The dilemma in choosing hyperbaric oxygen valves.
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I was working on a project recently that required a batch of high-pressure oxygen valves; most of them were of the DN25–50 size, with an actual operating pressure of around 5.8 MPa. The operating temperature was usually at room temperature, though in some cases it reached 280 degrees Celsius. There were nearly a hundred such valves in total. I saw on forums that domestic manufacturers have already achieved good results, but I contacted no less than twenty valve manufacturers, and not a single one was able to do it? One manufacturer did get in touch with us, saying that ordinary stainless steel valves could meet the requirements after degreasing – we were really speechless! ! ! I also got in touch with those imported options; both the valve body and the valve core are made of Inconel 625, but it’s too expensive – it’s simply unaffordable. I heard that high-pressure oxygen valves were used quite frequently in coal chemical processing in the past; I hope experts can offer some advice and recommend some manufacturers. I also studied in detail the standard \"JBT 12955-2016 Technical Requirements for Valves Used with Oxygen\", as well as the document issued by the European Gas Association titled \"IGC Oxygen Pipeline Systems\». For high-pressure oxygen valves of our type, both the internal components and the valve body must be made from exempt materials
Judging from the poster’s description, it seems that the valve needs to be manually closed; I’m not sure whether a ball valve or some other type of valve should be used Is the material Inconel or Monel? Without knowing this, it’s impossible to give advice to the manufacturer.
There are both manual and pneumatic ones. Mainly, globe valves are used for control valves; both globe valves and ball valves can be used for isolation valves. As long as the material meets the usage requirements and ensures safety, either Monel or Inconel is acceptable.
For ball valves, you can contact Shanghai Hongsheng; their oxygen ball valves are quite good. Additionally, Suzhou Antewei performs well in Shell gasification applications. Also, things like Aerospace Changzheng are widely used in space furnaces. You can discuss the specific details with the manufacturer. For cut-off valves with a slightly higher oxygen level, it is not recommended to use globe valves; ball valves with an appropriate diameter are safer choices. For reference.
Domestically, Newwei and Antwei can do it.
You can contact Antway; they were among the first in the country to operate in this field, and they also provide repair services for imported oxygen valves.
Mainly, the valve sizes are relatively small, and the pressure is similar to that in powder coal gasification; if possible, please share the specific operating procedures
If there is sufficient funding, imported options can be considered; imported 3S valves work fine as well. There are fewer manufacturers that produce valves of small diameter. There are also oxygen check valves, and generally a single manufacturer does not produce all types of these valves. I am able to manufacture ball valves and oxygen check valves
Shanghai Hongsheng Special Valve Manufacturing Co., Ltd. 13899995356 Wu Zhiwang