Corrosion-resistant alloy surfacing on the inner wall of the ball valve
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Forged soft-sealed ball valves, with the inner wall of the valve body clad/sprayed with INCONEL or 316L – which companies offer such products?
How to surface weld the inner wall of the valve body? The sealing surface is fine. For a valve like yours, simply use the material you need during the forging of the valve body
Yes, it’s a very common technique abroad
Yes, it is to save on material costs
For such valves, they are generally forged as a single unit; some also have inner walls that are welded on. I’m not entirely sure about that
It’s probably a medium with high corrosivity; it’s recommended to use a material that can withstand such conditions. If cost savings are essential, then the interior of the valve body and the ball itself should be coated with INCONEL. For soft-sealing valves, it’s necessary that the medium does not contain any hard particles, so corrosion is not acceptable either. In cases of mild corrosion, it might be feasible to use such materials, but for critical applications, it’s better to use materials suitable for those conditions or to install filters, though this will increase flow resistance
Most things can be done with 316L; duplex steel is also an option； If the inner wall of the valve body is to be spray-welded, it can be somewhat troublesome. Some ball valves are fitted with STL cladding or lined with certain materials, but this is done in situations involving high temperatures, high pressures, or corrosive environments. Doing it in this way is indeed complicated. It’s quite common abroad; I’ve come across companies in China that do this kind of work. I can provide such solutions – the price is a bit higher, but the quality is good. Alternatively, you can describe your specific requirements, and by pooling our ideas, we’ll surely find a suitable ball valve for your needs. We can discuss it in detail.
Yes, it is a corrosive medium.
This has become quite common now, with specialized welding cooperation units available.