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8718 Liquid Flow Controller
Brand: Burkert Fluid Control Systems
Type 8718 is an instrument 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 variations or other changes in the system. As a control element, a proportional valve working at low friction guarantees a high sensitivity and the good control characteristics of the unit.
Mass Flow Communicator software can be used for parameterisation and diagnosis.
Specifications
Accuracy
- ± 0.5 % of Full Scale
- ± 1.5 % of Reading
Ambient Temperature Range
- 0° to 55° C (32° to 131° F)
Applications
- Bio Reactors
- Fuel Cell Technology
- Heat Treatment
- Machine Tools
- Material Coatings
- Packaging Technology
BSP Connection
- G 1/4” Female
- G 1/8” Female
Communication
- DeviceNet Bus
- Digital
- FOUNDATION Fieldbus, CAN Open
- PROFIBUS DP V1
Consumption
- Power Consumption: 10 W with Fieldbus Version
- Power Consumption: 7.5 W
Electrical Connectors
- DeviceNet & CANopen: M12 Plug, 5-Pin
- D-Sub 15-Pin Connector
- PROFIBUS: 5-Pin M12, Socket
Electrical Contacts
- Normally Closed
- Normally Open
Enclosure, Body Material
- Polycarbonate
- Stainless Steel
Environmental Protection
- Typical of Protection: IP40
Flow Rate
- Full Scale Range: 0.015 to 0.6 LPM Water
- Full Scale Range: 0.9 to 36 L/hr
Indication
- LED Indication for Power, Communication (Only in Fieldbus Version), Limit (Only in Analog Version) & Error
Input Impedance
- 20 kiloohms (Voltage)
Input Signal
- 0-10 V
- 0-20 mA
- 0-5 V
- 4-20 mA
Media
- Clean & Low Viscous Liquids
- Water
Mounting Position
- Horizontal
- Vertical
NPT Connection
- 1/4” NPT Female
- 1/8” NPT Female
Operating Pressure
- Maximum
- Typical, Max.
Operating Voltages
- 24 Vdc ± 10 %
Output
- 0-10 V, Actual Value
- 0-20 mA (Actual Value)
- 0-5 V, Actual Value
- 4-20 mA (Actual Value)
- Burden Current Output: 600 ohms, Max.
- Maximum
Process Temperature
- 10° to 40° C (50° to 104° F)
Relay Output
- One Relay Output: 1 A at 25 V, 25 VA
Repeatability
- ± 0.5 % of Full Scale
Response Time
- Settling Time (t95 %): < 500 milliseconds
Seat / Seal Material
- Seal: EPDM
- Seal: FFKM
- Seal: FKM
Sensor Circuit
- Residual Ripple: < 2 %
Sensor, Probe Type
- Differential Pressure
Turndown
- 1:10
Viscosity
- 0.4 to 4 cSt
- Heat treatment
- Machine tools
- Fuel cell technology
- Packaging technology
- Material coating
- Bio reactors