Why are steel and cast iron plug valves not suitable for corrosive media?
Date: 2025-12-31Views: 2260
Because the contact area between the valve body and the plug of a plug valve is very large, rotating the plug generates significant torque. In this case, surface corrosion can quickly cause the sealing element to lose its seal, and increase the torque required to operate the plug valve.
Steel and cast iron plug valves used with corrosive media should be coated with phenolic resin or other plastic coatings.
