Air-operated double diaphragm pumps (AODD pumps) are commonly used in shipyards for various pumping applications, including the transfer of crude oil and water. These pumps are popular in maritime industries due to their rugged construction, ability to handle a wide range of fluids, and suitability for use in potentially hazardous environments.
Operating Principle: AODD pumps use compressed air to operate. They consist of two diaphragms, which are flexible membranes that move back and forth in a pumping chamber. When air is introduced into one chamber, it flexes one diaphragm, creating suction and drawing fluid into the pump. Simultaneously, the other diaphragm is pushed outward, discharging the fluid. Then, the process reverses as the air pressure alternates between the two chambers.
Versatility: AODD pumps can handle a wide range of fluids, including viscous liquids like crude oil and water. They can also handle solids and abrasive materials, making them suitable for pumping various substances encountered in shipyard operations.
Durability: These pumps are designed for durability and reliability in harsh environments. They often feature corrosion-resistant materials like stainless steel or aluminum, making them suitable for use in marine environments where exposure to saltwater and other corrosive substances is common.
Self-Priming: AODD pumps are typically self-priming, meaning they can evacuate air from the suction line and create a suction lift without the need for external priming assistance. This feature is advantageous in shipyard applications where the pump may need to operate in conditions where air may be present in the fluid lines.
Safety: Since AODD pumps are powered by compressed air rather than electricity, they can be safer to use in potentially explosive atmospheres, such as those found in shipyards where flammable liquids like crude oil are handled.
