Introduction
Pneumatic diaphragm pumps are pumps that move fluids using pressurized air. This type of pump is also known as air operated double diaphragm pumps(AODD), or membrane pumps. It works by converting the energy of compressed air into a reciprocating motion, which then moves a diaphragm between two chambers.This process creates suction and discharge actions, which allows liquid to move through the pump and thus transport fluid from one place to another.
Application
Pneumatic diaphragm pumps are used in many industrial applications, including oil and gas, agriculture, chemicals and water and wastewater treatment. These pumps are also increasingly being used in medical applications as they can be operated and delicately fine-tuned to accurately control the flow, volume and pressure of a range of liquids and gases. In addition, they are able to accurately handle hazardous and corrosive fluids, often without the need for external lubrication.
Another major advantage of using a pneumatic diaphragm pump is their compact design, which makes them an ideal choice for installations where space is limited. These pumps can also be run on a range of power sources, such as compressed air, or hydraulically powered, which means they can be used for a variety of applications.
Principle of Operation
The main component of a pneumatic diaphragm pumping system is a plate of flexible, compressible material which separates two distinct chambers. These chambers are connected by a connecting rod, which extends from one chamber to the other.
When pressurized air is applied to the plate, it expends and causes the membrane to move outward. As the membrane moves outward it reduces the volume of the upper chamber, creating a vacuum and resulting in the intake of fluid from the inlet side of the pump. This fluid is then forced into the lower chamber as the membrane is pulled inward, creating a pressure within the lower chamber which forces the fluid out of the outlet port.
This cycle is repeated repeatedly, allowing the fluid to be circulated through the pump and moved from one point to another. This type of pump is also advantageous as it allows for a wide range of adjustments to be made to the flow, pressure and volume of the liquid.
Conclusion
Pneumatic diaphragm pumps are becoming increasingly popular due to their versatility and ease of use. These pumps are able to accurately handle hazardous and corrosive fluids and can be run on a range of power sources. Their compact size also makes them an ideal choice for installation in tight spaces.
