Unfortunately, we do not have any bone broth pressure cooker recipes at this time. We would recommend doing a search on Google for bone broth pressure cooker advice.
Our bone broth simmers for 20 to 24 hours :-) We actually do not use pressure cookers because the protein starts to denature at boiling temperatures, meaning the protein starts losing the nutritional benefits.
Low heat is essential in making high quality bone broths. You should check out this awesome recipe from Paleohack: http://blog.paleohacks.com/bone-broth-recipe/#