Murzan PI-50 Double diaphragm pump

• Transferring fruit juices, concentrates, and other beverages.
• Pumping viscous food products such as tomato paste, ketchup, and purees.
• Handling dairy products including yogurt, cottage cheese, and liquid eggs.
• Moving shear-sensitive products or liquids with suspended solids without damage.
• Applications requiring hygienic transfer and easy Clean-In-Place (CIP) capabilities.

Typical flow rate

For this class of pump, flow rates commonly range from 100 to 500 litres per minute, depending on product viscosity and discharge pressure.

Inlet/Outlet size

Units of this type typically feature 3-inch (DN80) connections, suitable for high-volume transfer.

Operating pressure

Maximum operating pressures commonly found on units of this type are up to 7 bar (100 psi).

Power supply

These pumps are typically air-operated, requiring a compressed air supply, not electrical power.

Construction materials

Wetted parts are commonly constructed from hygienic materials such as 316L stainless steel and food-grade elastomers for diaphragms and valves.

Maintenance requirements

Double diaphragm pumps are known for relatively low maintenance, primarily involving periodic inspection and replacement of diaphragms and valve balls.

Suitable product characteristics

Ideal for products with high viscosity, shear sensitivity, and those containing soft suspended solids.

• What are the main advantages of a double diaphragm pump for food processing?

  Double diaphragm pumps offer gentle product handling, preventing damage to shear-sensitive materials and suspended solids. They are also easy to clean in place (CIP) and can handle a wide range of viscosities.

• Is this pump suitable for abrasive products?

• What kind of air supply is needed to operate this pump?

• Can this pump run dry without damage?

• What certifications are typically associated with pumps of this type for food use?

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.

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