To understand its operating principle, it is essential to first clarify the functions of its core components. The main structure of a PTFE pneumatic diaphragm pump consists of the following parts:

1.Dual Diaphragm Assembly: 

Comprising two elastic diaphragms made of PTFE material, connected by a central linking rod and symmetrically arranged on both sides of the pump chamber. PTFE's high chemical stability enables it to resist corrosion from strong acids, alkalis, and organic solvents, while its low friction coefficient minimizes medium adhesion.

2.Air Valve System: 

Includes an air inlet and a directional control valve (often ball valves or rotary vane valves), responsible for controlling compressed air to alternately enter the back cavities of the diaphragms on either side, driving their reciprocating motion.

3.Inlet and Outlet Valve Sets:

 Each side of the pump chamber is equipped with independent check valves (typically ball valves or butterfly valves), consisting of an inlet valve (suction side) and an outlet valve (discharge side) to ensure unidirectional liquid flow.

4.Pump Body and Connection Flanges:

 Mostly made of metal or reinforced plastic materials, these provide a sealed chamber and connect pipelines.