Semi-hermetic Two-Stage Screw Refrigeration Compressor Unit

Lynxcool, a trusted China supplier, presents the Semi-hermetic Two-Stage Screw Refrigeration Compressor Unit, engineered for superior quality and efficiency. The unit integrates dual-stage compression and a built-in economizer, improving energy efficiency by up to 12%. Compact skid-mounted design and PLC automation simplify installation, capacity adjustment, and remote monitoring.Ideal for supermarkets, food processing, cold storage, and pharmaceutical applications, it operates continuously with minimal maintenance. IP54 motor protection and multi-refrigerant compatibility ensure reliable performance, reduce leak risks, and extend service life, making it a robust choice for industrial and commercial refrigeration.

Key Advantages

The Semi-hermetic Two-Stage Screw Refrigeration Compressor Unit is designed to provide reliable, high-performance refrigeration for demanding industrial and commercial applications. Built with advanced engineering principles and manufactured in our ISO 9001-certified Chinese facility, it delivers exceptional efficiency, durability, and safety.

1. Semi-hermetic Structure

● Seal-free design eliminates the most common source of refrigerant leakage in traditional open compressors.

● Motor operates directly within the refrigerant environment, cooled by intake gas, protecting against moisture, dust, and impurities.

● IP54 protection rating ensures dust and water resistance for extended service life.

2. Integrated Dual-Stage Compression

● Distributes total pressure ratio across two stages, significantly reducing discharge temperatures and improving volumetric efficiency.

● Stable operation achievable at extremely low evaporation temperatures down to -50°C.

● Eliminates the need for complex interstage piping, simplifying system design.

3. Built-in Economizer Circuit

● Interstage flash gas injection increases refrigerant mass flow and improves energy efficiency.

● System COP can be improved by up to 12%, lowering operational costs.

4. Compact Skid-Mount Design

● All components, including the compressor, oil separator, and piping, are pre-installed on a single base.

● Minimizes on-site installation time and reduces plant room space requirements.

5. Advanced PLC Automation

● Fully automated control using Siemens/Delta PLC with touchscreen HMI.

● Supports automatic start/stop, capacity modulation, defrosting management, and remote monitoring via Modbus or BACnet.

6. Quality Assurance and Compliance

● Manufactured in an ISO 9001-certified factory, conforming to CE standards and GB/T national regulations.

● Standard refrigerant compatibility includes R134a, R404A, R507A, R22 (legacy), and R449A, ensuring global operational compatibility.

Technical Parameters

The Semi-hermetic Two-Stage Screw Refrigeration Compressor Unit’details are following:

Energy Efficiency and Operational Benefits

● Reduced Discharge Temperature: Two-stage compression lowers gas temperature, reducing thermal stress on equipment.

● Enhanced Volumetric Efficiency: Optimized compression stages improve overall refrigeration cycle performance.

● Built-in Economizer: Increases refrigerant mass flow, improving system COP by up to 12%.

● Semi-hermetic Design: Reduces refrigerant leaks and lowers maintenance frequency.

● Compact Skid Footprint: Saves space in plant rooms and supports easy retrofits or expansions.

This combination of design features ensures energy efficiency, long-term reliability, and operational safety, giving customers measurable cost savings over the equipment lifecycle.

Installation and Maintenance Guidelines

Installation:

● Pre-assembled skid allows rapid integration into existing systems.

● Requires minimal on-site piping adjustments and electrical connections.

● Compact design suits both new constructions and retrofit projects.

Maintenance:

● Semi-hermetic motor design minimizes contamination and protects against moisture.

● Routine checks focus on refrigerant charge, oil level, and PLC diagnostics.

● Spare parts are globally available, reducing downtime for maintenance tasks.

Why Choose Lynxcool?

1. 20 Years of Industry Experience: Over 20 years of experience in industrial refrigeration, accumulating rich installation expertise and continuously optimizing units manufactured in China.

2. Customized Engineering Support: Providing heat load calculations, selection reports, drawings, and equipment lists based on customer needs.

3. Factory Pre-assembly and Testing: All units are assembled in our Chinese factory and undergo rigorous acceptance testing to ensure stable operation.

4. Standardized and Easy-to-Maintain Components: Using components from well-known brands, with ample global spare parts availability, eliminating the need for specialized tools for on-site replacements.

5. Global After-Sales Network: Global service partners ensure spare parts delivery within 48 hours and provide remote diagnostic support.

6. Certification Guarantee: Certified by ISO 9001, CE, PED, etc., with optional UL certification for the North American market.