Why are plastic valves always used for treating exhaust gas with alkaline solutions? They’re not very effective. How about metal valves?
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Why are plastic valves always used for treating exhaust gas with alkaline solutions? They’re not very effective. How about metal valves?
Due to corrosion of the medium, ordinary metals are not resistant to corrosion, and plastics have poor strength; therefore, valves with carbon steel linings or fluoropolymer linings can be used
The medium is corrosive; ordinary metals are not resistant to corrosion. Additionally, alkali solutions may form crystals, which can impair the sealing performance of valves. It is advisable to use valves with carbon steel linings, fluoropolymer linings, or those that are entirely plastic.
Metals are prone to corrosion; plastics just have lower strength
The plastic is completely damaged; even using a reinforcement rod doesn’t help
Metals are prone to corrosion, and fittings lined with rubber or fluoropolymer are more expensive.
Reply to 6#: How is the force application with the F knob on Ruyi Xing?
Alkaline solutions are corrosive to metals; over time, valves made of such materials will start to leak. Alkaline solutions do not corrode plastics, so plastic valves will not experience leakage
Reply to 1# jindin312: We used plastic CPVC valves in the past, but they tended to crystallize and get stuck, and their handles were prone to breaking. Now some of them have been replaced with 316L valves, and the results are fairly good so far; it’s just that the price is too high!
Ceramic valves are resistant to corrosion and require less torque
It’s made of CPVC plastic, but the valve tends to crystallize and get stuck, and the valve handle is prone to breaking