What are the national standard requirements for ball valve stem installation?

Date: 2025-12-31Views: 557

The national standard GB/T 12237 "petroleum, petrochemical and related industrial steel ball valves" in the provisions of the ball valve stem should be designed to the pressure of the medium, the removal of the stem sealing packing (such as the removal of the packing gland), the valve stem will not be washed out of the valve body structure.