A、Spring-centered valve
B、Unloading valve
C、Three-position valve
D、Two-position valve
更多“Which of the valves listed is NOT considered to be a hydraulic system directional control valve?（）”相关的问题
A、The condenser and the expansion valve B、The king valve and the solenoid valve C、The compressor and the expansion valve D、The condenser and the solenoid valve
A、The profile of the valve is like a globe B、The valve seat is set into the bulbous body C、The plug or disc of the valve is made vertical to the axis of the pipe D、The valve seat is located at right side of the plug or disc
A、the beveled edges of the intake valves provide for serf-centering during seating B、intake valves utilize stellite-coated valve seat inserts which reduce wear C、the volume of air passing through intake valves is less than the volume of air passing through exhaust valves D、intake valves are less affected to the corrosive action of exhaust gases
A、The diameter of a disc is the same as the outer diameter of the pipe B、We can infer that the valve is opened or closed by rotating the spindle C、A butterfly valve comprises a disc and a ring body D、The profile of the butterfly valve is a ring body
A、the SW outboard valves B、the tailshaft LO stop valve C、the drain valve of the boiler D、propeller shaft sealing device
A、the direct acting relief valve is used for controlling lower flows and pressure B、the pilot operated relief valve is used for controlling higher flows and pressure C、the pilot operated relief valve is used for controlling lower flows and pressure D、the controlling accuracy of direct acting relief valve is worse than that of the pilot operated relief valve
A、The globe valve may be suitable for partially open operation B、The globe valve will give full bore flow with change of direction C、The gate valve gives full bore flow with change of direction D、The gate valve is suitable for full bore operation only
A、Pressure-reducing valve B、Unloading valve C、Counterbalance valve D、Pressure-relief valve
A、Holding the valve open for a long period B、Increasing the starting air pressure used C、Opening the stating air valve quickly D、Reducing the starting air valve size
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