The through passageway of plug valve has less water head loss as under similar flow capacity the pressure loss of the plug valve is less and the power consumption is lower, and it is more obvious along the enlarging of the diameter of the valve.

The country lays a firm foundation on manufacturing technology of valves as compared with imported products, while the manufacturer makes meticulous design and construction that national air reversing valve can keep pace with world famous brands, or make further innovation.