【Piping Valve Technical Edition – Daily Question on Common Piping Errors】20170819
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Discussion on Common Piping Errors 034: Which of the following designs (for the piping of steam traps) is correct? A. B. Answer: B. Generally, bypass valves are not provided on steam traps (as this can lead to an increase in back pressure). A drain valve should be installed before the steam trap inlet, and an inspection valve should be placed behind it. If the steam trap does not have a check function, a check valve must be added when connecting to the condensate piping network.
B is correct. Thermostatic valves generally do not have bypasses.