PTFE tips cover 20, 25, and 27 gauge in 12.7 mm and 25.4 mm lengths. Larger IDs move more fluid with less flow resistance; smaller IDs control finer dots and narrower beads. Start with deposit size to select gauge, then evaluate length based on target zone depth and clearance.
Fluid Reactivity: Choose PTFE-lined dispensing tips when cyanoacrylates, anaerobics, activators, or similar low-viscosity reactive fluids can cure or leave residue inside a standard metal path.
Gauge Size: Start with deposit size. 20 gauge supports higher flow, 25 gauge fits smaller deposits, and 27 gauge is better for fine dots and narrow beads.
Tip Length: Use 12.7 mm for shorter, stiffer outlet control in open-access zones. Use 25.4 mm when recessed geometry blocks direct access to the target area.
Selection Boundary: If the fluid is non-reactive and pressure resistance matters more than anti-stick behavior, stainless steel tips are typically the better choice.
Standard gauge and length configurations cover most reactive adhesive dispensing applications, but specific orifice geometry, outlet behavior, connection interface, or pack format requirements sometimes fall outside the standard range.
Manufacture to your drawing with specified gauge, liner protrusion, cannula length, and hub geometry.
Develop tip geometry based on fluid reactivity, cycle timing, outlet position, and clog-risk profile.
Adjust gauge, length, hub format, or liner extension distance to match existing syringe barrels or valve interfaces.
Add custom labels, hub colors, or pack quantities for product identification and catalog consistency.
PTFE tips fit production lines that run reactive low-viscosity fluids and cannot tolerate frequent outlet curing, residue buildup, or unstable micro-dosing between cycles.
High-density PCB layouts need precise micro-dot placement near solder joints and fine-pitch components. A standard metal outlet can collect residue and start curing at the tip edge, which causes inconsistent dots or mid-run blockage. The PTFE outlet zone reduces this metal-contact failure point and helps maintain more repeatable dot size across short, repeated cycles.
Sensors, connectors, and trim assemblies often require adhesive or sealant application under steady cycle timing. If reactive fluid cures at the outlet during short pauses, cleanup time and line stoppage rise quickly. Solvent exposure can also shorten the life of an unlined wetted path. The PTFE liner reduces outlet curing and helps maintain a usable flow path across longer production runs.
Anaerobic adhesives cure on contact with metal surfaces in low-oxygen conditions, which makes an unlined metal tip prone to blockage during short dispense pauses. The PTFE-lined dispensing tips reduces metal-fluid contact inside the tip, and the extended outlet zone reduces exposure at the exit point. This helps keep the tip usable through shift changeovers with less mid-cycle cleaning and less operator intervention.
Our blog is designed to help you deepen your knowledge of fluid dispensing processes, optimize your production line, and select the best components for your specific challenges. Explore articles that connect industry insights with practical solutions.
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