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Main features: 1, advanced pump structure - pump body, double chamber, double diaphragm, double acting, small size, high efficiency. 2, long diaphragm life. 3, rubber duckbill valve to replace the traditional free-fall ball valve - valve closing speed. 4, suitable for conveying particles containing large proportion of larger viscosity medium. Through the particle diameter without blocking. 5, the pump body to enhance polypropylene, strong corrosion resistance. 6, without liquid, self-priming capacity of up to five meters (depending on specifications and speed may be), suitable for barrel, sweep warehouse. Car pump more convenient to move. 7, metering diaphragm metering accuracy error of less than 1.5%. 8, no seal, simple structure, easy maintenance.