Bürkert Mass Flow Controller (MFC)/mass Flowmeter (MFM) for Gases Type 8744

The Type 8744 mass flow controller (MFC)/mass flow 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 non-wetted sensor elements, is used for this. This also enables easy conversion to the process gas in question. The wetted parts are made of high-quality stainless steel and FFKM as seal material for high chemical resistance. The MFC variant 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 Industrial Ethernet interface. Type 8744 represents the IP65 variant of the Type 8743 and contains the CAN-based büS variant 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.

Seal

FKM, EPDM and FFKM, PCTFE seat seal for nominal diameters DN 0.05 and DN 0.1

Housing

Aluminium die casting (painted)

Base block

Stainless steel 1.4404/316L

Wetted parts

Stainless steel 1.4401/316, 1.4404/316L, 1.4435/316L, PCTFE and seal material

Total weight

Variant for nominal flow rates < 20 l/min: Variant for nominal flow rates > 20 l/min:

LED display

RGB LED according to NAMUR NE107

Nominal flow range (QN)

10 mlN/min…100 lN/min (N2)

Operating pressure

MFM: max. 10 bar

Repeatability

± 0.1 % FS

Turndown ratio

1:20 at QN < 25 ml/min, 1:50 at QN > 25 ml/min (higher on request)

Temperature coefficient

± (0.05 % FS + 0.05 % MV)/K (deviation from gas temperature during calibration and adjust-

Pressure coefficient

± 0.1 % MV/bar (deviation from operating pressure during calibration and adjustment, referring

Settling time (MFC)/Response time (MFM)

< 2 s

Actuator (proportional valve)

Normally closed

Nominal diameter

0.05…4 mm

HS Code

9026.10

• Burkert 8744
• Buerkert 8744
• Bürkert 8744
• Type 8744
• Burkert Type 8744