Warning!Can not use for corrosive liquid.FeatureAir-operated double diaphragm pumpWith 1 inch inlet and outlet1/2 Inch air inlet1/8 Inch max diameter suspended solidsPerfect for use with waterIdeal for use with low viscosity petroleum fluidsSolid constructionTwo years warranty SpecificationsProduct: Diaphragm pumpType: Air-operated double diaphragmModel: QBK-25LInlet Port: 1 inch (25 mm)Outlet Port: 1 inch (25 mm)Air Inlet Size: NPT 1/2 inch (12.7 mm)Average Air Consumption: 9 CFMMax Flow rate: 6 m3/h (24 GPM)Suction: 0-5 m (0-16.4 ft)Max Suspended Solids: 3 mm (1/8 inch)Max Head: 69 m (226.38 ft)Max. PSI: 115Operating PSI: 29-115Max Fluid Temp.: 80 ℉Product Dimension: 35 x 23 x 46 cm (14 x 9 x 18 inch)Package Size: 38 x 28 x 49 cm (14.96 x 11.02 x 19.29 inch)Gross Weight: 16 kg (35.27 lbs)ApplicationPerfect for use with water. Ideal for use with low viscosity petroleum fluids including diesel, kerosene, motor oil and some waste oil.Working PrincipleIn the pump two symmetrical working chamber each equipped with a diaphragm, the center link will be integrated into one. Compressed air from the pump inlet into the valve, through the valve body to introduce compressed air into one of the chamber to promote movement of the diaphragm chamber, while the other chamber gas emissions. Once the end of the stroke is reached, the gas distribution mechanism automatically introduces compressed air into the other working chamber to push the diaphragm in the opposite direction so that the two diaphragms move back and forth in unison.Package Content1 x Air-Operated Double Diaphragm Pump1 x Product Manual