The mass flow controller (MFC) / mass flow meter (MFM) Type 8756 is particularly suitable for the very precise measurement or control of small quantities of liquid that also require a medium-separated sensor. The measuring principle of the sensor is based on the Coriolis effect and is completely independent of the medium. Pressure and temperature deviations have no impact on the measuring accuracy. In addition to the flow rate, the density and temperature of the liquid are measured. The device design enables a stable flow measurement that is robust to external impacts and does not require a zero-point adjustment when the process conditions change. All wetted materials are highly resistant and allow use for a wide range of liquids, whether aggressive or neutral media. Type 8756 is available in the variants MFM, MFC with an interface for a modular actuator, MFC with integrated proportional valve and MFC with integrated micro annular gear pump. The high-precision pump is self-priming and the space in contact with the medium is sealed hermetically. It offers a very large control range and generates extremely low pulsations. This variant is used as a control or dosing system for liquids which have to be conveyed from an unpressurised container.
Features
Type 8756 - Mass Flow Controller / Mass Flow Meter for Liquids Features:
- Flow measurement/flow control up to 120 kg/h
- Very high accuracy and measuring range
- High long-term stability, no zero-point adjustment necessary
- Highly resistant wetted materials
- Suitable for numerous liquids
Specifications
Type 8756 - Mass Flow Controller / Mass Flow Meter for Liquids Specifications:
| Materials | |
| Housing | Aluminium |
| Base block (wetted) | Stainless steel 1.4404/316L (optionally with inspection certificate 3.1 according to EN 10204) |
| Sensor (wetted) | Stainless steel 1.4404/316L (optionally with inspection certificate 3.1 according to EN 10204) |
| Actuator (wetted) | Further information can be found in the table section Actuator (see below). |
| Seal (wetted) | FFKM or PCTFE, metal possible in the modular variant Further information on the sealing materials can be found in the table section Actuator (see below). |
| Total weight | > 2 kg |
| LED display | RGB-LED according to NAMUR NE107 |
| Further actuators In the modular variant, further actuators can be connected. The internal dosing algorithm is capable of dosing with different actuators. | |
| Electrical data | |
| Operating voltage | 24 V DC |
| Power consumption | < 2 W + < 30 W (as MDC with modular actuator) 3 W (as MDC with actuator Type 6724/ 12 W (as MDC with actuator Type 6013/) 8 W (as MDC with actuator Type 6757) |
| Voltage tolerance | ± 10 % |
| Medium data | |
| Calibration medium | Water |
| Medium temperature | 0 °C…+ 50 °C (higher on request) |
| Viscosity (dynamic) | 0.3…350 mPas (higher on request |
| Process/Port connection and communication | |
| Process connection | G ⅛, NPT ⅛, VCR® ⅛, VCR® ¼, double compression fitting ⅛", ¼", 4 mm, 6 mm, tri-clamp |
| Electrical connection | |
| büS/CANopen variant | 1x M12 plug, 5-pin |
| Industrial Ethernet variant | 1x M12 plug, 5-pin, 2x M8 socket, 4-pin |
| Approvals and conformities | |
| Certificate | Material certificate 3.1 (optionally) |
| Environment and installation | |
| Installation position | Any, to prevent the accumulation of gas bubbles in the medium: horizontal upright/horizontal overhead |
| Ambient temperature | 0 °C…+ 50 °C (deviating temperature ranges on request) |
| Storage temperature | - 10 °C…+ 70 °C |
| Relative air humidity | Max. 95 % at + 55 °C, non-condensing |
| Accessories | |
| Software | Bürkert Communicator |
| Performance data | Size 1 | Size 2 |
| Nominal flow rate | ≤ 30 kg/h | ≤ 150 kg/h |
| Dosing characteristics | ||
| Dosing range | 0.05 g…100 g | 0.5 g…1000 g |
| Dosing time | 0.05 s…7 s | 0.05 s…7 s |
| Dosing precision | 0.2 % of reading for dosing quantity ≥ 0.2 g (under calibration conditions and after 1 min warm-up time to achieve the best measuring conditions | 0.2 % of reading for dosing quantity ≥ 5 g (under calibration conditions and after 1 min warm-up time to achieve the best measuring conditions |
| Temperature | ||
| Measuring accuracy | ± 1.0 K with flow > 1.5 kg/h | ± 1.0 K with flow > 5.7 kg/h |
| Repeatability | ± 0.5 K with flow > 1.5 kg/h | ± 0.5 K with flow > 5.7 kg/h |
| Tightness to the outside (helium) | < 10 - 6 mbar*l/s (depending on seal material) | < 10 - 6 mbar*l/s (depending on seal material) |
| Actuator | Size 1 | Size 2 |
| Valve Type 6724 | ||
| Dosing amount | ≥ 50 mg | - |
| Pressure | ≤ 5 bar | - |
| Viscosity (dynamic) | ≤ 40 mPas | - |
| Wetted parts | EPDM, PEEK | - |
| Protection class | IP10 (IP65 on request) | - |
| Valve Type 6013 | ||
| Dosing amount | ≥ 50 mg | ≥ 500 mg |
| Pressure | ≤ 16 bar (higher pressure on request) | |
| Viscosity (dynamic) | ≤ 350 mPas (higher viscosity on request) | |
| Wetted parts | EPDM, stainless steel 1.4305/303, 1.4113/434, 1.4310/301, 1.4303/305L | |
| Protection class | IP65 | |
| Valve Type 6757 | ||
| Dosing amount | - | ≥ 100 mg |
| Pressure | - | ≤ 10 bar |
| Viscosity (dynamic) | - | ≤ 40 mPas |
| Wetted parts | - | FFKM, PEEK |
| Protection class | - | IP30 |
Applications
Type 8756 - Mass Flow Controller / Mass Flow Meter for Liquids Applications:
- Pharmaceuticals & Biotechnology - precision dosing, batch filling, and reagent delivery
- Food & Beverage - small-volume additions in product formulations
- Chemical Process Technology - resistant wetted materials
- Thin-Film Coating & High-Precision Manufacturing - suitable for metering fluids during deposition processes
- OEM Integration & Low-Volume Automation - OEM equipment, lab automation, and small‐volume production
Q & A
Type 8756 - Mass Flow Controller / Mass Flow Meter for Liquids Q & A:
Downloads
Download Bürkert Type 8756 - Mass Flow Controller / Mass Flow Meter for Liquids Datasheet
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