Name: Two-Stage Industrial Screw Refrigeration Compressor (Model Series)
Brand: Blait
Rating: 5.0 (63 reviews)

Product Overview

Blait’s Two Stage Screw Refrigeration Compressor (YLG Series) is an energy-saving powerhouse designed for heavy-duty industrial cooling and freezing systems. Featuring a semi-hermetic structure, variable speed drive (VSD) technology, and dual cooling options (air-cooled/water-cooled), this screw compressor delivers exceptional efficiency, durability, and operational flexibility. With a power range of 4 kW to 355 kW and displacement of 0.8-1.2 m³/min, it caters to diverse industrial needs—from large-scale cold storage to high-demand freezing lines. The advanced YZ57 screw rotor profile minimizes energy loss, making it a cost-effective and eco-friendly choice for modern industrial facilities.

新产品推广白皮书(1)

R22

Region Ⅰ:Compressor operation requires the installation of liquid injection and oil cooling devices

Region Ⅱ:Compressor operation requires the installation of liquid injection or oil cooling devices

R404A/R507A

Region Ⅰ:Compressor operation requires the installation of liquid injection and oil cooling devices

Region Ⅱ:Compressor operation requires the installation of liquid injection or oil cooling devices

Adopting dual-stage coupled compression technology, the displacement ratio between the low-stage and high-stage reaches a precise 2.18:1. In low-temperature applications, efficiency is improved by more than 30% compared with single-stage screw compressors.

Core Features

High-Efficiency Screw Rotor Design

Adopting the patented YZ57 tooth profile (composed of arcs and higher-order curves), the compressor boasts a high area utilization coefficient (0.41 & 0.45) and reduced leakage triangle area, maximizing compression efficiency and minimizing energy waste.

Variable Speed Drive (VSD) Technology

Equipped with advanced VSD, the compressor automatically adjusts motor speed based on real-time air demand, reducing energy consumption by over 30% compared to fixed-speed models. This technology also extends the machine’s lifespan by reducing wear during startup and low-load operation.

Dual Cooling & Mobile Installation

Offering both air-cooling and water-cooling options, the compressor adapts to different industrial environments. Its mobile installation design allows flexible placement, simplifying on-site setup and maintenance.

Semi-Hermetic Structure & Oil-Free Operation

The semi-hermetic structure enhances durability and reduces refrigerant leakage, while the oil-free design ensures clean compressed air—ideal for industries with strict hygiene requirements. The 12-liter lubricant capacity and built-in oil flow monitoring system guarantee reliable lubrication.

Intelligent System Monitoring & Energy Recovery

A user-friendly control system enables real-time monitoring of temperature, pressure, and energy consumption, allowing operators to optimize settings and prevent downtime. The built-in energy recovery system captures up to 70% of waste energy from the oil circuit and motor, reusing it for heating or other industrial processes.

High-Pressure Resistance

Withstands pressure differences of up to 2.0 MPa, featuring a standard PTC110°C temperature sensor and INT69 FSY protection module for safe operation under extreme conditions.

Why Choose Blait

Blait is a leading provider of advanced screw compressors in China, with core advantages that set us apart:

Technological leadership in screw rotor design, developed through rigorous R&D and partnerships with industry experts.

ISO9001-certified manufacturing processes, using high-quality materials and precision machining to ensure product reliability.

Versatile product range (YLG20Z-84 ~ YLG30Z-118) to match specific cooling capacity and pressure requirements.

Energy recovery technology that cuts operational costs and supports sustainability goals.

Customizable OEM solutions and responsive technical support, tailored to your industrial needs.

Comprehensive testing with nationally accredited instruments, guaranteeing performance consistency and durability.

Capacity Control Mechanism Schematic Diagram

Oil Circuit Diagram of 2-Stage Screw Refrigeration Compressor

Oil Circulation Schematic Diagram

Electrical Connection

Key Applications

Large-Scale Cold Storage & Freezing Warehouses

Delivers consistent cooling for massive cold storage facilities, maintaining ultra-low temperatures for long-term preservation of goods.

Heavy-Duty Industrial Cooling

Supports manufacturing processes that require high-capacity cooling, such as chemical production, plastic molding, and metal processing.

Food Freezing Lines

Provides rapid and stable freezing for food processing plants, ensuring product quality and extending shelf life.

HVAC Systems for Industrial Facilities

Integrates with industrial HVAC systems to regulate temperature in large factories, warehouses, and commercial buildings.

Maintenance & Warranty

Maintenance Requirements

Monitor lubricant levels regularly and replace every 1,000 hours of operation.

Inspect the oil flow switch and cooling system monthly to ensure proper function.

Clean air/water cooling filters quarterly to prevent clogging and efficiency loss.

Check screw rotor alignment and seals annually for leakage or wear.

Warranty

Blait offers a 1-year warranty on the Two Stage Screw Refrigeration Compressor, covering defects in materials and workmanship. Our global service network provides on-site maintenance, spare parts supply, and technical consultation, ensuring your compressor operates at peak performance for years to come.