1. Wear resistance: since the core of hard seal ball valve is alloy steel spray welding and the seal ring is alloy steel surfacing, hard seal ball valve will not have too much wear when opening and closing. (Its hardness coefficient is 65-70)
2. Good sealing performance: since the hard seal ball valve is sealed by manual grinding, it cannot be used until the valve core and the seal ring are completely matched. Therefore, its sealing performance is reliable.
3. Light switch: since the bottom of the seal ring of the hard seal ball valve uses a spring to tightly hold the seal ring and the valve core together, the switch is very light when the external force exceeds the pre tightening force of the spring.
4. Long service life: It has been widely used in petroleum, chemical industry, power generation, paper making, atomic energy, aviation, rocket and other departments, as well as in people's daily life.
