The foot valve adopts a manually controlled reversing valve. The function of the valve is subdivided into two-position three-way and two-position five-way. It is small in size, beautiful in appearance, and has panel installation. The advantage of the foot valve is that it adopts an integral slotted slide valve structure and is easier to operate. The valve hole is processed with high-precision finishing process to ensure a longer service life. Using a machining center to process the valve body has higher processing accuracy. It adopts the first oxidation and then spray painting process to double protect the valve body and adapt to the harsher environment. Before use, please check the components to see if they are damaged during transportation, and then install and use them. When installing, please pay attention to the gas flow direction and whether the pipe connection is correct. Pay attention to dust prevention. It is recommended to install a muffler or muffler throttle valve on the exhaust hole. When connecting pipelines, be sure that the anti-diarrhea tape should not be wrapped beyond the tooth end surface, and be careful to eliminate metal particles, dust and oil stains in the pipe joints and pipes.