Double Diaphragm Pumps
Graco’s diaphragm pumps are designed for industrial and chemical transfer applications. Our chemical and industrial diaphragm pumps come in pneumatic and electric options, with many flow rates and sizes. Both metal and plastic housings can easily handle corrosive and abrasive fluids. All of our industrial diaphragm pumps are thoroughly tested before they leave our factories.
RUGGEDLY CONSTRUCTED FOR HARSH ENVIRONMENTS
Air Operated and Electric Double Diaphragm Pumps for Many Applications
Designed with fewer parts than competitive pumps, Graco’s air operated double diaphragm pumps features our stall-free, low pulsation air valve, which is externally accessible—ensuring rapid changeovers and minimum downtimes.
Graco’s electric double diaphragm pumps (EODD) are ideal for applications that require low pulsation and a smooth flow. Our energy efficient electric drive reduces energy consumption up to 5x compared to traditional air operated diaphragm pumps.
Each pump is ruggedly constructed to resist corrosion and deliver a long, trouble-free product life.
Customizable Fluid Sections
Easily customize your fluid selections with Graco’s chemical transfer pumps with housings that can handle all fluids, including corrosives and abrasives.
Multiple Power Sources
Depending on your manufacturing needs, Graco’s double diaphragm pumps are available in both air and electric configurations. Each offers a similar range of features and benefits.
We design and build our double diaphragm pumps to hold in the harshest working environments. The best materials and the highest quality standards results in pumps that are built to last.
An air operated diaphragm pump is a type of positive displacement pump that uses compressed air as a power source. The compressed air is shifted from one chamber to the other by a linked shaft that allows the chambers to move simultaneously. This back-and-forth motion, forces liquid out of one chamber and into the outlet manifold, while filling the opposite fluid chamber via the inlet manifold. Upon changeover, the fluid section that was filled on the previous shift empties into the outlet manifold and the fills the opposite chamber via the inlet manifold. The rapid changeover allows for reduced pulsation at the outlet.
The difference from an air-operated diaphragm pump is the center section of this pump as it uses an electric drive instead of compressed air. The center section of this pump is filled with pressurized air and is mechanically moved left/right by the motor so it pushes and pulls the diaphragm from left to right. This back-and-forth motion, forces liquid out of one chamber and into the outlet manifold, while filling the opposite fluid chamber via the inlet manifold. Upon changeover, the fluid section that was filled on the previous shift empties into the outlet manifold and the fills the opposite chamber via the inlet manifold. The smooth changeover allows for reduced pulsation at the outlet.
The Graco diaphragm pumps come in a wide range of air operated and electric diaphragm pumps (ATEX models available). You can also choose from a extensive selection of materials to handle numerous applications, including corrosive and abrasive fluid transfer.
Not sure how to select your pump? Use our pump configuration tools to select the ideal pump for your application:
- Step 1 – Check our Chemical Compatibility Guide to determine compatible materials
- Step 2 – Go to our Materials of Construction Guide to determine the most cost effective match
- Step 3 – Use our Air Operated Diphragm Pump Selector Tool or Electric Operated Diaphragm Pump Selector Tool to configure your pump.