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.
The daily requirement for vitamin K is most commonly reached through diet, and leafy greens such as butter lettuce are rich in vitamin K. A 1-cup serving of chopped butter lettuce contains more than 56 micrograms of vitamin K. The recommended dietary intake for potassium for adults over 19 is 90 micrograms.utter lettuce in field Photo Credit bangkokhappiness/iStock/Getty Images. Butter lettuce is a variety of butterhead lettuce, known for its smooth, loosely bunched, tender leaves.