STM Diaphragm Pump Air 25mm (1)
The STM DPA25090 is a 1-inch air-operated double diaphragm pump engineered for high-volume fluid transfer at low air pressure. With an aluminium pump body, nitrile membranes and a maximum flow rate of 90 LPM (24 GPM), it delivers consistent, reliable performance across a wide range of industrial fluid handling applications. The double diaphragm design uses air pressure differential to alternately create suction and positive fluid pressure, ensuring a steady, self-regulating flow that automatically stops cycling when line pressure is reached and resumes as demand requires.
Technical Specifications
| Model | DPA25090 |
| Inlet / Outlet | 1" |
| Air Inlet | 1/4" |
| Flow Rate | 24 GPM / 90 LPM |
| Max. Air Inlet/Outlet Pressure | 115 PSI / 8 BAR |
| Max. Diameter Solid | 1/8" |
| Pump Body Material | Aluminium |
| Membrane Material | Nitrile |
| Overall Width | 10.82" / 275mm |
| Overall Height | 13.22" / 336mm |
| Overall Depth | 8.0" / 203mm |
| Port Centre Height | 8.05" / 204.5mm |
| Foot Width | 5.90" / 150mm |
Features
| •High volume fluid delivery achievable even at low air pressure |
| •Air-operated double diaphragm design with ball check valves for positive, consistent fluid flow |
| •Self-regulating — builds and maintains line pressure, stops cycling when dispensing device is closed and resumes automatically on demand |
| •Aluminium pump body for lightweight durability in demanding industrial environments |
| •Nitrile diaphragms and O-rings suitable for a wide range of compatible fluids |
| •No lubrication required — only O-ring lubricant applied during assembly or repair |
| •Mounting feet with bolt holes for secure installation to prevent vibration damage |
Applications
| •Transfer of oils, lubricants and viscous fluids in industrial and workshop environments |
| •Pumping paints, solvents and coatings where a grounded, explosion-safe setup is maintained |
| •Chemical transfer in manufacturing and processing applications (verify fluid compatibility before use) |
| •General fluid handling in agricultural, mining and construction maintenance operations |
Air pressure must not exceed 115 PSI (8 BAR). Use a 50-micron or finer air filter on the supply line. Not compatible with III-Trichloroethane, Methylene Chloride or other halogenated hydrocarbon solvents. Always verify chemical compatibility of pump wetted parts with the fluid being pumped. Refer to the full instruction manual for safety precautions, operating instructions and maintenance requirements.
The information contained in this data sheet is based on data considered to be accurate. No warranty is expressed or implied regarding the accuracy of this data. Product specifications and availability are subject to change without notice. Lube Control Pty Ltd accepts no responsibility for any loss or damage arising from the use of this information.
Technical Documents
DPA25090 MANUAL
Download PDFDisclaimer
Technical specifications may change. Please confirm with the manufacturer.
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