In printing and coating operations, fluid handling precision defines product quality.
Whether transferring inks, coatings, adhesives, or solvents, every drop must flow smoothly and safely.
Tapflo’s plastic diaphragm pumps deliver the reliability and control that modern printing and coating lines demand, handling everything from viscous resins to flammable thinners without leaks or contamination.
Key Takeaways
- Plastic diaphragm pumps handle inks, varnishes, and solvents safely.
- Corrosion-proof PE and PTFE models resist aggressive coating chemicals.
- Air-driven operation eliminates spark risks in solvent zones.
- Simple, modular design ensures fast cleaning and easy maintenance.
Why Fluid Transfer Matters in Printing and Coating
The printing and surface coating industry uses a wide range of materials inks, pigments, lacquers, adhesives, and solvents.
These fluids vary in viscosity, abrasiveness, and chemical aggressiveness.
Metal pumps can corrode, and seals can fail when exposed to solvents or pigments.
Plastic diaphragm pumps overcome these problems with their non-metallic, air-operated, and seal-less construction, ensuring clean, continuous operation.
How Plastic Diaphragm Pumps Work
These are air-operated double diaphragm (AODD) pumps that use compressed air to move flexible diaphragms alternately.
The pumping action draws fluid in and pushes it out through check valves, providing gentle and uniform flow.
Because there are no rotating seals, they can handle both abrasive inks and volatile solvents safely.
Material Choices for Printing and Coating Fluids
- PE (Polyethene)
- Excellent for abrasive pigment or ink transfer.
- Handles high-viscosity coatings and emulsions.
- Solid-block construction resists mechanical wear.
- PTFE (Polytetrafluoroethylene)
- Ideal for aggressive solvents, varnishes, and cleaning agents.
- Non-stick surface prevents pigment build-up.
- Chemically inert and easy to flush during colour changes.
- Conductive Versions
- Made from conductive PE or PTFE for ATEX safety in solvent-rich zones.
- Prevent static charge build up during high-speed transfer.
Applications in Printing and Coating Lines
- Ink and pigment transfer between storage and press tanks
- Varnish and resin circulation in coating systems
- Solvent and thinner transfer in cleaning systems
- Adhesive and polymer dosing for laminating or coating units
- Colour change cleaning between production runs
Advantages of Plastic Diaphragm Pumps
Operational Benefits
- Leak-free and spark-free operation
- Self-priming up to 5 m dry, 8 m wet
- Handles viscous and shear-sensitive fluids
- Can run dry without damage
Maintenance Benefits
- Quick disassembly and cleaning for colour changes
- Modular parts compatible across sizes
- No lubrication required
- Long diaphragm life reduces maintenance intervals
Integration in Printing and Coating Plants
Tapflo plastic diaphragm pumps can be mounted:
- Beside mixing tanks for ink or varnish circulation
- In colour change systems for easy flushing
- In solvent recovery loops for safe recycling
- On mobile skids for batch or multi-line operations
Compact design and simple air connection make them ideal for both manual and automated setups.
Maintenance and Cleaning Tips
- Flush the pump immediately after each production run.
- Use neutral cleaning solvent or thinner suitable for the ink or coating.
- Inspect diaphragms and valve seats every six months.
- Keep an air filter-regulator fitted to prevent moisture or debris from entering the air valve.
- Always ground conductive versions when handling solvents.
Advantages for Indian Printers and Coaters
- Safer handling of flammable or solvent-based fluids
- Reduced downtime during colour or batch changes
- Long service life even with abrasive inks
- Simple maintenance with minimal spares
Frequently Asked Questions
- Can plastic pumps handle high-viscosity coatings?
Yes, air pressure can be increased for viscous or heavy coatings up to {data needed} cP. - Are they suitable for solvent-based inks?
Yes, conductive PE or PTFE models are certified for safe use in ATEX solvent zones. - Can they be used for continuous recirculation?
Yes, they perform well in continuous-duty systems with clean air supply. - How do I clean the pump between colour changes?
Flush with solvent or thinner until discharge runs clear, then air-dry. - Do they require lubrication?
No, the air valve is self-lubricating and maintenance-free.
Next Steps
Enhance your printing or coating line reliability with Tapflo plastic diaphragm pumps.
They handle pigments, coatings, and solvents efficiently while reducing downtime and contamination risk.
Visit Aftermarket & Service for spare kits, maintenance guides, and selection advice.