English to Polish Tech/Engineering Mechanics / Mech Engineering cooling system

The noise issue who afflicted these two unit, was related to the vibration generate by the pulsation of the compressor transmitted through the economiser port to the economiser pipe. This issue was stronger when the economiser was deactivated and there wasn’t a sensible delta P presence between the two part of the economizer port.

Jest to treść z karty serwisowej po wizji lokalnej.

Sensible = jawna?
delta P = zmiana ciśnienia?

Serdecznie proszę o pomoc.