دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a rotary pump that moves fluid by means of two contrarotating, meshing gear wheels. The teeth of one wheel mesh with the spaces between the teeth of the other wheel. The fluid enters one side of the pump, is forced through by the moving gears, and is discharged on the other side.

n: a reciprocating or a rotary pump that moves a measured quantity of liquid with each stroke of a piston or each revolution of vanes or gears. positive-pressure self-contained breathing apparatus (SCBA) n: a face mask and portable air tank used for the purpose of breathing in contaminated atmospheres.

n: a device that increases the pressure on a fluid or raises it to a higher level. Various types of pumps include the bottom- hole pump, centrifugal pump, hydraulic pump, jet pump, mud pump, reciprocating pump, rotary pump, sucker rod pump, and submersible pump.

n: a pump that moves fluid by positive displacement, using a system of rotating vanes, gears, or lobes. The vaned pump has vanes extending radially from a rotating element mounted in the casing. The geared rotary pump uses oppositely rotating meshing gears or lobes.