

Aircoat part 0533404 is a Teflon V-packing used as a high-performance seal in the pump fluid section of compatible sprayers. This PTFE (Teflon) packing creates a durable, chemical-resistant dynamic seal around the piston, preventing fluid bypass and maintaining pressure during operation. It is an essential replacement part when rebuilding the pump on Aircoat 423 models.
| Part Number | 0533404 |
|---|---|
| Part Description | Teflon V-Packing |
| Brand | Aircoat |
| Fits | Aircoat 423 |
| Condition | New |
The Aircoat 0533404 Teflon V-packing is a high-performance sealing element made from PTFE (polytetrafluoroethylene), formed into a V-shaped profile. It is designed to create a tight, self-adjusting seal around the piston in the fluid section of airless sprayer pumps, offering superior chemical resistance and low friction.
Teflon packings provide excellent resistance to solvents, water-based paints, and other corrosive materials. They offer a longer service life than traditional materials and maintain their sealing properties across a wide temperature range. Over time, even Teflon packings can wear and require replacement. Installing new Teflon V-packings during pump service restores proper sealing and extends pump life.
| Creates dynamic piston seal | Prevents fluid from bypassing the piston during the pressure stroke |
|---|---|
| Self-adjusting design | V-shaped profile expands under pressure for tighter seal |
| Chemical resistant | PTFE material withstands solvents, water-based paints, and corrosive fluids |
| Low friction operation | Teflon provides smooth movement with minimal wear |
| Loss of pressure | Sprayer cannot reach or maintain operating pressure |
|---|---|
| Fluid leakage | Paint leaking from pump throat or weep hole |
| During pump rebuild | Always replace packings when the pump is disassembled |
| Visible wear or deformation | Worn edges, cuts, or loss of original shape |
| Excessive piston wear | Worn packings accelerate piston damage |
Aircoat part 0533404 is designed specifically for use with the following sprayer model. Always verify your pump configuration before ordering.
| Brand / Model | Component |
|---|---|
| Aircoat 423 | Teflon V-Packing |
When replacing the Teflon V-packing, these components are often inspected or replaced to ensure a complete fluid section overhaul.
Inspect for scoring or wear; replace if the sealing surface is damaged.
Check threads and sealing surface; replace if worn or damaged.
Inspect for scoring, pitting, or wear that could affect new packings.