displacement device, помогите перевести tech.

[Ilya_Ko]

Such displacement pumps are generally used in pump and/or compressor systems for pumping or displacing aggressive and/or abrasive media such as particulate slurries, or some corrosive liquids or gases which may be at high temperature or under high pressure.
In one embodiment of a known displacement device, a certain amount of medium to be displaced is carried into the pump chamber via the inlet side (and from the pipe system) during the suction stroke of the displacement element, and this same amount of medium is displaced (or forced) out of the pump chamber via the outlet side during the displacement stroke of the displacement element.

displacement device?
displacement element?
the suction stroke of the displacement element?
displacement stroke of the displacement element?

Заранее спасибо

[ALEXN]

по-моему речь идет о поршневых насосах: забор жидкости при заходе поршня в цилиндр (suction stroke) и выброс (forced) жидкости при обратном ходе поршня (цикл выталкивания - displacement out of the pump chamber) через сливное отверстие/в напорную линию.
displacement device = может быть насос
displacement element = поршень со штоком
suction stroke = ход (цикла) всасывания (забор жидкости при входе поршня)
displacement stroke = ход (цикла) выталкивания