Description

A pneumatic diaphragm pump uses compressed air to drive two diaphragms in alternating reciprocating motion, utilizing volume changes and a check valve for continuous liquid intake and discharge.

This type of pump uses compressed air as its sole power source, requiring no electricity, and is inherently safe. It is suitable for conveying flammable, explosive, high-viscosity, particulate, or corrosive media. Its operation consists of two alternating strokes:

Intake Stroke: Compressed air enters one chamber, pushing the diaphragm on that side towards the liquid chamber, squeezing out the liquid. Simultaneously, the diaphragm on the other side is pulled back by a connecting rod, increasing the volume of the corresponding liquid chamber, creating negative pressure, opening the inlet check valve, and drawing in liquid.

Discharge Stroke: When the stroke reaches its end, the air distribution valve automatically switches the airflow direction, allowing compressed air to enter the other chamber, pushing the diaphragm on the original intake side in the opposite direction, expelling the liquid, while the original discharge side begins to draw in liquid.