Wear resistance: Since the valve core of a hard-sealed ball valve features a spray-welded alloy steel surface and the sealing ring is hard-faced with alloy steel, the valve experiences minimal wear during opening and closing operations (with a hardness rating of 65–70 HRC).
Excellent sealing performance: The sealing surfaces undergo manual lapping to ensure a perfect fit between the valve core and the sealing ring before use, resulting in reliable sealing performance.
Ease of operation: A spring mechanism at the base of the sealing ring ensures it maintains tight contact with the valve core; consequently, the valve operates smoothly and requires little effort once the applied force exceeds the spring's preload.
Long service life: These valves are widely used across various sectors-including petroleum, chemicals, power generation, papermaking, nuclear energy, aviation, and aerospace-as well as in everyday life.