The Refcomp SW3L-18000 is a 180HP (135kW) industrial AC screw compressor engineered for large cold room and process cooling applications. It combines flexible capacity regulation, integrated pressure safety protection, high-precision suction filtration, and flexible piping connections to deliver dependable performance in demanding refrigeration systems.
The SW3L-18000 offers stepped or stepless slide-valve capacity control configurations. Adjusting compressor output to changing cooling demand improves load matching and reduces unnecessary full-capacity operation.
A built-in safety valve connects the high- and low-pressure sides to help protect against excessive internal pressure differences. Its controlled opening and reliable reseating provide an additional safeguard against abnormal pressure conditions.
The integrated 100 μm suction filter captures impurities from incoming refrigerant gas before they reach the motor. This reduces internal contamination and protects critical components from damage caused by foreign particles.
The 360° rotatable suction and discharge shut-off valves allow flexible piping orientation, simplifying installation in different equipment layouts. An integrated discharge check valve also helps prevent refrigerant backflow during shutdown.
| Model | SW3L-18000 |
|---|---|
| Rated Power | 180HP / 135KW |
| Displacement (50/60Hz) | 562 / 674 m³/hr |
| Weight | 1030 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 | 453 / 1333 A |
| Max Operating Current | 250 A |
Q1: Can the SW3L-18000 be used in an air-conditioning system?
The SW3L series is primarily designed for low-temperature refrigeration and process cooling. Before selecting this model as an AC screw compressor, verify that the required refrigerant, cooling capacity, and operating temperatures fall within its approved operating range.
Q2: What should I consider when replacing an existing compressor?
For an air conditioning screw compressor replacement, compare the required operating range, mounting dimensions, suction and discharge connections, oil-line fittings, and controller compatibility. These checks help identify potential installation and system-matching issues before replacement.
Q3: Does the SW3L-18000 require an external oil separator?
Yes. The SW3L series does not include an integrated oil separator, so a properly matched external oil separation and return system is required. For a screw compressor used in process cooling, verify oil filtration, flow monitoring, and piping connections against the manufacturer's installation requirements.
Q4: What electrical checks are necessary before commissioning?
Before starting this 180 HP screw compressor, verify the motor power supply, star-delta starter wiring, phase sequence, and INT69 SNY protection connections. Proper electrical configuration helps prevent startup faults and supports reliable operation of the AC screw compressor.
