Bürkert Liquid Flow Controller (LFC) Type 8719

Type 8719 is a device for liquid flow control in process technology. The measured value provided by the sensor will be compared in the digital control electronics with the predefined set point according to the signal; if a control difference is present, the control value output to the proportional valve will be modified using a PI-control algorithm. In this way, the flow can be maintained at a fixed value or a predefined profile can be followed, regardless of pressure changes or other disturbances in the system. As a control element, a proportional valve working at low friction guarantees the high sensitivity and good control characteristics of the unit.

Seal

FKM, EPDM or FFKM

Base block

Stainless steel 1.4404

Total weight

Approx. 1 200 g

Nominal flow range (QN)

1.5…36 l/h (25…600 ml/min) regarding water

Operating pressure

Max. 10 bar (145 psi) (depending on the nominal diameter of the proportional valve)

Measuring accuracy

± 1.5 % of reading ± 0.5 % FS

Repeatability

± 0.5 % FS

Measuring span

1:10

Response time (t95 %)

< 500 ms

Operating voltage

24 V DC

Power consumption

Max. 7.5 W (10 W with fieldbus variant)

Residual ripple

< 2 %

Voltage tolerance

± 10 %

Calibration medium

Water (conversion to operating medium with correction function)

Medium temperature

- 10 °C…+ 40 °C

HS Code

9026.10

• Burkert 8719
• Buerkert 8719
• Bürkert 8719
• Type 8719
• Burkert Type 8719