Selection of liquid chlorine or chlorine gas valves
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Generally, for our liquid chlorine receiving units and liquid chlorine vaporization systems, specialized HAC alloy bellows stop valves made for chlorine gas are used. During operation, internal leakage has been observed in these valves, and they are also relatively expensive. I would like to ask the experts: can steel-lined PTFE ball valves be used? Their price is acceptable, and their internal leakage is better than that of globe valves?
I just checked the safety regulations for chlorine – there are two instances where the use of stop valves is specified: a stop valve should be installed between the gas cylinder and the reactor, and two stop valves should be placed on the inlet and outlet pipes of the storage tank. These valves need to be checked regularly to ensure they are functioning properly. Is it a regulatory requirement that globe valves be used, with the assumption that their sealing performance is better than that of ball valves?
Our company uses bellows-sealed globe valves for all the chlorine pipelines in its pyridine chlorination plant. For some other materials that require special-type valves, there were serious internal leaks; later on, a batch of V-ball ceramic ball valves was installed, and their performance was good.
It mainly comes down to temperature and pressure, as well as the function of valves; I’m an expert in this area, so feel free to send me a private message
This question isn’t difficult; it’s about determining the temperature, pressure, and the function of the valves
Special stop valves for chlorine, bellows-type stop valves – either of these will work. As for internal leakage, it might be due to poor manufacturing quality; we specialize in producing such special materials and custom valves. If there are any problems, we can learn from each other!*
……We have used quite a number of steel-lined PTFE ball valves in our liquid chlorine and chlorine gas pipelines; the maximum pressure encountered is around 0.8 Mpa, and they perform well.:)
Steel-lined PTFE ball valve: it can be used for a year when the medium temperature is below 80 degrees Celsius. When the temperature is high, the PTFE lining will bubble and age.
As required by standards, special stop valves for chlorine (bellows-type stop valves) are generally used; before guidelines were issued by organizations such as the Chlor-Alkali Association, ball valves were employed in previous processes.
The globe valve required by the standards, as understood from the context, is more likely to be a shut-off valve at the inlet and outlet of the storage tank, capable of being shut off remotely in case of a leak, rather than referring to a globe valve itself.
We specialize in ceramic valves. I’m not sure if you have considered this option; given harsh operating conditions, ceramic materials offer natural resistance to corrosion and wear. We can discuss this in more detail at 13287974125