a Burkert electric proportional valve. Nominal flow rate range from 20 lN/min to a maximum of 2500 lN/min. High measurement accuracy and repeatability. Communication via standard signals or industrial Ethernet. Electromagnetic and electric valve actuators are available. Easy device replacement via configuration memory. Burkert Gas Mass Flow Controller MFC 8626 replacement model 8745. Technical Specifications:
• Burkert Gas Mass Flow Controller 8745 General Technical Specifications. Product Features: Material: Body: Aluminum or stainless steel;
• Housing: PC (polycarbonate);
• Sealing Gasket: FKM or EPDM (depending on gas). 1.) Dimensions: For detailed information, please refer to section “4. Dimensions” on page
• Configuration Memory (included in the supply): EEPROM (µSIM card: data related to büS and information dedicated to the regulation loop for easy device replacement) Electrical Parameters Operating Voltage: 24 V DC Voltage Tolerance: ±10% Slope Rate: ±2% Electrical Interface (optional): Industrial Ethernet: PROFINET, Ethernet/IP, EtherCAT, Modbus-TCP via 2 RJ45 (Switch) 2.) Analog: 4…20 mA, 0…20 mA, 0…10 V or 0…5 V via D-Sub 9 3.) or 6-pin terminal Input Impedance: >20 kΩ (voltage) or <300 Ω (current) Maximum Current: 10 mA (voltage output);
• Maximum Load: 600 Ω (current output) Media Parameters Operating Medium: Neutral, uncontaminated gas;
• Other media can be used upon request. Calibration Medium: Correction-enabled operating gas or air. Medium Temperature: -10 °C to +70 °C (under oxygen, -10 °C) 4.) (Up to +60 °C) Product connection pipe interface G or NPT ¼", ⅜", ½", ¾", 1" flange Ambient and installation ambient temperature -10 °C to +50 °C (higher temperatures can be applied upon request) Installation position horizontal or vertical Accessories Software Bürkert Communicator software 1.) Additionally, when using engine valves: - 3280 type DN4: sealing ring made of PEEK (polyether ether ketone) - 3285 type: sealing ring made of Al2O3 2.) Powered by a separate terminal. 3.) In the D-Sub 9 analog specification, additional digital inputs and relay outputs are provided. 4.) When using engine valves, the minimum medium temperature is 0 °C.
• Burkert Gas Mass Flow Controller Model 8745 Product Variables 2.1. Electromagnetic Specifications The Burkert Gas Mass Flow Controller Model 8745 can be configured as MFC or MFM as required. In MFC The specifications use direct-acting 287x series Burkert proportional valves. These Burkert solenoid proportional valves have no-current shut-off, representing the highest measurement accuracy and repeatability in hundreds of microseconds of settling/response time. For detailed product features and dimensions, please refer to section “4.1. Solenoid Specifications” on page
• Total weight approx. 1.8 kg (A1, 16 W valve) approx. 3.1 kg (VA, 16 W valve) Protection rating IP20 LED display RGB-LED, according to NAMUR NE107 Electrical parameters Power consumption 1.) Up to 4 W (as MFM) Up to 12.5 to 31.5 W (as MFC, depending on proportional valve model) Power parameters Rated flow range (Q rated) 20…1500 lN/min (N2) MFM to 2500 lN/min (N2) 8745 Burkert Gas Mass Flow Controller Visit product page 4 4 | 22 Adjustable ratio 1:50 2.) Maximum operating pressure (pressure above atmospheric pressure): 10 bar (for MFC, maximum operating pressure depends on the medium and valve rated width), optional up to 25 bar, suitable for MFM. Measurement accuracy: ±1.5% vM ±0.3% v. E. (after a 15 min heating time). Repeatability: ±0.1% v. E. Settling time (MFC) / Response time (MFM) (t95%) <500 ms. Actuator (proportional valve): No current shut-off. Nominal valve diameter: 0.8…12 mm. KVS value: 0.02…2.5 m³/h. 1.) Measurement range is 10:1 in a vertical installation position with top-down flow. 2.) These information are based on typical power consumption (at 23 °C ambient temperature, rated flow rate, and 30 min regulation mode). Information may differ according to UL 61010-1 (see instruction manual). 2.2. The Burkert 8745 Electric Gas Mass Flow Controller with Burkert Electric Proportional Valve is particularly suitable for applications with high input pressures up to 22 bar or high flow rates (under low pressure loss). Due to its extremely low holding power, these German Burkert valves can significantly reduce equipment energy consumption. The Burkert electric valve holds in its position without flow. The maximum on-time of the motor depends on the ambient temperature. On-time refers to the motor's on-time, not the equipment's on-time. The motor is only activated when the Burkert valve should be moved. on-time can increase dramatically due to frequent changes in ratings. For detailed product features and dimensions, please refer to section "4.2. Electric Specifications" on page
• Total weight approx. 1.67 kg (A1, standard, valve model 3280) Approx. 2.94 kg (VA, standard, valve model 3280) Protection rating IP20 LED display 1.) On MFM: RGB-LED, according to NAMUR NE107 On the valve: RGB LED lights used to indicate valve opening Electrical parameters Power consumption 2.) Maximum 4 W (as MFM), maximum 12 W (as MFC) 2.) Power parameters Rated flow range (Q rated) 20…2500 lN/min (N2) Adjustable ratio 1:50 3.) Maximum working pressure (pressure above atmospheric pressure) 22 bar (for MFC, the maximum working pressure depends on the rated width of the Burkert valve) Measurement accuracy ±2% v. M. ±0.5% v. E. (after a 15 min heating time) Repeatability ±0.5% v. E. Settling time (MFC) / Response time (MFM) (t95%) <5 s Actuator (proportional valve) Maintain no current Valve nominal diameter: 2…20 mm KVS value: 0.5…7.8 m3/h 1.) Accurate LED color description: See instruction manual. 2.) Instructions during engine valve movement. Burkert valve holding power <1 W. 3.) In the vertical mounting position with top-down flow, the measurement range is at most 10:1.

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