Structural features:

1, shell precision casting and resin sand casting process, smooth appearance, uniform organization;

2, sealing surface material matching, to ensure the sealing surface high hardness and hardness difference; Precision grinding, wear resistance, corrosion resistance, effectively prolong the service life;

3, high pressure water strength, air tight test, non-destructive testing and other multi-channel detection, to prevent leakage outside the shell;

4, valve stem surface by precision grinding, improve the anti-abrasion performance, effectively reduce the closing torque, easy operation;

5, the use of special corrosion inhibition filler structure design, temperature and pressure resistance, no corrosion, no leakage.