The Graco Husky 2150e pumps combine all of the benefits of a traditional air operated diaphragm pump like self priming, stalling under pressure and increased diaphragm life with the benefits of an electric pump like energy cost savings, reduced pulsation and increased pump control. Pulsation Comparison Chart Low pulsation operation delivers a smooth flow that is gentle on shear sensitive materials. The air charged drive reduces or eliminates pulsation without expensive pulsation dampeners or surge tanks. The energy efficient electric drive reduces energy consumption up to 80% compared to traditional air operated diaphragm pumps. Call us for any of your pump needs!!!