
Diaphragm pump
A diaphragm pump is a positive displacement pump that uses a flexible diaphragm to transfer fluids. It operates without rotating parts in contact with the fluid, ensuring high safety and low contamination risk.
Key Features
• Leak-proof design: The diaphragm isolates the fluid from the pump' s driving mechanism, preventing leaks and cross-contamination.
• Versatile compatibility: Suitable for corrosive, viscous, or shear-sensitive fluids (e.g., chemicals, slurries, food ingredients).
• Self-priming ability: Can lift fluids from below the pump level without external priming, simplifying installation.
OBY- PP series/OBY eries/OBY2 serie


QBY1 Stainless Steel Series
Air-operated diaphragm pumps with durable 304 stainless-steel construction, offering strong corrosion and wear resistance for demanding chemical and industrial fluid-transfer applications.
QBY1-15
304 stainless-steel diaphragm pump · 22 L/min · 70 m head · 4 m suction lift
QBY1-25
304 stainless-steel diaphragm pump · 57 L/min · 70 m head · 4.5 m suction lift
QBY1-40
304 stainless-steel diaphragm pump · 378.5 L/min · 84 m head · 5.48 m suction lift
We supply air-operated diaphragm pumps in 304 stainless steel, aluminium alloy and polypropylene configurations for transferring corrosive, viscous, shear-sensitive and particle-containing fluids.
Diaphragm Pump Product Range
AIR-OPERATED DIAPHRAGM PUMPS
QBY2 Aluminium Series
Lightweight air-operated aluminium diaphragm pumps designed for easier installation and transport, suitable for applications involving coatings, oils, organic solvents and other compatible fluids.
QBY2-15
Aluminium diaphragm pump · 22 L/min · 70 m head · 4 m suction lift
QBY2-25
Aluminium diaphragm pump · 57 L/min · 70 m head · 4.5 m suction lift
QBY2-40
Aluminium diaphragm pump · 378.5 L/min · 84 m head · 5.48 m suction lift
QBY-PP Polypropylene Series
Lightweight polypropylene air-operated diaphragm pumps with reliable sealing, designed for transferring corrosive, hazardous and volatile compatible fluids.
QBY-15PP
Polypropylene diaphragm pump · 22 L/min · 70 m head · 4 m suction lift
QBY-25PP
Polypropylene diaphragm pump · 57 L/min · 70 m head · 4.5 m suction lift
QBY-40PP
Polypropylene diaphragm pump · 378.5 L/min · 84 m head · 5.48 m suction lift