Open-type Two-stage Screw Refrigeration Compressor Unit

A leading China factory and supplier Lynxcool offers the Open-type Two-stage Screw Refrigeration Compressor Unit designed for industrial ultra-low temperature applications. It combines precision-forged steel rotors, advanced interstage cooling, and independent Vi capacity regulation to deliver reliable performance down to -65℃.Built with high-grade ductile iron casings, high-precision bearings, and integrated oil management, this unit provides long-lasting durability, minimal maintenance, and superior energy efficiency. Ideal for IQF tunnels, pharmaceutical freeze-drying, marine deep-freezing, and specialized cold storage, it ensures high COP, robust operation, and flexible adaptation to demanding refrigeration tasks.

Key Features

1.Optimized Two-stage Compression

The Open-type Two-stage Screw Refrigeration Compressor Unit utilizes a low-pressure (LP) booster and a high-pressure (HP) stage operating in series. This configuration allows it to achieve extremely high compression ratios while maintaining low discharge temperatures, enabling stable operation even at evaporating temperatures as low as -65℃. The dual-stage system improves efficiency and maximizes the Coefficient of Performance (COP), making it ideal for deep-freezing applications.

2.High-Efficiency “i” Profile Rotors

Both LP and HP stages feature advanced 5+7 lobe rotors, enhancing gas displacement while minimizing internal leakage. Precision-forged steel construction ensures exceptional strength, allowing the unit to handle heavy-duty industrial cycles with minimal wear. Each rotor is machined with micron-level accuracy, delivering optimal performance and reliability under continuous operation.

3.Interstage Cooling System

An integrated interstage cooler (plate or shell-and-tube design) efficiently reduces the temperature of the gas discharged from the LP stage. This not only enhances the overall cycle efficiency but also extends the lifespan of the equipment by preventing excessive thermal stress on the high-pressure stage.

4.Smart Vi and Capacity Control

The unit provides independent Vi adjustment and 10%–100% stepless capacity regulation for both stages. This enables precise load matching and reduces energy consumption, ensuring that the compressor adapts efficiently to fluctuating demands without compromising performance.

5.Advanced Lubrication Management

A fully integrated oil management system with high-efficiency separators minimizes oil carry-over while maintaining optimal cooling of the rotors. This reduces maintenance frequency and ensures consistent operation, particularly under extreme cooling conditions.

6.Durable Build and Components

Constructed with high-grade ductile iron casings and high-precision rolling bearings, the unit is designed for a service life exceeding 100,000 hours. The robust construction supports heavy-duty industrial usage while minimizing downtime.

Product Parameters

Applications

The Open-type Two-stage Screw Refrigeration Compressor Unit is engineered for extreme refrigeration environments:

1.Food Industry

Deep-Freezing & Blast Freezing: Ideal for IQF tunnels handling seafood, poultry, and prepared foods, maintaining product quality during rapid freezing.

Ultra-Low Temperature Cold Storage: Suitable for tuna storage, frozen meat, and specialty food repositories requiring precise temperature control.

2.Pharmaceutical Industry

Supports freeze-drying processes, low-temperature synthesis reactions, and storage of sensitive materials requiring strict thermal conditions.

3.Marine and Offshore

Specialized configurations enable rapid freezing on fishing vessels and processing ships, ensuring product freshness even in challenging marine environments.

4.Chemical Industry

Maintains stability for chemical processing requiring sub-zero temperatures, including cryogenic reactions and specialized cold storage.

Installation and Turnkey Support

Lynxcool offers a structured six-step solution for installation and maintenance of the Open-type Two-stage Screw Refrigeration Compressor Unit:

1.System Design: Detailed technical proposals, P&ID diagrams, and tailored layouts.

2.Equipment Manufacturing: Custom fabrication of core components, including condensing units, evaporators, and pipe coils.

3.Valve and Component Selection: Accurate determination of valves, controllers, and accessories for optimal performance.

4.Material Procurement: Comprehensive sourcing of piping, insulation, foaming materials, and cold room panels.

5.Installation and Commissioning: On-site assembly, rigorous testing, and startup to ensure immediate operational readiness.

6.After-Sales Support: Rapid-response technical assistance and preventive maintenance programs for long-term reliability.