This diagram shows the decomposition structure of a nickel alloy valve, and its components and functions are as follows:
Main structural components
1.BODY：As the basic frame of nickel alloy valves, it is usually cast or forged from high-strength nickel alloy materials. It has good corrosion resistance and strength, can withstand the pressure and temperature changes of the medium, provides installation space for the internal components, and connects the piping system so that the medium can pass through or cut off smoothly.
2.END FLANGE：Located at both ends of the valve body, it is connected to the flange of the pipe by bolts, which is convenient for the installation, removal and maintenance of the valve. The nickel alloy end flange ensures a tight connection and structural stability, preventing leakage under high pressure, high temperature or corrosive media.
Seal critical components
1.SEAT RING：There are 2 of them, which are installed in contact with the ball inside the valve body. The seat ring is made of wear-resistant, corrosion-resistant nickel alloy or special sealing material, which has high surface accuracy and can be closely attached to the ball, preventing the flow of media when the valve is closed, and realizing the sealing function.
2.SEAT SEAL：There are also 2, usually elastomeric sealing elements, which are further enhanced by matching the seat rings. Under different working conditions, such as temperature and pressure fluctuations, the seat seal can maintain good elastic deformation, and is always in close contact with the ball and seat ring to prevent media leakage.
Control the operating parts
1.STEM：It is a key component to realize the opening and closing operation of the valve, and drives its rotation through external driving devices (such as handwheels, electric actuators, etc.). The stem is generally a solid or hollow nickel alloy rod with sufficient strength and rigidity to transmit the operating torque and ensure that it will not be deformed or damaged under frequent operation.
2.STEM HOUSING：Wrap the valve stem to protect it from external impurities and media intrusion that affects the normal operation of the valve stem. At the same time, there is a sealing device inside the stem housing to prevent the medium from leaking along the stem to the outside of the valve.
3.BALL：The core control element of the valve is a sphere with a round through-hole made of high-precision machined nickel alloy. The ball can rotate freely in the valve body, and when the through hole of the ball is aligned with the axis of the pipeline, the valve is opened, and the medium can pass through; When the sphere is rotated 90 degrees and the through-hole is perpendicular to the pipe axis, the valve closes, cutting off the flow of media.
Auxiliary support components
1.GLAN & GLAND FLANGE：The gland is installed on the top of the stem housing, and the gland flange is connected to the stem housing by bolts, and they work together to seal the stem and ensure the sealing performance at the stem. During the operation of the valve, the bolts of the gland flange can be adjusted to compensate for the wear of the sealing material and maintain a good sealing effect.
2.TRUNNION & TRUNNION COVER：The journals are mounted at both ends of the sphere to provide support and a rotating shaft for the sphere. The journal cover is used to hold the journal in place and prevent it from loosening. This design reduces the friction of the ball as it rotates, making operation easier, while also improving the life and stability of the valve.
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