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.
Leafy Greens. Leafy green vegetables are one of the richest dietary sources of vitamin K. This category includes kale, spinach, collard greens, Swiss chard, mustard greens, turnip greens, spinach and leaf lettuce. These greens contain anywhere from 265 to 531 micrograms of vitamin K per 1/2 cup cooked and 116 to 299 micrograms per cup raw.