Me - I want to control system pressure.
Tech Rep - our PSV does that!
Me - No. I want a steady state, continuous system pressure.
Tech Rep - our PSV does that!
Me - No. Your PSV is a basic safety valve. Not intended for continuous pressure control. Besides, the resulting system pressure will have a saw-tooth pattern.
Tech Rep - Nuh uh!
Me - Here, let's go out to an identical valve y'all installed a few years ago so I can show you.
Tech Rep - No. Look at my drawing!
Me - ...It's a safety valve. Even your spec sheet says so.
Tech Rep - ...
:brick: