Black gates engineering S/V atop the Jensen boiler. Please note: this has been adjusted to pop at 28 psi. These incredibly well made SV’s can be adjusted by turning a set screw on top of the SV. I tested it with a manometer on another boiler and using a scrubber adjusted it to pop off at 28. It can be set as low as 15 psi, and as high as 80.
Shout out to Charlie, he had a few of these laying around and gave me a spare. I’d say they’re the best SV’s to date.
https://www.youtube.com/watch?v=mD5ERL-l2mo