Unibloc AODD Pumps

The Unibloc Hygienic Technologies family includes Flotronic air-operated double-diaphragm pumps for hygienic and industrial transfer. Applications include ingredients, viscous products, and compatible chemicals requiring appropriate fluid-contact materials.

Compressed air alternately moves two diaphragms. Check valves direct liquid into and out of the pumping chambers, creating a repeating suction-and-discharge cycle without a conventional rotating shaft seal.

Flotronic's One-Nut design simplifies access to the diaphragm assembly for servicing. It is a specific product feature; confirm the maintenance procedure and construction of the proposed pump.

An AODD pump uses reciprocating diaphragms powered by air. A rotary lobe pump uses rotating elements and typically an electric drive, with different flow characteristics, controls, and maintenance needs.

Suitable configurations can handle viscous products, but suction conditions are critical. Provide viscosity at operating temperature, inlet piping dimensions, required flow, and how the supply vessel feeds the pump.

Solids capability depends on valve clearances, particle characteristics, and the chosen design. Identify soft pieces, fibers, or abrasive particles separately when selecting a pump for a solids-containing product.

Flotronic offers sanitary configurations within the Unibloc Hygienic Technologies portfolio. Confirm the exact certification, materials, surface finish, connections, and cleaning requirements for the model being supplied.

Selected configurations support clean-in-place operation. The cleaning flow, chemistry, temperature, drainage, and valve arrangement must suit the installed pump and be validated for the actual process.

Use the manufacturer's air-consumption data at the required liquid flow and discharge pressure. Include air-line losses and available compressor capacity rather than selecting only by the pump's air connection.

Air pressure and available air volume influence pump output, along with liquid-side resistance. A regulator can help control operation, but flow should be verified under actual process conditions.

Each diaphragm stroke discharges a portion of liquid. Where smoother delivery is required, evaluate compatible pulsation control and piping arrangements rather than assuming the pump produces continuous, pulse-free flow.

Dry-running capability depends on the selected model and duty conditions. Confirm the manufacturer's limits and consider diaphragm life, air consumption, and process requirements before allowing extended dry operation.

Check compatibility with the process liquid and cleaning chemicals at their actual concentrations and temperatures. Flex life, product requirements, and operating pressure also influence the appropriate diaphragm material.

Inspect diaphragms, check valves, seals, and air-system components according to the model's manual. Track changes in flow and air consumption, and verify cleaning performance after servicing hygienic equipment.

Integration requires matching liquid connections, air supply, controls, supports, and cleaning requirements. Review the complete installation, especially where replacing an electrically driven pump changes utilities and flow behavior.

Contact Industrial Air Services at (615) 641-3100 with product properties, flow, pressure, available compressed air, and sanitation requirements to discuss a suitable pump and configuration.