What component often includes a dashpot to cushion its action?

The rising stem globe valve is designed with a dashpot to cushion its action during operation. A dashpot serves a critical function in absorbing the kinetic energy of the moving parts as they engage or disengage, ultimately providing a smoother transition. This cushioning effect is particularly beneficial in applications where rapid opening or closing could cause water hammer or other damaging hydraulic shocks within the system.

In the case of the rising stem globe valve, the dashpot helps control the speed at which the valve opens or closes, ensuring that it does not operate too quickly, which could lead to mechanical failures or unreliable flow control. Additionally, the design of the globe valve with its rising stem helps in providing a clear indication of the position of the valve, complementing the dashpot's function by maintaining precise control over flow rates and pressure.

Comparatively, other types of valves listed, such as check valves, lift check valves, and tapered plug valves, do not typically incorporate dashpots in their design for cushioning. They rely on other mechanisms to manage flow effectively without the need for a dashpot's cushioning function.