Refcomp SP4L1500 SP4L150E R22 Semi-Hermetic Compressor for Freezing Cold Room

Engineered with a Refcomp custom-designed dynamically balanced crankshaft with integral counterweights, this semi-hermetic compressor delivers exceptionally smooth, low-vibration running characteristics. High-strength piston linkages feature wear-resistant bronze bushings on the connecting rod wrist pins, dampening gas pressure pulsations and substantially extending mechanical service life during continuous low-temperature duty.

To prevent electrical winding damage caused by abnormal operating conditions, the semi-hermetic compressor is equipped with an INT6902 electronic motor protection module. The module actively monitors winding thermal status and power line stability, protecting the motor from phase loss, power supply imbalance, and thermal overload.

Featuring a high-rigidity body structure rated for working pressures up to 28 bar, the compressor incorporates streamlined internal suction gas channels to minimize pressure drop and flow losses. The compact casing design consolidates the suction filter, rotatable shut-off valves, and temperature sensor ports into a single footprint, saving installation space inside equipment skids.

Built with internal gas channels that pass cool returning suction gas directly across the motor housing, this semi-hermetic compressor maintains low motor operating temperatures under severe evaporating conditions. Supporting Part-Winding (PW) low-inrush starting, the custom motor is fully compatible with R22, R407C, R134a, R404A, and R507 refrigerants.

• Commercial Freezing Rooms & Cold Storage: Ideal for large supermarket cold rooms, walk-in freezers, and frozen distribution logistics.
• Blast Freezing & Fast Chilling Tunnels: Designed for quick-freezing equipment in poultry, meat, seafood, and bakery processing plants.
• Parallel Compressor Rack Systems: Well-suited for centralized multi-compressor supermarket racks requiring step capacity modulation.
• Industrial Low-Temperature Process Cooling: Suitable for pharmaceutical temperature control, chemical process chilling, and industrial fluid cooling.

Coolstart is a modern, large-scale refrigeration enterprise with over 20 years of industry experience. We specialize in supplying semi-hermetic compressors, scroll compressors, screw compressors, reciprocating compressors, rotary compressors, cold storage equipment, quick-freezing systems, and ice-making machinery. Supporting full-category OEM and ODM customization, Coolstart delivers reliable refrigeration products to clients across the United States, Russia, the United Kingdom, the United Arab Emirates, Saudi Arabia, and other global markets through technical innovation and dedicated service.

A1: High-load bronze bushings absorb reciprocating impact force at the piston pin, reducing pin friction and preventing metal galling under high differential compression ratios.

A2: The enlarged oil sump volume provides a stable oil reservoir during system transients and defrost cycles, ensuring consistent lubrication across multiple units in parallel rack configurations.

A3: Utilizing the Part-Winding (PW) starting configuration reduces the starting current to 88 A compared to 146 A in Direct-On-Line (DOL) mode, protecting electrical supply networks.

A4: Every unit undergoes 100% factory pressure testing, vacuum hold checks, mechanical running tests, and electrical insulation testing prior to packaging.

A5: We provide full export documentation packages, including Certificates of Origin (CO), CE compliance declarations, factory inspection reports, and commercial invoice sets.