We may often see some letters or numbers on the valve body, and friends who are not familiar with the valve may be confused by these letters and numbers. As long as you study for a time,you will find these letters and numbers are very useful.

For example, on the stainless steel ball valve body, the words CF8 / CF8M are often seen. These words stand for the material of the valve body. CF8 / CF8M are American standards. Their corresponding domestic steel codes are cast stainless steel 304 and cast stainless steel 316, and . The chinese goverment requires that the valve body material (such as CF8 / CF8M), nominal diameter (such as DN150 DN60), nominal pressure (such as PN16, PN40), steel furnace number (such as 7538), etc., is equivalent to providing users with the valve parameter information and identity proof, which helps users better master the use of valves.