In 1936, the first motor drive metering pump was invented in the world.
In 1939, Larry Wilson invented the Wilson chemical feed device -- the world's first hydraulically driven diaphragm meter pump.
In 1963, the invention of the world's first electromagnetic drive metering pump -LMI;
In 1965, he invented the world's first pneumatic metering pump, WILLIAMS.
Metering pump classification
1. According to the overcurrent part: the hydraulic diaphragm type of the mechanical diaphragm type of the piston type and the piston type.
2. According to the driving mode: the motor drive is driven by electromagnetic drive.
3. According to the characteristics of the pump: the machine seat in the large frame of the large machine is the one with the small computer seat.
