Which is more expensive, stainless steel 316L valves or fluorine-lined valves made of ordinary steel?
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The material contains a large amount of saltwater; its temperature ranges from room temperature to -100°C, and the pressure ranges from 0 to 0.3. The properties of this material can be compared to those of seawater. The process pipelines are made of 316L material, and pneumatic cut-off ball valves made of 316L are suitable; carbon steel lined with fluoropolymer is also an option. Could you please tell me which of these two options is cheaper? Thank you in advance for your answer
316L is much more expensive; of course, the key factor here is its suitability, and one shouldn’t consider only the price
316L is much more expensive. The material should be selected based on the reliability of the medium’s operation.
The medium is similar to seawater; the process specifications state that 304 material is not reliable, so 316L pipes are used. Valves with PTFE linings are chosen, as this medium does not corrode polytetrafluoroethylene, and the temperature of the medium will not exceed 110 degrees℃
This temperature is acceptable; PFA can withstand up to 160 degrees.
I would like to ask what the differences are between PFA and PTFE, including their advantages and disadvantages as well as the different applications for each
They use the same type of medium and have similar characteristics; PFA can withstand higher temperatures
It’s best to choose valves based on the material of the pipeline, so as to avoid mistakes. If the pipe diameter is not large, it is recommended to use 316.
It’s best to choose valves based on the material of the pipeline, so as to avoid mistakes. If the pipe diameter is not large, it is recommended to use 316.