Test pump according to its different forms of power, can be divided into electric pressure test pump, manual test pump and electric hand-held pressure test pump, the following is about the pressure test pump electric pressure test pump and manual Test pressure pump introduction. Test pump classification and principles First, the function of electric pressure test pump power machine (such as motors and internal combustion engines, etc.) of mechanical energy into liquid pressure energy. It works by the cam driven by the motor rotation. As the cam pushes the plunger up, the seal formed by the plunger and the cylinder decreases in volume, the oil is squeezed out of the sealed volume and drained through the check valve to where it is needed. When the cam rotates to the descending part of the curve, the spring forces the plunger down to create a certain degree of vacuum, and the oil in the tank enters the sealed volume under atmospheric pressure. The cam continuously raises and lowers the plunger, periodically reduces and increases the volume of the seal, and the pump continues to suck and drain oil. So work back and forth to achieve the rated pressure test. Second, the manual test pump function is to manually convert mechanical energy into liquid pressure. Its working principle is that when the manual pressure test pump plunger is lifted by the handle, a vacuum is generated in the pump body, the water inlet valve opens the water and enters the pump body through the water inlet filter, the water inlet pipe enters the pump body, the water inlet valve is closed when the handle force is pressed, Outlet valve top open, the output pressure water, and enter the device under test, so reciprocating work to achieve the rated pressure test. Extended reading: Top ten brands of motor China Construction Water Exhibition Pump manufacturers ranked ptc exhibition industry Internet (Xiamen) Technology Co., Ltd. Asia Pump Network Editor: He Daohui (QQ / WeChat: 2355962924) http://beng.liuti.cn/ (service Hotline: 400-6030-811)