Air Operated Diaphragm Pumps

Answers to your most pressing air operated diaphragm pump questions

What Are Air Operated Diaphragm Pumps?

An air operated diaphragm pump, sometimes called a membrane pump, uses positive displacement to move fluid through a combination of valves on both sides of the diaphragm. Typical valve options include flap valves, butterfly valves, check valves or other varieties of shut-off valves. While extremely efficient and versatile, diaphragm pumps are also relatively inexpensive because of their simple operation and design.

Who Uses Them?

Air operated diaphragm pumps are used throughout many industries, including:

  • Food & Beverage
  • Printing & Ink
  • Mining
  • Water Treatment
  • Metal Fabrication
  • Construction
  • Pulp Mill
  • Railroad
  • Waste Removal

What Should I Consider When Buying a Pump?

When trying to select the right pump for your specific needs, there are many things you need to consider. Your prime concern will be choosing an adequate pump to meet the needs of your specific system. Applications range from small business use to large industrial applications. The typical inlet/outlet size range for air operated diaphragm pumps is one-fourth inch to 4 inches. Typical max flow ranges from around .one-fourth gallon a minute up to 300 gallons a minute. When selecting your pump, you should consider:

  • Do you need to submerge the pump?
  • Will you be working with hazardous materials?
  • What temperature restrictions do you have?
  • How much fluid do you need to move?
  • What is your budget?
  • What flow rate does your installation require?
  • What viscosity limits/capabilities do you need?

Talk to our experts to find just the right pump for your needs.

What Maintenance Is Required?

Like pumps of all types, regularly scheduled maintenance is crucial. Routine maintenance will extend the life of the pump and help prevent interruptions and downtime. Typical maintenance and cleaning for an air operated diaphragm pump would include:

  • Disassembly
  • Removal of valves
  • Removal of suction manifold
  • Valve inspection for excessive gouges or wear
  • Removal of pump chambers
  • Removal of inner and outer diaphragm plates
  • Removal of pump shaft and remaining diaphragm assembly
  • Inspection of both diaphragms and rubber bumpers for wear replacement, if needed
  • Inspection of inner clamp plate and sleeve bearings for wear or damage and replacement, if needed

What Are the Signs You Need to Repair or Replace Your Pump?

When not operating, signs your air operated diaphragm pump may need repaired or replaced include:

  • Slow processing
  • Electrical issues like frequently blown fuses
  • Increased drying times
  • Slow start or stalling
  • Overheating
  • Increased noise coming from the motor or bearings
  • Fouling of internal surfaces
  • Leakage
  • Reduced flow

Ask our experts for help diagnosing, troubleshooting and repairing pumps.

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