Hale’s ESP priming system provides the ultimate in fast priming, high vacuum performance and reliability without the use of a lubricant. Technologically advanced and environmentally safe, the Model ESP is self lubricating. There is no oil tank to check and refill, no oil is expelled to the ground. The ESP is a semiautomatic priming system with a single action control valve which simultaneously activates the entire system ensuring fast consistent air evacuation. Hale’s electric rotary vane-type positive displacement primer is available with 12-volt or 24-volt DC power.