Generally, the valve seat material of the ball valve is non-metallic, such as PTFE, which limits the application of the ball valve. Generally, ball valves cannot be used in high-temperature working conditions, granular media and ash removal systems. In view of this situation, after years of efforts to research and develop a metal sealed ball valve. Including floating type and fixed type, so that ball valves are widely used in petroleum, chemical, metallurgy, polysilicon, power and other industries.

In addition to the structural features of preventing wrong operation, preventing the valve stem from falling out, and setting the installation platform of the drive device, the metal sealed ball valve also has the following unique features:

Advanced ball and valve seat hardening technology

The ball and valve seat of the metal sealed ball valve are completely metal to metal sealed. To ensure the reliable sealing of the valve under various temperatures and pressures, the valve is designed according to different operating conditions and requirements of users. A variety of advanced hardening technologies for ball and valve seat can be used, including supersonic spraying, nickel base spray welding, special surface hardening, hard alloy spray welding, and the use of high-strength and high hardness ceramic materials. The surface hardness of ball and valve seat can generally reach above HRC60. Up to HRC74. The temperature resistance of the sealing surface material can generally be 540 ° C. Up to 980 ° C. The bonding strength of the material can reach above 10000PSI. The sealing surface material also has good friction resistance, impact resistance and other properties. Metal sealed ball valves can be applied to most severe working conditions, such as polysilicon projects.

Prevent the valve from locking under high temperature

Under high temperature conditions, the ball and valve seat are easy to lock due to thermal expansion, which will lead to the failure of valve opening. The metal sealed ball valve adopts the patented sealing structure of disc spring or spring loading. The thermal expansion of parts under high temperature can be absorbed by disc spring or spring, so it can ensure that the valve will not be inflated under high temperature and can be opened and closed flexibly under high temperature.

Excellent sealing performance

The unique ball valve grinding process is adopted to rotate the ball and grinding tool in different directions in space. The ball surface can reach extremely high roundness and smoothness, and the sealing performance of the valve can fully meet or exceed the standard requirements.

Anti static structure design

The valve body, valve seat, ball and other metal parts of the metal sealed ball valve are in close contact. The electrostatic channel is naturally formed, therefore. The metal hard seal ball valve does not need to be equipped with a special anti-static device.

Double block and release function

The metal sealed fixed ball valve generally adopts the sealing structure of the valve seat in front of the ball. The two valve seats of the metal hard seal fixed ball valve can independently cut off the medium at the inlet end and outlet end, realizing the double blocking function. When the ball valve is closed, both ends of the inlet and outlet of the valve are pressurized at the same time. The middle chamber and channels at both ends of the valve can also be blocked from each other. The remaining medium in the middle chamber can be discharged through the relief valve.