Quote Originally Posted by Tycho View Post
In my haste I forgot to mention that there is of course a filter between the check valve and the compressor.

The check valve is a danfoss SCA, they are picton check valves so they have some damping and hopefully won't rattle to pieces
All good, is there a reason for the check valve on liquid injection line, or is it just for safety.
I have never seen one in that application, economiser need one for sure.