Let’s talk about some real-world cases of valve usage I’ve encountered
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The biggest concern in valve selection is cost; if there are no human factors getting in the way, many leaks can be avoided, and there is no need to frequently rush to replace valves. The first case encountered was: in the raw material processing stage of a chemical plant, the materials were crushed and then mixed with acid to produce a slurry; this process involved wear and corrosion. Similar to how the human body digests food with stomach acid, which has a temperature of around 120 degrees, the fiberglass ball valves used by users need to be replaced two or three times a month – they don’t last long. Later, when they got in touch with me, I chose the most suitable materials and manufacturing process (ceramic valves). Unfortunately, the customer refused to accept them, saying the price was too high. So I suggested using steel-lined PTFE valves that needed to be replaced annually, and the customer was generally satisfied with that solution. The second case is: the material is corroded, worn, and contains crystals, which makes things even more difficult. Previously, the customer tried several solutions but was not satisfied; frequent replacements disrupted continuous production. Eventually, they contacted me. After the customer provided detailed information about the operating conditions of the medium, we opted for a ceramic V-ball valve. A long time has passed since it was installed, and everything is working properly now. 412372706
An expert is just an expert – they deserve praise.
Thank you for the kind words; I have some basic knowledge in areas that I’m familiar with
I have similar experience to share: I encountered a special operating condition where valves had to be replaced every six months. In this case, it was switch valves used for adding magnesium oxide in the desulfurization and denitrification processes; these valves opened and closed once per hour. Due to magnesium oxide crystallization, corrosion, and erosion, the ball valves started leaking after just 3 months. Half-sphere ceramic materials were used, and after several tests, good results were achieved. However, this approach required an additional automatic reflux system to ensure continuous flow within the pipelines, otherwise blockages would occur.
I like the solution provided by the original poster. Sometimes valves may seem like a minor issue, but they indeed cause a lot of harm to ordinary people.
Hydrogenation catalyst temperature: 140°C, flow rate: 570 liters/h. It was originally a gate valve made of N10276 material. Frequently leaks internally. There are suitable valves.
The sealing surface is quite worn out; the metal material can’t withstand it. Have you used ceramic valves before?