A pneumatic piston pump, also known as an air-operated diaphragm pump, is a type of positive displacement pump that utilizes compressed air or gas to transfer fluids. It is widely used in various industries for pumping liquids with varying viscosities, including chemicals, paints, adhesives, sludges, and more. The pump operates based on the reciprocating action of a piston driven by pneumatic pressure, allowing for efficient and reliable fluid transfer. The working principle of a pneumatic piston pump can be broken down into several key steps: Pneumatic pressure supply: The pump is connected to a source of compressed air or gas, typically at a regulated pressure. This air supply acts as the driving force for the pump's operation. Air distribution system: The pump is equipped with an air distribution system, consisting of control valves, air chambers, and diaphragms. These components regulate the flow of compressed air into specific areas of the pump to initiate and control the reciprocating motion of the piston. Intake stroke: When the compressed air is directed to the appropriate chamber, it pushes against the diaphragm connected to the piston. This creates a partial vacuum in the pump's inlet chamber, causing the fluid to be drawn into the pump through an inlet valve. The fluid flows into the pump's chamber as the piston moves away from the inlet, enlarging the space within the chamber. Compression stroke: As the piston reaches the end of its intake stroke, the air distribution system redirects the compressed air to the opposite side of the pump. This pushes against the diaphragm connected to the piston, causing the piston to move in the opposite direction. This motion reduces the volume of the pump's chamber, compressing the fluid inside.