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Oil-free Fixed Speed Screw Air Compressor

Working Pressure	2-10[bar]	29-145[psig]
Working Air Capacity	5.3-80[m³/min]	187-2825[cfm]
Working Power	37-500 [kW]	50-670[hp]

Systematic Modular Structure Design

Overall Design Concept
Higher efficiency, easier maintenance, and simplified components.
The system integrates a two-stage air end, transmission gear set, and lubrication system, occupying less space.

High-Efficiency Air Intake System

High-efficiency intake filter with a filtration efficiency of 99.99%.
Integrated intake control and relief valve, compact in structure and responsive, ensuring safety and reliability.

Hot-Cold Zone Separation Design

External cool air is drawn in from the side, and hot air is discharged from the top.

The internal space is rationally divided into radiant heat zones and low-temperature zones.

Gas-Liquid Separator & Non-Air-Loss Automatic Drain

Aluminum alloy gas-liquid separator and 304 stainless steel air pipelines feature excellent corrosion resistance, resisting long-term erosion by water vapor and corrosive media in compressed air to ensure component stability and service life.
Zero air-loss automatic drain valve with liquid level alarm ensures no condensate residue in the system; drainage is controlled automatically by a liquid level sensor or manually via a valve.

Independent Oil Pump System

Pre-lubrication before startup forms a complete oil film on bearings, gears, and other key components before operation, eliminating dry friction risks.
Delayed operation of the oil pump after shutdown provides continuous cooling and lubrication, reducing thermal shock wear.

Patented Screw Rotor Profile

Adopts a patented screw rotor profile to achieve minimal clearance between rotors, significantly improving volumetric efficiency and energy performance.
With a length-to-diameter ratio of less than 1.5, the screw has higher rigidity and maintains stable geometric accuracy even under high-speed rotation and high-pressure working conditions, ensuring long-term reliable operation.

Composite Coating

High-temperature resistance: Stable in up to 270°C environments.
Impact and wear resistance: Strong bonding strength between the coating and substrate, excellent resistance to airflow impact and particle collision, not easy to peel off, significantly extending the service life of rotors and housings.
Corrosion and water resistance: Strong resistance to water vapor in compressed air, eliminating rust risks and ensuring the purity of compressed air.

Multiple Seals for 100% Oil-Free Operation

Dual-chamber vent design eliminates the risk of oil-air cross-contamination.
Vacuum suction system maintains a slight vacuum in the gearbox at all times.
100% absolutely oil-free compression, compliant with ISO 8573-1, Class 0.

Oil-free Fixed Speed Screw Air Compressor

Oil-free screw air compressors compress air through two screw rotors and then remove moisture from the compressed air through a water-gas separator. At the same time, because there is no oil injection for cooling, the compressed air is usually cooled, equipped with pre-coolers, intercoolers, and aftercoolers, to meet the requirements of the outlet temperature. High-performance shaft seals on the rotor shaft prevent lubricating oil from leaking into the compressed air, achieving oil-free operation. UNITED oil-free variable speed screw air compressors can change the power frequency, adjust the load, and reduce power consumption. The frequency converter is at its core, changing the motor's operating speed through the conversion of industrial frequency.

mail@sunc.cn

021-69176699

Category：

Dry Oil-Free Screw Air Compressor

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