The primary differences between hard-seal ball valves and soft-seal ball valves in operational environments are evident in aspects such as sealing materials, temperature resistance, pressure ratings, and medium compatibility:
How to distinguish between hard seals and soft seals in ball valves
The distinction between hard seals and soft seals in ball valves is primarily based on sealing materials, operating conditions, and application scenarios.
Can the ball of a hard-sealed ball valve be made into a hollow ball?
The ball of a hard-sealed ball valve typically features a hollow structure, specifically a hollow ball design with flow channels.
What are the hardening methods for the ball and seat of a metal hard-sealed ball valve?
The hardening methods for the ball and seat of metal hard-sealed ball valves primarily include the following:
How is the ball of a hard-sealed ball valve generally treated?
The hardening treatment methods for the ball of a hard-sealed ball valve primarily include surface hardening, chemical heat treatment, thermal spraying, and weld overlay, among others.
Direction of pressure relief hole for low-temperature valves
The direction of the pressure relief hole in cryogenic valves should generally be toward the upstream side when the valve is closed to ensure safe release of abnormal pressure generated by the vaporization of the medium inside the valve cavity.
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