This Expansion Valve Tube Sleeves – Stainless Steel is an Aunov Tech production part in brass or stainless steel, quoted and built to customer print. Once installed, the CNC machined part delivers the precise turned or milled geometry the assembly mounts to. Drawing, cutting and measurement sit on one floor, and a design change is re-sampled in one place without re-quoting the job elsewhere.
Product overview
For this stainless steel tube, the drawing centres on, wall thinning, concentricity and the finished mating faces, controlled from the approved first article onward.
Forming, machining and finishing for this stainless steel tube happen on one site, so the route from print to sample stays short, and the same die can be re-cut from the original data.
From coil to finished part
Every stainless steel tube follows the same routed path: Drawing runs from flat blank to finished envelope in one controlled sequence; piercing and trimming are done in the same die line.
The expansion valve tube manufacturing record is archived together with the drawing revision that produced it. Mill certificates are filed per heat, so expansion valve tube traceability survives a change of material batch.
Materials and finishing
Everything is drawn from a fixed stock list: carbon steel SPCC / DC01, 304 and 316 stainless, aluminium, brass and copper and this stainless steel tube is costed in 304 / 316 stainless steel.
The finish is chosen for the environment the part sees: plating, anodising, powder coating, electrophoresis and passivation. The finish on this stainless steel tube is locked to the drawing revision, so later orders match.
The expansion valve tube manufacturing record is archived together with the drawing revision that produced it. Any change to the expansion valve tube drawing is re-approved and re-verified before production continues.
Quality control
Quality management is certified to ISO 9001: incoming material is verified against mill certificates, the first article is CMM-measured against the print, and run inspections follow an agreed sampling plan. CMM first-article measurement of the expansion valve tube covers diameters and gauges thread class. Torque, leak and pressure tests are available where the assembly needs them, and the inspection report ships with each batch.
Applications
You will find this stainless steel tube inside pump, valve and fluid handling assemblies in volume programmes as well as aftermarket supply.
The same stainless steel tube is used across several platforms, so a single grade and coating can cover each application, and the die does not have to change.
Specifications
| Item | Expansion Valve Tube Sleeves – Stainless Steel |
|---|---|
| Brand | AUNOV |
| Designing | Your drawing sets the part – samples are reverse-measured into a controlled drawing; changes are priced before they are made. |
| Tooling | Tooling is built and held under your part number, so no tooling step is outsourced, and first-article timing is measured from the tooling start date. |
| Samples | Sample parts are measured and reported before submission, so the part is proven before it is made in volume, and production starts only after your written sign-off. |
| Materials | Carbon steel (SPCC / DC01), 304 / 316 stainless, aluminium and brass are held on site; the final grade is fixed with the drawing review. |
| Surface finish | Natural, plated or coated – the print decides, and the agreed finish is logged; the finish is inspected with the dimensional report on the first article. |
| Processing | Drawn-tube process with in-line annealing and finish turning; batch records are filed so a repeat order starts from approved data. |
| Equipment | Drawn-tube benches, in-line annealing and CNC turning; secondary ops run on CNC turning centres, inspection on the CMM. |
| Tolerance | +/-0.03 mm on machined features, +/-0.1 mm on formed ones; finer bands confirmed from capability data before quoting. |
| Delivery terms | Delivery is quoted to your location: FOB, CIF or DDP, by sea or air as you prefer. |
Also known as: stainless steel expansion valve tube manufacturing — same part, same tooling, only the drawing reference differs.
