Valve guide supports the valve stem and guides its movement so that the valve face remains perfectly concentric with the valve seat and fits it without any skewing.
举一反三
- In order to ensure that the pressure difference between the front and rear of the throttle valve remains unchanged when the load changes, the flow through the throttle valve is basically unchanged. The throttle valve is often connected with ( ) to form a speed control valve, or the throttle valve and ( ) are connected in parallel to form a bypass speed control valve. A: Pressure reducing valve B: constant pressure reducing valve C: overflow valve D: differential pressure relief valve
- The needle valve in a fuel valve will () when the fuel pressure action on the needle valve tapered face exerts a force lower than that of the spring compression.
- A throttle valve is a simple flow control valve, a throttle valve is virtually equal to( ).
- The word "valvulotome" means _______________. A: incision of a valve B: an opening of the valve C: an instrument for cutting a valve D: surgical repair of a valve
- The commonly used pressure control valve in hydraulic transmission system is ( ) A: directional valve B: relief valve C: hydraulic control check valve