Qdm Pneumatic Single Diaphragm Pump

Air-driven single-diaphragm (control) pump engineered for reliable transfer and circulation of inks and a wide range of industrial liquids. The pump uses compressed air as its power source and operates as a positive-displacement diaphragm actuator with associated valves, delivering dependable, spark-free pumping for viscous, corrosive, volatile or toxic liquids and liquids containing small solid particles.

Key features

• Pneumatic power: no electrical spark or electromagnetic interference, suitable for use in flammable or explosive environments.
• Positive-displacement diaphragm design: handles water-based inks, oil, slurry, corrosive liquids and fluids with small solids.
• Adjustable flow: output is regulated simply by changing air-source pressure or fine-tuning the inlet needle valve to match viscosity and process requirements.
• Return-ink handle: built-in return mechanism lets residual medium in the pump and lines be returned automatically to the supply container after operation (press both handles to activate; pull handle out before restarting).
• Robust, serviceable construction: designed for straightforward operation, cleaning and maintenance.
• Corrosion options: special anti-corrosion diaphragm plates are available for aggressive media.

Typical applications

• Printing industry: water-based ink systems, gravure and flexo printing presses, surface ink lift and circulation systems.
• General industrial fluids handling: transfer and circulation of water, oils, slurries, chemically aggressive liquids and other viscous or particulate-containing fluids.

Benefits for B2B users

• Improved safety in hazardous-area installations due to air-driven, non-electrical operation.
• Flexible flow control to suit different fluids and process rates.
• Reduced material waste and faster cleaning with the integrated return function.
• Field-upgradable diaphragm materials for extended service life with corrosive media.

For specification matching, confirm air inlet pressure range, maximum particle size allowance and diaphragm material options with the supplier or datasheet to ensure compatibility with your fluid and process conditions.