| 摘要 |
A check valve has a sleeve threaded to a seat so that an adjusting rod, a valve rod and a spring can be installed therein. The sleeve has a water inlet and a plurality of through holes so that when water flows into the valve body from the water inlet of the sleeve, the pressure of the water flow will press the valve rod to move upwards. Then water will flow out from the through hole of the sleeve. When the valve rod moves downwards, the pressures of the water flow and the spring will seal the water inlet to prevent the water flows reversely. Furthermore, the valve body has an integral structure. No part will lose in maintenance. Moreover the assembly speed will be increased.
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