Liquid Feed Flow Controller

The Liquid Feed Flow Controller is an automatic flow-measurement and pump-control solution designed for liquid feeding systems in commercial pig farms. It monitors the actual flow of liquid feed or process water in the distribution pipeline and can work with a frequency converter to regulate feed-pump speed.

In a typical system, an electromagnetic flow meter is installed downstream of the feed pump. The measuring device determines the outgoing liquid flow independently of fluctuations in the mixing-tank weighing signal, providing an additional reference for accurate feed distribution.

When combined with variable-frequency pump control, the system can maintain a more stable flow rate even when pipeline pressure changes between nearby and distant feeding valves. This supports uniform discharge, improved dosing accuracy and lower mechanical stress on pumps, pipelines and valve components.

The controller is suitable for new pig farm construction, liquid feed kitchen upgrades and integrated livestock equipment projects using conventional, ring-line or residue-free liquid feeding concepts.

• Independent Flow Measurement: Measures outgoing liquid feed or water directly in the pipeline rather than relying only on mixing-tank scale values.
• Variable Flow Regulation: Compatible feeding software and a frequency converter can continuously adjust pump speed to maintain the required pipeline flow.
• Improved Dosing Accuracy: Stable flow conditions help provide more consistent discharge quantities at individual feed valves.
• Pressure Compensation: Pump speed can be adjusted when hydraulic resistance changes with pipe length, elevation and feeding-valve position.
• Reduced Splashing: Controlled, pressure-reduced discharge can help limit splashing when liquid feed enters the trough.
• Lower Feed Losses: More controlled delivery helps reduce over-dosing and unnecessary feed spillage.
• Process Water Management: Flow measurement can support more accurate management of rinse or transport water in residue-free feeding systems.
• Reduced Mechanical Wear: The pump does not need to operate permanently at maximum speed when lower output is sufficient.
• Energy-Efficient Operation: Variable-speed pump control can reduce unnecessary motor power consumption under partial-load conditions.
• Automation Integration: Can be connected with feed pumps, valves, flow meters, PLCs and liquid feeding computers according to project requirements.

• Electromagnetic Flow Meter: Measures volumetric flow of electrically conductive liquid feed or water directly in the pipeline.
• Flow Transmitter: Processes the measuring signal and transmits flow data to the feeding controller.
• Frequency Converter: Adjusts feed-pump motor speed according to the required flow setpoint.
• Liquid Feeding Controller: Compares measured flow with the programmed target and manages the control sequence.
• Feed Pump: Transfers liquid feed through the distribution pipeline at the commanded speed.
• Pipeline Connections: Flanged, sanitary or project-specific fittings connect the measuring section to the liquid feeding line.
• Control Cabinet: Houses the frequency converter, electrical protection and communication equipment where required.
• Optional Pressure Monitoring: Pressure transmitters can be added for additional hydraulic supervision and equipment protection.

Liquid feed leaves the mixing tank through the feed pump and passes through an electromagnetic flow-measuring section installed in the delivery pipeline.

The electromagnetic meter measures the flow velocity of the electrically conductive liquid without mechanical moving parts. The measured value is converted into a flow signal and transmitted to the liquid feeding controller.

The controller compares the actual flow with the programmed target. If the measured flow is too high or too low, it sends a control signal to the frequency converter, which changes the rotational speed of the feed pump.

This closed-loop regulation helps maintain a consistent flow through the distribution line even when pressure conditions vary as different feed valves open or close.

In residue-free systems, direct flow measurement can also help determine the actual quantity of transport or rinse water moving through the circuit without depending exclusively on scale readings from the mixing tank.

• Commercial pig liquid feeding systems
• Sow and gestation feeding systems
• Farrowing-house liquid feeding
• Piglet nursery feeding systems
• Growing and finishing pig farms
• Central liquid feed kitchens
• Multi-barn liquid feed distribution systems
• Residue-free liquid feeding systems
• Ring-line and branch-line distribution
• Feed and rinse-water flow measurement
• New pig farm construction projects
• Existing liquid feeding system modernization
• Integrated livestock equipment and steel structure farm projects

• Flow meter diameter
• Measurement range
• Pipeline connection type
• Stainless steel or project-specific wetted materials
• Frequency converter capacity
• Feed pump motor interface
• Target flow-rate programming
• Pressure sensor integration
• PLC and liquid feeding computer connection
• Local display or remote monitoring
• Alarm and dry-running protection
• Control cabinet configuration
• OEM configuration available upon request
• Designed according to local climate and farm conditions

Flowmeter Position: Install the measuring device in the liquid feed delivery line after the pump at a location that allows stable, completely filled pipe conditions.

Pipe Alignment: The flow meter should be installed without excessive mechanical stress from the connected piping. Suitable supports should be provided where required.

Electrical Connection: Connect the flow transmitter, frequency converter and feeding controller according to the project electrical diagram and local electrical standards.

Parameter Setup: Configure pipe diameter, flow range, target flow rate and control limits before automatic operation.

Commissioning: Verify meter direction, zero condition, actual flow response, pump-speed adjustment and valve discharge behavior throughout the feeding circuit.

Cleaning: The measuring tube should be incorporated into the regular liquid feeding system rinsing and hygiene program to prevent material buildup.

Routine Maintenance: Inspect electrical connections, measuring electrodes, pipe seals, frequency converter and pump operating condition. Recheck calibration or flow performance if system piping or pump configuration is modified.

In a commercial finishing farm, the controller can maintain a consistent liquid-feed flow as distribution moves between valves positioned at different distances from the feed kitchen. The frequency converter adjusts pump speed according to the measured flow instead of operating the pump continuously at maximum output.

For residue-free liquid feeding, electromagnetic flow measurement can be used to determine outgoing feed or water independently of movement-related variations in the mixing-tank weighing signal. This helps improve control of transport water and feed-column movement. :contentReference[oaicite:1]{index=1}

Final system sizing should consider pump capacity, pipe diameter, feeding distance, number of valves, liquid-feed consistency, required dosing accuracy and the hydraulic resistance of the complete distribution network.

Q: What is a liquid feed flow controller?

A: It is a control system that monitors actual liquid flow in the feeding pipeline and can adjust feed-pump speed to maintain the required flow rate.

Q: Why use electromagnetic flow measurement?

A: Electromagnetic meters have no mechanical measuring elements in the flow path and are suitable for measuring electrically conductive liquids such as many liquid-feed mixtures and process water.

Q: Is the measurement independent of the mixing-tank scale?

A: Yes. In the reference system, outgoing feed or water is measured downstream of the pump independently of the tank scale value. :contentReference[oaicite:2]{index=2}

Q: Can the controller automatically adjust pump speed?

A: Yes. Compatible feeding software can work with a frequency converter to regulate the pump continuously and maintain the target flow. :contentReference[oaicite:3]{index=3}

Q: Does variable flow control help reduce splashing?

A: Yes. Lower and more controlled dispensing pressure can reduce splashing at the trough and help limit feed losses. :contentReference[oaicite:4]{index=4}

Q: Can it be added to an existing liquid feeding system?

A: Retrofit installation is possible when the existing pump, motor, pipeline, controller and electrical system are compatible with the required flow meter and variable-frequency control.

Q: Can the system measure rinse water as well as feed?

A: Yes. The reference flow-measuring concept can measure outgoing feed or water and is particularly useful in residue-free liquid feeding systems. :contentReference[oaicite:5]{index=5}

Q: What information is required for a quotation?

A: Please provide required flow rate, pipeline diameter, feed-pump capacity, motor power, liquid-feed characteristics, maximum feeding distance, valve quantity, electrical supply and existing controller information.