The Refcomp SW3L-4000 is a 40HP (30kW) semi-hermetic screw compressor engineered for commercial air-conditioning and refrigeration applications. It combines an optimized asymmetric rotor profile, a compact integrated housing, and high-precision suction filtration to deliver efficient, stable, and low-vibration compression performance.
The SW3L-4000 AC screw compressor uses RefComp's asymmetric 5/6-tooth rotor profile for smooth rotor engagement and reduced vibration. Its optimized geometry helps improve compression efficiency while supporting quieter, more stable mechanical operation.
This RefComp screw compressor features optimized internal gas passages that help reduce suction resistance and flow losses. The compact housing integrates key components, simplifying equipment layout and making system installation more convenient.
The semi-hermetic screw compressor includes a built-in 100 μm suction filter that captures impurities from incoming refrigerant gas before they reach the motor. This helps protect internal components from contamination and reduces the risk of damage caused by foreign particles.
The suction and discharge shut-off valves can rotate through 360°, allowing flexible pipe routing in different equipment layouts. An integrated discharge check valve helps prevent refrigerant backflow during shutdown, providing additional system protection.
| Model | SW3L-4000 |
|---|---|
| Rated power | 40HP / 30KW |
| Displacement 50/60Hz | 150 / 180 m³/hr |
| Weight | 255 KG |
| Capacity Regulation | 25%, 50%, 75%, 100% 4-step; 25%–100% stepless |
| Standard Motor | Y/△ – 400V/3/50Hz – 460V/3/60Hz |
| Star/Delta Start Current | 131 / 398 A |
| Max operating current | 80 A |
When evaluating the SW3L-4000 as an AC screw compressor, confirm that its approved operating range matches the required refrigerant and evaporating and condensing temperatures. The SW3L series is primarily intended for low-temperature refrigeration and process cooling, so application compatibility should be verified before selection.
The SW3L-4000 uses partial-winding motor starting, which helps manage starting current. Verify that the power supply, starter wiring, phase sequence and INT69 SNY protection circuit match the manufacturer's electrical specifications before operation.
As a low-temperature screw compressor without an integrated oil separator, the SW3L-4000 requires a properly matched external oil separation and return arrangement. Check the oil circuit, filtration and flow-protection devices according to the installation documentation to support reliable lubrication.
When replacing an AC screw compressor, compare the required cooling duty, approved operating range, mounting dimensions, piping connections and controller compatibility. These checks help avoid installation difficulties and ensure the replacement is correctly matched to the system.
