No suction or discharge valves provide smooth, quiet, vibration-free operation.

Low-clearance screw design for lower oil-circulation rates.

Ideal for variable-speed applications.

Precision long-life bearings.

Capacity control.

Economizer-cooled motor provides high-efficiency operation.

Uses O-ring seals.

Compatible with many different refrigerant/oil combinations.

Internal discharge check valve.

No oil pump.

Two-step Vi for low-temperature models to maximize efficiency over a wide operating range.