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8750 Flow Rate Controller & Flow Control System
Brand: Burkert Fluid Control Systems
The flow rate controller, Type 8750, is a system to measure and control gases using the differential pressure principle.
The reliable and robust system consists of an ELEMENT continuous control valve, Type 2301, with the compact process controller Type 8693 and two pressure transmitters, Type 8323. These components are supplied within an assembled system including a special body.
The Bürkert flow rate controller does not need a separate flow meter. The control valve serves as orifice plate. From the pressure difference across the valve and the given density and temperature a nominal flow can be calculated.
Therefore the flow characteristics of the valve are given to the process controller. The volume flow can then be adjusted by changing the stroke of the control valve. So all components of the control loop build an integrated system.
The flow rate controller offers a high repeatability and large measuring range. With the combination of orifice plate and control valve the pressure drop is reduced in comparison to conventional solutions. With the variable orifice of the control valve the measurement range is increased. Low assembly costs and easy commissioning are further advantages of this unique system.
Specifications
Actuator Size
- 70 to 130 mm
Ambient Temperature Range
- 0° to 55° C (32° to 131° F)
BSP Connection
- Pilot Air Ports: G 1/8”
Communication
- DeviceNet Bus
- PROFIBUS DPV1
Electrical Connectors
- Input/Output Signal: Circular Connector M12 x 1, 8-Pin/Bus
- Internal: Circular Connector M8 x 1, 4-Pins
- Power Supply: Circular Connector M12 x 1, 4-Pin
Electrical Contacts
- Normally Closed
- Normally Open
Enclosure, Body Material
- Actuator & Controller: Polyphenylene Sulfide
- Actuator, Controller & Transmitter: Stainless Steel
Environmental Protection
- Protection Class: IP65 According to EN 60529
- Protection Class: IP67 According to EN 60529
Maximum System Pressure
- psi: 0 to 362.6 (kPa: 0 to 2,500, bar: 0 to 25)
Measuring Error
- ≤ 0.5 % of Full Scale
Measuring Range
- psi: 0 to 232.1 (kPa: 0 to 1,600, bar: 0 to 16)
Media
- Carbon Dioxide
- Control Media: Instrument Air According to DIN ISO 8573-1
- Gas
- Nitrogen
Packing Material
- PTFE-V-Seals
Pipe Size
- 0.5” to 3.9” (15 to 100 mm)
Power Supply
- 24 Vdc ± 10 %
Principle of Operation
- Measurement: Piezoresistive
Process Connection Material
- Pilot Air Ports: Stainless Steel
Process Temperature
- 0° to 80° C (32° to 176° F)
Seat / Seal Material
- PTFE
- Stainless Steel
Sensor, Probe Material
- Stainless Steel
Supply Pressure
- psi: 81.22 to 101.5 (kPa: 560 to 700, bar: 5.6 to 7)