Sandpiper double diaphragm pump

• Transferring abrasive slurries and viscous fluids in chemical processing.
• Handling shear-sensitive materials in food and beverage production.
• Pumping corrosive chemicals in wastewater treatment facilities.
• Dewatering applications in mining and construction.
• Dispensing inks and coatings in printing and finishing operations.

Typical capacity

For this class of equipment, flow rates typically range from 20 to 1000 litres per minute, depending on model and air supply.

Power supply

Air-operated double diaphragm pumps (AODD) are powered by compressed air, typically requiring a supply pressure of 2 to 7 bar.

Diaphragm materials

Commonly found diaphragm materials include Santoprene, PTFE, Buna-N, and Viton, selected based on fluid compatibility.

Inlet/outlet port sizes

Typically, port sizes range from 1/2 inch to 3 inches, influencing flow capacity and compatibility with existing pipework.

Maximum solid handling

Units of this type can typically handle solids up to 10-15mm in diameter, depending on the pump's design.

Construction material

Pump wetted parts are commonly available in polypropylene, aluminium, or stainless steel, suitable for various chemical resistances.

Mounting

This unit is supplied on a stainless mobile stand, offering flexibility for relocation within a facility.

• What are the main advantages of an AODD pump?

  AODD pumps are self-priming, can run dry without damage, are explosion-proof due to air operation, and can handle a wide range of fluid viscosities and solids.

• Is this pump suitable for food-grade applications?

• What maintenance is typically required for a used AODD pump?

• Can this pump handle abrasive fluids?

• What air supply considerations are important?

Diaphragm pumps are generally valued for their reliability and versatility across laboratory and pharmaceutical applications. Buyers typically prioritise condition of the diaphragm itself, seals and valve integrity when purchasing used units. Industry sentiment favours their gentle handling of sensitive fluids, low maintenance requirements and ability to manage viscous or abrasive media. Common strengths include self-priming capability, compact design and suitability for both suction and discharge applications. Durability remains a key selling point.

General overview for this equipment type