Corrosion-and-wear bimetallic barrel for PET preform, sheet and rPET applications. Machined in our own Henan workshop — to your drawing, or reverse-engineered from your worn parts.
Virgin PET attacks with acetic-family by-products; rPET adds sand, paper and PVC contamination on top. Our PET-duty bimetallic barrel carries a corrosion-resistant alloy lining that handles both — the standard choice for rPET preform and sheet lines.
Bored and honed to Ø300 with matched screws available. Send the resin (virgin / rPET ratio) and machine model and we quote barrel, screw or set.
Quote within one business day. We reply with a matching proposal, delivery date and price — no generic catalogue PDF.
Standard range shown. Every dimension below can be changed to your machine, resin and output — custom manufacturing is our daily business.
| Bore diameter | Ø20–300 mm |
|---|---|
| Lining | 2–5 mm corrosion-resistant centrifugal alloy |
| Duty | Virgin PET, rPET blends, PET sheet |
| Bore finish | Honed Ra 0.4 |
| Service life | 3–5× nitrided on rPET duty |
| Certificates | MTC with hardness and lining report |
| Lead time | 30–45 days |
The honest answer depends on your resin, not on price. Here is how we advise customers.
| Gas Nitrided (38CrMoAlA) | Bimetallic Alloy Lining | |
|---|---|---|
| Best for | Unfilled PE, PP, PS, ABS, virgin PVC | Glass-filled, mineral-filled, recycled, corrosive |
| Surface hardness | HV 900–1020, depth 0.45–0.7 mm | Alloy layer 2–5 mm, metallurgically bonded |
| Typical service life | Baseline | 3–5× baseline on abrasive resin |
| Cost | Lower | Higher, recovered through fewer stoppages |
| Certification | MTC with heat number | MTC + hardness records, third-party on request |
Not always — nitrided survives virgin duty; rPET is where the corrosion-plus-contamination combination makes bimetallic the economical choice.
If the body is sound, yes — we measure first and quote relining honestly where it is worth it.
Available — for PET we recommend a matched set so clearance and valve wear age together.
Alloy-lined barrel bore for recycled, filled and corrosive materials.
View Details →
Custom flanged barrel for extrusion and injection machines.
View Details →Send your machine model, drawing or worn sample — we reply with a matching proposal and quotation within one business day.
