Pumps used onboard boats and ships to remove water from the bilge or to load or remove water for ballast.īorehole pumps to be installed into wells. Discharge pressure is maintained over the entire flow range of the pump. The pump uses two valves to control the flow of the liquid through the pump. During the other half of the rotation, the motion of the crank mechanism causes the bellows to expand, drawing liquid from the suction line into the bellows module. The rotation of a motor or compressing of the bellows causes the bellows to compress for one half of the rotation, causing the pump to dispense liquid into the discharge line. The bellows pump operates on the positive displacement principle. Used to express the rate at which mechanical energy is expended. Horsepower is the work done at the rate of 550 foot-pounds per second and it is equivalent to 745.7 watts. Horsepower (hp) is a unit in the foot-pound-second (fps) or English system. Size of the pump discharge or outlet connection. The maximum pressure the pump is designed to generate. Products returned as matches will meet all specified criteria. User may specify either, both, or neither of the "At Least" and "No More Than" values. The maximum flow the pump is designed to generate. This value is dependent on the system or pressure head the pump must enter.
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