What is a sulfur-resistant gate valve, and what are the differences between it and a regular gate valve?
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What is a sulfur-resistant gate valve, and what are the differences between it and a regular gate valve?
This post discusses the selection of materials for sulfur-resistant valves: http://bbs.hcbbs.com/thread-1070676-1-1.html (Source: Haichuan Chemical Industry Forum)
Some manufacturer information available online is noteworthy for these two points: 2. The sealing surfaces are made of stainless steel and cemented carbide, ensuring a long service life; 3. Flexible graphite gaskets are used, resulting in reliable sealing as well as easy and flexible operation
Main features and applications of sulfur-resistant gate valves: 1. Compact structure and rational design; the valve has good stiffness, a smooth flow path, and a low flow resistance coefficient. 2. The sealing surfaces are made of stainless steel and cemented carbide, ensuring a long service life. 3. Flexible graphite packing is used, resulting in reliable sealing as well as easy and flexible operation. 4. The drive methods include manual, electric, pneumatic, and gear-driven options; the structural types are elastic wedge single-plate, rigid wedge single-plate, and double-plate types. 5. It is widely applicable in the petrochemical industry, thermal power plants, and other facilities, as a switching device for connecting or disconnecting the medium in oil and steam pipelines.
He is probably trying to boost his visibility and increase the company’s popularity
Okay, thank you so much! ! ! ! !
I was wondering, what’s the difference from the regular ones? Is it the appearance that differs, or are it the internal components? You can answer me directly
The appearance should be the same, unless there is a deliberate marking; what really matters are the differences in sealing materials and such
The model of the sulfur-resistant valve is different from that of a regular gate valve; there is a K before the Z.
In 2012, when I put a new sulfur treatment unit into operation, I learned that sulfur-resistant valves rely on a polytetrafluoroethylene coating, which has poor temperature resistance; it is said that they cannot be cleaned using steam. Therefore, the design institute refused to approve the use of such valves in acidic gas pipelines. Acidic gases cannot be purged with steam; it’s somewhat ridiculous. In the end we consulted the manufacturer, and the design institute was right, but we still decided to use steam anyway.
In my opinion, the main difference lies in the materials used; it is necessary to select materials that are resistant to sulfur corrosion