Valve cover and valve trim assembly and related methods

Valve cover and valve trim assemblies and related methods are described. An example bonnet and valve trim assembly includes a bonnet configured to be coupled to a valve body via a valve body mounting flange, the bonnet including a cage mounting interface. A cage defining the body has a bonnet mounting interface to couple to a cage mounting interface of the bonnet. The retainer holds the cage mounting interface and the bonnet mounting interface to couple the cage and the bonnet. The retainer enables axial movement between the cage and the bonnet when the retainer is coupled to the cage and the bonnet. 描述了阀盖和阀内件组件以及相关方法。示例阀盖和阀内件组件包括阀盖，该阀盖被构造为经由阀体安装凸缘耦接到阀体，该阀盖包括阀笼安装接口。限定主体的阀笼具有阀盖安装接口，以耦接到阀盖的阀笼安装接口。保持器保持阀笼安装接口和阀盖安装接口以耦接阀笼和阀盖。当保持器耦接到阀笼和阀盖时，保持器使得阀笼与阀盖之间能够进行轴向移动。