Difference Between Galvanized and PVC-Coated Wire

Galvanized and PVC-coated wire look similar on a finished gabion but behave differently inside the machine. The important question is not only which wire protects the gabion better — it is what each wire demands from the equipment. This article focuses on the machine side, because that is where buyers get caught out.

Wire Diameter Difference

For galvanized wire the figure is a single diameter, measured directly. For PVC-coated wire there are two numbers: the core wire diameter and the overall diameter after coating. The machine must be set for the overall diameter that passes through the guides and twisting units, so never enter the core diameter as if it were the running size.

Surface Friction

Galvanized wire has a metal surface with predictable friction. PVC-coated wire has a polymer surface that is softer and can be damaged by sharp edges, excessive pressure or rough guides. Feeding and guiding paths must protect the coating as the wire runs.

Feeding Requirement

Coated wire needs a feeding path that avoids sharp bends and pressure points, so the coating is not scraped or pinched. Galvanized wire is more forgiving and typically runs on standard feeding setups. If you plan to run both, confirm the feeding system suits the coated wire.

Tension Requirement

Tension must be set to the wire type. Coated wire needs gentler tension to avoid compressing or cracking the coating, while galvanized wire usually tolerates a wider tension range. Always re-adjust tension when switching between the two.

Twisting Requirement

The twisting area subjects wire to pressure and movement. Coated wire needs twist settings that form the mesh without cutting into the coating. Confirm the twisting units are set for the coated wire so the protective layer survives the process.

Machine Compatibility

A machine that runs galvanized wire may need adjustment to run PVC-coated wire correctly, and vice versa. Before choosing a machine, confirm it can handle the coated outer diameter, that tension is adjustable across the range you need, and that changeover between the two wire types is practical.

Production Changeover

Switching between galvanized and PVC-coated wire is a specification change, not just a material swap. Feeding, tension and twist settings all need to move, then a trial mesh should be run and measured before full production.

Comparison Table

What Information Buyers Should Provide

• Which wire type you use, and whether you will run both
• Core diameter and outer diameter for coated wire
• Mesh size and required working width
• Required production speed and power supply
• Whether changeover between wire types is needed

Storage and Handling of Coated Wire

Wire condition before it reaches the machine affects how it runs. Coils should be stored dry and off the ground to avoid rust on galvanized wire and damage to PVC-coated wire. When moving coils, avoid dragging, which scrapes the coating, and avoid tight straps that pinch it. A damaged coating that goes into the mesh becomes a corrosion point that the coating was meant to prevent. Good storage and careful handling at the coil stage protect the property you paid for on the finished gabion.

Preparing the Machine for Both Wire Types

If your business runs both galvanized and PVC-coated wire, treat the machine setup as the deciding factor. Confirm the feeding path protects the coating, that tension can be set gently for coated wire and firmly for galvanized wire, and that the twisting units are set so the coating survives. Keep a separate setting record for each wire type so changeover is quick and repeatable. Prepared this way, one machine can serve both wire types without the operator guessing each time.

FAQ

Can one machine run both galvanized and PVC-coated wire?
Often yes, but feeding, tension and twist settings must change, and the machine must handle the coated outer diameter. Confirm before ordering.

What is the biggest mistake with coated wire?
Using the core diameter as the running size. The machine must be set for the overall coated diameter.

Does coated wire need different guides?
It needs a feeding path that protects the coating, so sharp edges and pressure points should be avoided.

Why does tension matter more for coated wire?
Excess tension can damage the coating, which becomes a later corrosion point.