I just don't know the specs on them
A lot of the ones I saw that were that style were only rated to 15 psi, I run 26. Another concern for me was the opening pressure(vacuum) and rated temperature. A valve could be rated for oil but is it rated for hot oil vapor while sitting in a hot engine bay? The ones I picked were rated lower than I wanted but they've held up well for over a year now and I made sure to mount them closer to the catch can to keep temps down. Plus the ones linked are also rated for fuels which there is a lot of in blowby.
Even though the bodies are large I went with the 1/2" versions for the 4x flow over the 1/4" versions that you would assume is what you want since the fittings are 1/4" BSPT
Quoting yeti:
Ok sweet thanks I just ordered the part from JNz
Awesome that helps a bunch I thought that would be the best idea but was not sure.
So plan is to route breather and line from PCV placement to catch can inlets and run outlet to check valve going to IM
If I butchered that understanding please let me know 🍻
You will need another outlet (4 total ports on the can) for when under boost or the thing will smoke like a coal train on decel after a pull.
So another valve pointed in the opposite direction either vented to atmo or to your intake pipe.
I don't have a photo but I used an inexpensive Amazon can that has an "inlet" and an "outlet" one the side and then a port on top with a plug that you can take out to run a filter. I put a "Tee" fitting on that top port with the valves connected to it and then off to their respective places. Only one of the branches of the tee will be flowing at any given time so I wasn't worried about choking it. I used both the inlet and outlet as inlets with some coarse steel wool added to the catch can.
I just remembered that they do make fittings that can pull a vacuum based off flow across them, they extend in the tube a little and have a slash cut in them, that people liked to use in speed density setups. Muscle car guys sometimes use an exhaust version of it to just burn everything up and out the tailpipe.
Found it. Should work the same in an intake pipe: