15HP to 20HP Metal Lovejoy Coupling with Rubber 20HP A rotating screw model will

A rotating screw model will operate at lower pressures and higher CFM

Air-oil Separators

They include a poppet to maintain minimum pressure in the separator tank when the compressor is started and a check valve to prevent air backflow from the line

The oil sight glass for air compressor tends to be made of stainless steel or aluminum alloy that screws into the base of the pump or on the compressor sump tank

15HP to 20HP Metal Lovejoy Coupling with Rubber 20HP A rotating screw model willA flexible coupling connects two shafts, end to end in the same line, for two main purposes. The first is to transmit power (torque) from one shaft to the other, causing both to rotate in unison, at the same RPM. The second is to compensate for minor amounts of misalignment and random movement between the two shafts.