Graco Diaphragm Pumps
An air operated diaphragm pump is a type of positive displacement pump that uses compressed air as a power source. Each side of the pump houses two separate diaphragms operating individually, which fill with fluid before being discharged through an outlet manifold.
This design is primarily driven by an air valve located within the pumps central chamber. Their working principle is when a vacuum is created in one diaphragm it causes the balls on the suction side to rise from their seats, allowing fluid to enter the diaphragm, whilst simultaneously causing the balls located close to the discharge manifold to seal against their seats.
Compressed air is shifted from one chamber to the other by a linked shaft that allows the chambers to move simultaneously. The rapid changeover allows for reduced pulsation at the outlet.
The NFS promoted range of double diaphragm pumps come in a wide range of metal and plastic pumps. You can also choose from a wide selection of materials to handle numerous applications, including corrosive and abrasive fluid transfer. Advantages of these are as they are a positive displacement, and capable of operating without fluid or dry run, they can prime up to 8M without issue.
Diaphragm pumps are a versatile product that is used in many applications and industries pumping fluids such as water, oil, waste oil, diesel, acids, foods, and slurry. They can be easily controlled to accommodate high viscosities without risk of failure. They can also be installed in many scenarios. From immersed, to container emptying, under positive suction, for the pumping and mixing of fluids simultaneously such as Part A and Part B glues, paints, and bonding agents either separately or blending. Each membrane pump is thoroughly tested before it leaves the supplier.
Furthermore, pumps can easily be stripped and therefore maintained simply with minimal parts all available from NFS