Diaphragm Pump Questions

Your Questions Answered

Where can these pumps be used?

Air Operated Diaphragm Pumps can be used in a range of applications from chemical processing to paint and other viscous liquids and are a great option for dewatering in the mining industry. Being 100% air-operated makes them safe for flammable and hazardous areas. There are also hygienic/FDA approved versions for the food and beverage industry.

What are the main features of Price Pumps Air Operated Diaphragm Pumps?

  • Self-priming
  • Can run dry without damage
  • Available in Polypropylene and Ductile Iron for different liquids and chemicals
  • Our diaphragm pumps are anti-freezing. Meaning that they are non-stalling and are lube free
  • Leak-free

How many sizes and materials are available?

Presently we have six different sizes available ranging from 1″ to 4″ manufactured in Polypropylene and Ductile Iron.

How do I know what type of Air Operated Diaphragm pump to buy?

It is important to match your requirements to the pump’s characteristics. Here are the five important considerations for choosing an AODD pump:

  1. Fluid – The makeup of your process fluid is crucial to the choice of pump. Does it have special chemical or corrosive requirements? Is it clean or does it contain particles (slurry)?
  2. Viscosity – More viscous fluids require more robust pumps to move them.
  3. Flow rate – It is important to know how much liquid you need to move per unit time in order to choose both the correct size pump and the correct size of piping.
  4. Pressure – The pressure is a major factor, and closely intertwined with the flow rate, in choosing an appropriate pump. Refer to your pump’s “pump curve” graph to help determine the relationship between flow and pressure.
  5. Temperature – The temperature of the liquid being pumped is important when making your choice of pump.

What kind of fluid does a Diaphragm Pump transfer?

Any kind. Examples include water, acids, and lubricants. AODD pumps will handle viscous fluids as long as the viscosity has been taken into account when choosing the pump and designing the system, as some highly viscous fluids require large bore piping to be adequately pumped.

Are there specific considerations For Diaphragm Pumps?

Polypropylene: The Polypropylene pumps can change shape slightly over time and require more frequent inspections to make sure that the bolts holding the pump casing, haven’t become loose. The only other consideration for a plastic pump is to ensure that that fluid being pumped is compatible with the pump’s polypropylene/material.

Ductile Iron:

How do I maintain my Diaphragm Pump?

AODD pumps are comparatively easy to maintain. Importantly, and like every other pump, a regularly scheduled maintenance is crucial, to prevent mishaps before they happen. There are 4 main things to keep an eye on during the life of an AODD pump.

  1. The quality of the air used to operate the pump. Air can come in many different qualities with various amounts of water. Impurities are removed by an in-line air filter. Making sure that this is operating and doesn’t become clogged with debris from poor quality air is important to prevent these particles from reaching the pump and causing premature wear on the pump diaphragms.
  2. Examine the pump’s elastomers (diaphragms) routinely for signs of wear – replace these if necessary.
  3. Check the fluid inlet and outlet of your pump frequently. If either of these becomes clogged, it can lead to premature failure of the pump.
  4. Check the torque settings of the pump’s bolts, especially with pumps constructed of plastic, which can change shape over time, becoming compressed.