Product Description Product Description eccentric drive mechanism, compact, small installation space. Unique worm structure, mechanical drive components ensure continuous, smooth. Features and Benefits hydraulically driven diaphragm, diaphragm and longer life Built-in adjustable pressure relief valve diaphragm and pump head assembly automatic protection against overpressure damage to a variety of materials and structural options at the bottom of the worm pump Tapered roller bearings ensure high load transmission Under the long-term stable operation and stable accuracy ± 1% (10% -100% turndown) at the pump is running or stopped state can regulate the flow of the application of sewage wastewater treatment, petroleum, chemical, power plants, desalination reverse osmosis systems, natural gas, pharmaceuticals, paper, food, lab technicians parameters Flow: 2L / h ~ 659L / h maximum discharge pressure of 211bar power: 0.25kW ~ 1.5kW suction lifting height of up to three meters of water Frequency: 50Hz / 60Hz pump if there are other questions, you can also Contact us (http://www.cnpumpcn.com) will be happy to serve you, Mobile: 18925478337 Thank you!