Product Categories
- Centrifugal Pump
- Gear Pump
- Single Screw Pump / Progressing Cavity Pump
- Twin Screw Pump
- Three Screw Pump
- Dosing/Metering/Chemical Injection Pump
- Reciprocating/Plunger Pump
- Peristaltic Pump
- Hose Pump
- Diaphragm Pump
- Piston Diaphragm Pump
- Lobe & Circumferential Piston Pump
- Agitator & Mixer
- Blower
- Vacuum Pump
- Dissolved Air Flotation (DAF) or Micro Air Bubble Generator
DIAPHRAGM PUMP
A diaphragm pump is a type of positive displacement pump that uses a flexible diaphragm, along with check valves, to move fluids. This type of pump is known for its ability to handle a wide variety of fluids, including those that are viscous, abrasive, corrosive, or contain particulates, making it versatile and widely used across many industries.
Working Principle
Suction Stroke:
The diaphragm is pulled back, creating a vacuum inside the pump chamber.
The vacuum causes the inlet check valve to open, allowing fluid to enter the chamber.
Discharge Stroke:
The diaphragm is pushed forward, increasing the pressure inside the pump chamber.
The increased pressure forces the inlet check valve to close and the discharge check valve to open, pushing the fluid out of the pump.
Key Components
Diaphragm: A flexible membrane that moves back and forth to create a pressure differential, driving the fluid flow.
Pump Chamber: The space where the fluid is drawn in and expelled.
Check Valves: One-way valves that ensure the fluid flows in the correct direction through the pump.
Actuator: The mechanism that moves the diaphragm, which can be powered by air, electricity, or hydraulics.
Casing: The outer structure that houses the diaphragm and other components.
Types of Diaphragm Pumps
Air-Operated Double Diaphragm (AODD) Pumps:
Operated by compressed air.
Have two diaphragms working alternately to move the fluid.
Electrically Operated Diaphragm Pumps:
Powered by an electric motor.
Typically used for more precise dosing and metering applications.
Hydraulically Operated Diaphragm Pumps:
Use hydraulic fluid to move the diaphragm.
Suitable for high-pressure applications.
Applications
Chemical Processing: Handling corrosive and abrasive chemicals.
Water and Wastewater Treatment: Pumping sludge, chemicals, and other fluids.
Oil and Gas Industry: Transferring oil, chemicals, and other fluids.
Food and Beverage Industry: Handling food products, additives, and cleaning solutions.
Pharmaceuticals: Precise dosing and handling of sensitive fluids.
Advantages
Versatility: Capable of handling a wide range of fluids, including those that are viscous, abrasive, or contain solids.
Self-Priming: Can lift fluids from a lower level, making them suitable for various applications.
Seal-Free Design: The diaphragm acts as a barrier, preventing the fluid from contacting moving parts and reducing the risk of leaks.
Dry Running Capability: Can run dry without damage, which is useful in many industrial settings.
Simple Maintenance: Typically easy to maintain and repair due to the straightforward design.
Disadvantages
Pulsating Flow: The nature of the diaphragm movement can cause pulsations, which might require additional damping in sensitive applications.
Limited Flow Rates: Generally have lower flow rates compared to some other types of pumps.
Potential for Wear: The diaphragm and check valves can wear over time, especially when handling abrasive fluids, necessitating periodic replacement.