Liquid Loss-in-Weight Feeder

Introduction

The Liquid Loss-in-Weight Feeder is designed for continuous and accurate gravimetric dosing of liquid additives and process fluids in extrusion, compounding, and other continuous production processes.

The system combines precision weighing, controlled liquid delivery, and closed-loop control to provide stable and repeatable liquid feeding for applications requiring accurate formulation and continuous process control.

Overview

The system continuously monitors the weight change of the liquid feeding unit and automatically adjusts the pump output according to the preset feed rate.

Depending on the characteristics of the liquid, the system can be configured with a diaphragm pump or gear pump to provide stable and controlled delivery across different flow rates and viscosities.

A high-precision weighing system combined with closed-loop control continuously corrects the feeding output, helping maintain consistent dosing even when process conditions change.

The system can be integrated with a refill tank, weighing unit, support frame, pump, and control system as a complete modular feeding solution for extrusion and compounding production lines.

Technical Specifications

• Product Type: Liquid loss-in-weight gravimetric feeder
• Feeding Range: Approx. 2–500 L/h
• Control Method: Gravimetric loss-in-weight closed-loop control
• Weighing System: High-precision load cell weighing
• Liquid Delivery: Diaphragm pump or gear pump, selected according to application
• Pump Control: Automatic flow adjustment based on real-time weight feedback
• Refill System: Manual or optional automatic refill configuration
• System Configuration: Refill tank, weighing unit, pump, support frame, and control system
• Control Interface: Touchscreen control system
• Communication: Modbus TCP/IP, Modbus RTU, PROFIBUS DP, PROFINET, Ethernet, and other optional industrial communication protocols
• Installation: Stand-alone installation or integration with continuous processing lines
• Suitable Media: Liquid additives, process oils, plasticizers, coupling agents, and other pumpable process fluids

Note: Actual feeding range and dosing performance depend on liquid density, viscosity, temperature, pump type, piping configuration, and process conditions. Pump and system configuration should be selected according to the specific liquid properties and required flow rate.

Key Features

• Gravimetric Loss-in-Weight Control – Continuously measures liquid weight loss and automatically adjusts feeding output according to the preset flow rate.
• High-Precision Weighing System – High-performance load cells provide stable and sensitive weight measurement for continuous dosing control.
• Multiple Pump Options – Diaphragm pumps or gear pumps can be selected according to liquid viscosity, flow characteristics, and process requirements.
• Closed-Loop Feeding Control – Real-time weight feedback and pump control help maintain stable and repeatable liquid dosing.
• Wide Feeding Range – Suitable for different liquid dosing requirements with configurable pump and weighing system combinations.
• Integrated System Design – Refill tank, weighing unit, pump system, frame, and control components can be integrated into a complete feeding system.
• Modular Construction – Designed for convenient installation, maintenance, cleaning, and component replacement.
• Automatic Refill Integration – Can be configured with an automatic refill system to support continuous production.
• Intelligent Control System – Supports automatic operation, parameter setting, process monitoring, and integration with production control systems.
• Industrial Communication – Optional communication interfaces support integration with extrusion lines and centralized process control systems.

Applications

The Liquid Loss-in-Weight Feeder is suitable for continuous gravimetric dosing of liquids in applications including:

• Plastic compounding and pelletizing
• Engineering plastics modification
• Cable compound production
• Flame-retardant formulation
• Coupling-agent dosing
• Process oil and plasticizer feeding
• Silane dosing
• Liquid additive feeding
• Extrusion production lines
• Multi-component continuous dosing systems

Typical process media may include BDP, white oil, silane, liquid additives, plasticizers, coupling agents, and other pumpable process fluids.

For different liquid properties, the pump type, weighing range, tank design, piping, heating or insulation requirements, and refill method can be customized to provide a complete liquid gravimetric feeding solution.

Interested in This Product?

If you’re interested in this product or have a specific application in mind, feel free to contact us. Share your material, process requirements, production capacity, and application details, and our team will recommend the most suitable configuration and technical solution to meet your production needs.
Our engineering team will recommend the most suitable solution.