As a high-precision and high-efficiency liquid filling equipment, gear pump filling machines are widely used in industries such as food and daily chemicals, especially for the quantitative filling of liquid seasonings like soy sauce. Below is a detailed introduction to its core advantages:
Positive Displacement Principle: The gear pump achieves quantitative delivery through the fixed volume of gear teeth spaces. The volume of liquid discharged per rotation is constant (directly related to the gear module and number of teeth), unaffected by liquid viscosity or pressure fluctuations. Filling errors are typically controlled within ±0.5%~±1%, significantly superior to gravity filling (which relies on liquid level height and has larger errors).
Digital Control Enhancement: Combined with a PLC system, it accurately calculates gear rotation speed and cycles, allowing direct setting of the target value (e.g., "280mL per bottle"). The system automatically matches the number of gear rotations to avoid manual adjustment errors, making it particularly suitable for pre-packaged food production with strict net content requirements (such as the tolerance limits for quantitatively packaged goods in Chinese national standards).
Strong Viscosity Adaptability:
Low-viscosity liquids (e.g., light soy sauce, vinegar): The gear pump encounters low resistance during rotation, enabling rapid suction and discharge to maintain high flow rates.
High-viscosity liquids (e.g., dark soy sauce, oyster sauce): The squeezing force generated by gear meshing overcomes internal liquid friction, avoiding the reduced filling efficiency caused by excessively slow flow rates in traditional gravity filling.
Flexible Adjustment for Bottle Shapes and Capacities:
By replacing gear pumps of different specifications (changing the tooth space volume) or adjusting gear rotation speed, it can easily adapt to packaging bottles of different capacities (50mL~5L).
It offers better filling stability for special-shaped bottles (e.g., square bottles, flat bottles) than piston filling machines (which require precise bottle mouth alignment), only needing to ensure consistent insertion depth of the filling head.
Continuous and Stable Liquid Supply: Unlike piston filling machines that require frequent reciprocating movements, gear pumps achieve continuous liquid output through sustained rotation. Filling speeds can reach 50~300 bottles per minute (depending on pump specifications and the number of heads; for example, an 8-head gear pump filling machine can process over 10,000 bottles per hour).
Low Pulsation and No Dripping: Liquids are sealed within the gear teeth spaces during meshing, avoiding turbulence and foam caused by high-speed impeller rotation in traditional centrifugal pumps. Meanwhile, no residual liquid drips when the outlet valve closes, reducing material waste and keeping the production line clean.
Few and Reliable Core Components: The main moving parts are a pair of meshing gears and a motor, with no complex seals or vulnerable pistons. The average service life can reach 8~10 years, far exceeding piston filling machines (which require regular seal ring replacements).
Modular Design for Easy Maintenance: The gear pump can be independently disassembled for cleaning, and the pipeline system uses quick-installation interfaces. Routine maintenance can be completed without professional technicians, allowing component replacement or disinfection with short downtime (typically <30 minutes per maintenance).
Excellent Wear Resistance: Gears made of 304/316L stainless steel, with polished or hardened surfaces, are resistant to corrosion by acidic liquids like soy sauce and can maintain measurement accuracy after long-term use.
Fully Enclosed Pipeline Design: The entire flow path from the storage tank to the filling head uses enclosed pipelines to prevent direct contact between liquids and air, reducing the risk of microbial contamination. This is particularly suitable for hygiene-sensitive products like low-salt soy sauce.
Easy Cleaning and Disinfection: All liquid-contact components (gears, pipelines, filling heads) support CIP (Clean-in-Place) or SIP (Sterilize-in-Place), and can be quickly disinfected with high-temperature steam or cleaning agents, complying with GB 14881 General Hygienic Practices for Food Production.
High Energy Efficiency: As positive displacement pumps, gear pumps have output flow directly proportional to rotation speed. Speed adjustment via variable-frequency motors enables "on-demand liquid supply," saving approximately 20%~30% energy compared to centrifugal pumps (which require constant rotation speeds).
Low Noise Operation: Smooth gear meshing eliminates the impact noise of piston filling machines, with working environment noise typically <75dB, complying with noise control standards for industrial sites.
