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Measured, not assumed

Sanitary valve surface roughness, measured on the part

Sanitary valve surface roughness is measured here, not estimated. A hygienic line is only as clean as its worst surface. The internal finish of what we make is read on our own Ra instrument and recorded against the order.

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All of our checks
Sanitary valve surface roughness measured on ferrules with an Ra instrument at Joneng
Roughness inspection

Instrument

Ra roughness instrument

Measured on

The product-contact face

What you get

The figure, against your order

The method

How sanitary valve surface roughness is measured

What the check is there to find, what is actually done with the instrument, and what leaves the factory with the goods.

01

What it catches

  • Sanitary valve surface roughness that polishes out coarser on the product-contact face than the specification asks for.
  • Batch-to-batch drift, where the same part leaves smoother one week and rougher the next.
  • Tool marks and scoring left inside a bore where a cloth cannot reach.
02

How it is run

  • The Ra instrument is run against the surface that matters — the inside of the part, not a flat outside face.
  • Finished goods are measured as part of the re-check on at least 10% of the quantity.
  • Polishing and measuring happen in the same building. A part that reads rough goes back to the belt, not into a crate.
03

What you get

  • The figure is recorded against the order, so what you were quoted is what was measured.
  • A roughness report can be supplied with the goods on request.
  • Tell us the Ra figure your line is specified to. We will say whether we can hold it on that part before you order.

Measured against

On the bench

The Ra instrument, photographed

The Ra instrument against finished ferrules on the inspection bench.

Questions about surface finish

Which finishes can you supply?
Tell us the Ra figure your specification calls for and we will say whether we can hold it on that part before you order, rather than after.
Is the finish measured or estimated?
Measured, on our own Ra roughness instrument, and the figure is recorded against the order.
Which surface is measured, the inside or the outside?
The inside — the product-contact face, which is the one a hygienic line is judged on. An outside face is easier to reach and tells you nothing about what the product touches.
What if a part reads rougher than specified?
It goes back to the belt, not into a crate. Polishing and measuring happen in the same building, so a part that reads wrong is re-worked and measured again the same day.
Can I have a roughness report with the goods?
Yes, on request with the order. The figure is recorded against the order in any case, so it can be supplied later as well.
Do you quote a polishing grade or a measured figure?
A measured figure. A polishing recipe describes what was done to a part; only an instrument says what the part came out at, and that is the number recorded against your order.
Get a price

Send the specification, not an introduction

Tell us the size, the connection and what runs through it, and you get a priced quotation instead of a request for more information.

  • Material certificate on every order
  • Every valve pressure tested, not sampled
  • Quoted in your language and your Incoterm

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