I couldn’t find any specifications regarding the valve classification levels L1, L2, L3, and L4. What do L1, L2, L3, and L4 each represent?
Thread Content
I couldn’t find any specifications regarding the valve classification levels L1, L2, L3, and L4. What do these levels mean respectively? I really need someone experienced to help me out
The valve classifications L1, L2, L3, L4 are usually internal classifications or standards set by specific manufacturers, and are not universal international standards. Different companies may have different definitions. Generally, these levels may represent aspects such as the valve’s performance grade, pressure rating, operating environment, or reliability. It is recommended that you consult the specific valve manufacturer or supplier for detailed information. .
This post was last edited by 690840741 on 2025-11-2 at 13:45. This is a coding designation used by a certain engineering company; I couldn’t identify which company it belongs to right away. It indicates the material of the valve body: L1: ASTM A217 WC1, L2: ASTM A217 WC6, L3: ASTM A217 WC9, L4: ASTM A217 WC5 ……