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Air operated piston pump technology works by utilizing compressed air to generate force and move a piston within a cylinder. As air is supplied to one side of the piston, it creates pressure, causing the piston to move and draw in fluid through an inlet valve. When the air is released and supplied to the other side of the piston, it pushes the fluid out through an outlet valve, enabling the pump to transfer fluids effectively.
Piston pumps are used in a wide variety of fluid handling applications. The majority of these can be broken down into four different categories:
This involves application of material by either spray or dipping. Coating applications use 2-ball and 4-ball pumps.
Moving a low-to-medium viscosity fluid from one location to another. 2-ball and 4-ball style pumps are the most frequently used in transfer applications.
Involves using a piston pump to apply medium-to-high viscosity materials. Typical extrusion applications require accessories like rams and fluid regulators to meet customer requirements. Chop-check and 2-ball pumps are used in extrusion applications.
Moving a low-to-medium viscosity fluid from one location to another. 2-ball and 4-ball style pumps are the most frequently used in transfer applications.
Ratio is the effective area differential between the air motor piston and the lower end plunger rod. An 11:1 ratio indicates the pump air motor piston has 11 times the effective area of the fluid handling piston.
Higher ratio pumps produce higher fluid pressures which allows them to either move higher viscosity fluids or transfer fluids longer distances.
Packing seals are used to seal movement of the plunger rod, both inthe throat seal and piston seal areas of the pump. They are made ofdifferent materials to ensure chemical and material compatibility tomaximize service life.
UHMW-PE (Ultra-High Molecular Weight Polyethylene) – Anall-purpose packing material that provides excellent abrasionresistance. Commonly used with inks, acids, and some solvents.
PTFE Compatible with all fluids. Provides excellent corrosionresistance but minimal abrasion resistance. Commonly used withcorrosive chemicals, ketone, acids, and room-temperature vulcanizing(RTV) materials.
Leather Commonly used in combination with UHMW-PE packings forexcellent sealing and abrasion resistance. UHMW-PE and leather aremost often used when pumping inks.
Staggered Combining packing seals made of different materialcombinations can often maximize service life by utilizing thestrengths of both materials.
