An ink pump is one of the core components of the ink supply system in printing equipment. It is responsible for extracting ink or ink fluid from the main tank and delivering it to the print system, ensuring smooth and stable ink flow during printing.

Functions of the Ink Pump

Continuous Ink Supply for Stable Output

The ink pump, driven by a micro motor, draws ink from the main tank or secondary bottle to the printhead via ink tubes, ensuring a stable and uninterrupted ink flow during printing.

Maintaining System Pressure Balance

In negative pressure ink supply systems, the ink pump regulates the internal pressure to avoid instability that could lead to air bubbles, ink breaks, or nozzle clogging.

Compatible with Various Ink Types

To accommodate different ink types such as UV, solvent-based, water-based, and sublimation inks, ink pumps are typically made with specific materials—such as corrosion-resistant plastics and acid-resistant rubber—to match the viscosity and chemical properties of each liquid.

Structural Features of Ink Pumps

Compact & Lightweight

Small size and strong compatibility make them easy to install in various ink systems.

Low Noise

Driven by high-speed silent motors for minimal vibration and excellent noise control.

High Durability

Made of engineering plastics like PP/PPS and sealed with EPDM rubber, suitable for long-term use with UV and solvent-based inks.

Long Lifespan, Low Maintenance

Good sealing and dry-run protection design ensure long-term, stable operation.

Application Scenarios

Eco-Solvent Printer

Core of the ink supply system, ensures continuous high-precision printing.

UV Flatbed/Roll-to-Roll Printer

Compatible with UV-resistant inks, maintains stable printhead pressure.

Solvent Printer

Corrosion-resistant construction meets the demands of oil-based inks.

Sublimation Printer

Supports water-based inks, providing smooth and gentle ink flow.

Digital Textile Printer

Enables high-speed ink delivery and stable transmission for large-volume output.

Industrial Label Printer

Works with negative pressure control to ensure consistent and stable ink output.

Types of Ink Pumps

Diaphragm Pump

Most common; driven by a motor to generate pressure through a diaphragm—stable flow and compatible.

Peristaltic Pump

Uses silicone tubes to transfer ink without metal contact—ideal for water-based inks but with limited flow.

Pressurizing Pump

Used in cleaning or positive-pressure systems—relies on air pressure for efficient delivery but requires pressure control.

Negative Pressure Pump (Vacuum Pump)

Maintains negative pressure conditions for stable ink supply—a key auxiliary component.

Different pumps match different inks and applications. Selection depends on ink type, viscosity, and system requirements.

Ink Pump Maintenance Tips

1. Clean the ink pump surface every 1–2 weeks to prevent ink crystallization.

2. Regularly check for aging connectors and loose tubing.

3. Use original or compatible ink to avoid corrosion or clogging.

4. Avoid using non-resistant materials in UV ink environments.