Expansion Valve for Audi A4: Cast Iron
This expansion valve for the Audi A4 is specified around cast iron, which decides how it behaves in service far more than the part name does. We build to a written specification — base material, dimensions, finish and packing — and hold that specification on file so every reorder reproduces the approved piece.
The usual reason a programme changes supplier is not unit price. It is reorders that did not match the approved sample, or a supplier who changed material without saying so. Both are specification problems, and both are preventable.
Specification
| Product | Expansion Valve |
|---|---|
| Vehicle application | Audi A4 |
| Material / finish | Cast Iron |
| Typical use | Mining Sites |
| MOQ | 500 pieces per specification |
| Sampling | 14 working days, 3 days per revision |
| Bulk lead time | 20-30 days after approval |
| Compliance | DOT |
| Packing | 50 pieces per inner box, 200 per carton |
Material options
- Cast Iron — chosen where wear resistance comes first
- Anodised Aluminium — specified where the part sits close to a heat source
- Forged Aluminium — used when the finish has to hold a coating
- Bronze — the cost-effective default for volume programmes
- Kevlar Composite — the cost-effective default for volume programmes
Processes available
- sintering
- assembly line testing
- injection moulding
- anodising
- gravity casting
- electroplating
Fitment notes
Confirm the fitment against the VIN or the frame number before ordering; two model years often share a name and not a part.
Where it is used
The specification above is the one most often ordered for mining sites. Related applications include food delivery, mining sites, roadside assistance, rural transport, night riding.
Quality and packing
- In-line inspection with AQL 1.5 sampling on every lot.
- Dimensional report issued against the approved drawing.
- Carton marking and barcode to your specification.
- Golden sample retained at the factory as the reorder reference.
Questions buyers ask
What happens if a lot fails inspection?
The lot is re-inspected against the golden sample, and replacement pieces ship on the next available booking at our cost.
What is the minimum order quantity?
The standard MOQ is 500 pieces per specification. Mixed sizes inside one shipment are accepted once the total reaches that figure.
What testing is included?
Standard lots ship with dimensional and hardness reports. DOT documentation is issued with the shipment when your market requires it.
How long does sampling take?
Samples leave the factory in 14 working days, and each revision round adds about 3 days once you have seen the first piece.
Send the specification you are working to and we will confirm what we can match, what we would change and why.
