Identify the incorrect statement from the options below:

Explanation

Option A is incorrect because safety valves in heat exchangers are not designed to remove non-condensable gases. Instead, safety valves are provided to protect the system from overpressure. The other statements are accurate: liquid metals and Dowtherm are used for high-temperature heating; high-pressure fluids usually flow through tubes in shell and tube exchangers; and loop seals prevent quick draining in vertical condenser sub-coolers.