Rapid Ref : W007499

Kemppi FreshAir Pressure Control Valve Cap
W007499

Name: Kemppi FreshAir Pressure Control Valve Cap
SKU: W007499
Price: 6.51 GBP

£6.51 EX VAT

SSP Suggested Selling Price = £7.66 YOU SAVE £1.15

Beta 90 with FA Pressure Flow Parts FAQs

Spare parts for an air-fed welding helmet used with a pressure flow supplied-air set: how to identify the right part, what wears and how to look after it.

What should I check on the helmet and air set before each use?

The HSE says respiratory protective equipment must be thoroughly inspected before each use, and that records of regular examinations, maintenance and repairs should be kept for reusable equipment. In practice that means looking over the helmet, head cover, seals, hose, belt and connections for damage, wear, cracks or loose fittings, and checking the air flow in the way the maker's manual describes.

If anything is damaged, or the flow check is not passed, do not weld in the helmet until the fault is put right. The user's risk assessment and the maker's instructions set how often more detailed examination is needed.

How do I choose the right filter lens shade?

Shade depends on the welding process, the current used and how bright the arc is. The standard for welding filters sets out recommended shade numbers for each process and current range, and the maker's chart for your helmet is the best reference. Charts usually allow one shade either side of the listed number to suit the job and your eyesight, so go a shade darker if the glare is uncomfortable.

Do not go lighter than the lowest shade the chart or the maker permits, because too light a shade can let harmful radiation reach the eyes. Do not choose a shade just for visibility without checking the chart. If you are unsure for a particular job, check it against your risk assessment or ask your supervisor.

Does the size of a replacement lens matter?

Yes. A lens has to match the opening in the helmet frame, so the width and height must be correct and the type of lens must suit the holder. Measure the old lens, or check the dimensions printed in the manual or on the lens edge, before buying a new one.

A lens that is only roughly the right size can leave gaps, sit loosely or be held badly, which can let light and spatter reach the face. Also check the filter's marking for the shade and, for auto-darkening types, the optical class. Passive filters and auto-darkening filters are marked differently, so check you are buying the right type.

What does the marking on a welding filter lens mean?

A welding filter carries a marking on the lens showing the shade or shade range, the maker's identification, an optical class and the standard it was made to. Older automatic filters carry four classes each graded 1 to 3, where 1 is the best: optical quality, light diffusion, variation in luminous transmittance and angle dependence. That older standard has been withdrawn and replaced by a newer international series, so newer filters may be marked differently.

The marking on the filter itself is the authority. Compare it with the manual for the helmet and use only the types and shades the maker approves for that helmet.

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