A diaphragm pump is a type of positive displacement pump that uses a flexible diaphragm to move fluids or gases. It operates by repeatedly expanding and contracting the diaphragm to draw in and push out the fluid or air through check valves, creating a steady flow.
How It Works:
- Suction Stroke: The diaphragm moves away from the chamber, creating a vacuum that draws in fluid or air.
- Discharge Stroke: The diaphragm pushes back in, forcing the contents out through an outlet valve.
The diaphragm is usually made of rubber, Teflon, or elastomer, and the motion is driven by air pressure, mechanical linkage, or electric motor.
Key Features:
- Oil-free operation – no contamination
- Self-priming – starts without manual priming
- Can run dry – without damage (in most models)
- Handles viscous or corrosive fluids – chemical-resistant versions available
Common Applications:
- Medical suction and lab equipment
- Chemical transfer and dosing
- Food and beverage dispensing
- Printing and ink handling
- Water treatment and sampling
Summary:
A diaphragm pump is a versatile, clean, and reliable pump ideal for handling air, gas, or fluid, especially in chemical, medical, and industrial settings. Its oil-free and leak-free operation makes it perfect for applications requiring precision and purity.