There are settings for both gas pressure and flow rate. These can vary depending upon the welding position, metal type/thickness, type of gas used, and conditions (wind, drafts etc.) My welding instructor told us that 20-20 is a good place to start (20 psi, 20cfm flow).
It is the one lettuce that doesn't have a lot of Vitamin K. One cup of iceberg lettuce contains only about 13 micrograms (mcg) of Vitamin K. This is a low amount and should be safe for you to use as part of your diet while on CoumadinÂ® (warfarin). Thanks for writing, Timothy S. Harlan, MD, FACP. Dr. Gourmet.
Dark green leafy vegetables generally contain extremely high levels of vitamin K. A cup of shredded romaine lettuce provides 48.2 mcg; the same amount of chopped broccoli raab yields 89.6 micrograms. A cup of raw spinach contains 144.9 mcg, while a cup of chopped kale yields a whopping 547.4 micrograms.