Welcome! Here are the website rules, as well as some tips for using this forum.
If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
Can anybody tell me the purpose of a check valve in the main steam supply off of a 175 HP low pressure steam heating boiler? Below is picture. 80 year old government building. Not sure if it was a vacuum system but it is two pipe. Stockholm 12C is model #. Engineer wants it removed. I want to confirm its purpose first.