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.
Other Green Leafy Vegetables High in Vitamin K (%DV per cup, cooked): Frozen Kale (1433%), Frozen Spinach (1284%), Mustard Greens (1037%), Spinach (1111%), Collards (966%), Beet Greens (871%), Swiss Chard (716%), Turnip Greens (662%), Dandelion Greens (471%), and Broccoli Raab (272%).