‌The composition and significance of Christmas tree models‌.

The model of the Christmas tree usually consists of several parts:

‌ Letter part‌: Indicates the type of wellhead device, such as oil wellhead, gas wellhead, etc.
‌ Number part‌: Indicates the maximum rated working pressure and the maximum main diameter.
‌ Other identifications‌: Such as steel grade, modified design number, etc.
For example, the model KYS24.5/65 means that this is a sulfur-resistant oil wellhead device with a maximum rated working pressure of 24.5MPa and a maximum main diameter of 65mm.

The specific meaning of the Christmas tree model
‌ Letter part‌:

K: Indicates sulfur-resistant wellhead device.
Q: Indicates gas wellhead.
Y: Indicates oil wellhead.
S: Indicates Christmas tree.
‌ Number part‌:

The first number: Indicates the maximum rated working pressure, such as 24.5MPa.
The second number: Indicates the maximum main diameter, such as 65mm.
‌ Other identifications‌:

Retrofit design number: For example, -65I, indicates retrofit design.