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.
Nutritional Value of Iceberg Lettuce. Iceberg lettuce is one of the main constituents in salads and is known for its crunchy texture. It has comparatively less nutrients than the other greens that you may find in salads. Nutritional Facts of Iceberg Lettuce. Iceberg lettuce is an excellent source of potassium and manganese, as well as a very good source of iron, calcium, magnesium, and phosphorous. It also contains traces of sodium, copper, and zinc.