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.
Sources of Vitamin K. Dark green leafy vegetables are the best sources of vitamin K. These include spinach, kale, romaine lettuce, mustard greens, leeks and collard greens. One cup of raw spinach contains 145 micrograms of vitamin K, while 1 cup of chopped romaine lettuce contains 48 micrograms.