In manufacturing industries that require absolutely clean compressed air, even a tiny amount of oil can cause product contamination and equipment damage. Kobelco oil-free air compressors – Emeraude FE series 22–55 kW specifically designed to provide high performance, operates stably 24/7 with optimal life cycle cost, is a reliable choice for food, pharmaceuticals, electronics, and high-tech industries.

With over 100 years of research and development, the Kobelco Group of Japan has introduced the most optimal products with 37kW Kobelco air compressor system Oil-free Emeraude FE series according to TUV standards of Germany & ISO 8573-1 Class 0 compressed air standard produces 100% clean, oil-free compressed air.

Overview of the Emeraude FE Series

Kobelco screw air compressor is a leading Japanese brand in the field. oil-free screw air compressor, famous for durability, precision, and stringent quality standards.
The single-stage Emeraude FE focus on stable performance, long-term reliability with absolutely clean air, suitable for continuously operating central compressed air systems.

Power range: 22 – 55 kW
Application orientation: clean air – 24/7 operation – high standards.

Why choose the Kobelco Emeraude FE oil-free air compressor?

In a sensitive manufacturing environment:

• Gas mixed with oil → the gas stream and contaminate the product.
• Oil accumulates → Damage to valves, cylinders, and sensors
• Complex maintenance → Complex maintenance

Emeraude FE the problem was completely solved thanks to:

• No oil in the compressor chamber.
• The output air is absolutely clean.
• High stability during continuous operation.

Save energy with dual-stage compression technology.

• Low overall power consumption
• High performance thanks to two-stage compression.
• Absolutely clean compressed air quality.

Outstanding performance

Technology two-stage compression The Emeraude FE line delivers performance. higher, ranging from 8% to 28%. compared to conventional single-stage oil-free screw compressors.

Why save energy?

• The compressed air after the first stage is cooled by an intermediate heat exchanger before entering the second stage → reducing the required compression power.
• Reduced gas leakage in each compression chamber thanks to a lower compression ratio at each stage.

Result: Low power consumption – optimal operating efficiency.

Smart LCD controller – Easy to operate

The multi-function LCD screen allows for:

• Monitor the entire operational status.
• Adjust the discharge pressure.
• Record operational data.
• Display graphics, daily/weekly reports
• Automatic operation timer

Besides:

• Supports data export via Modbus (optional)
• The control panel is waterproof IP65

Reliability has been confirmed

• Dual vent design Prevents oil from entering the compression chamber → ensures compressed air absolutely oil-free
• Gamma Profile Rotor and Compression Casing designed using advanced FEM analysis → increased durability and stability
• Second stage compressor head coating MoS₂ and stainless steel → Superior corrosion resistance
• Continuous and stable operation in the environment 40°C ±5°C

Specifications

Kobelco air compressor line inverter / Air-cooled series

Inverter / Air cooled model
Model	Max. Discharge Pressure	Free Air Delivery		Main motor	Discharge Connection	Dimensions	Noise Level	Voltage	Weight	Cooling fan motor	Initial lubricant
		(50/60Hz)				WxDxH
	MPa	m3/min	cfm	kW		mm	dB(A)		kg	kW	L
FE37AV	0.75	5.4	191	37	40A (R1·1/2)	1,650 x 1,100 x 1,500	68	380 - 415	1,035	2.2	13
FE55AV	0.75	8.1	286	55		1,950 x 1,200 x 1,500	67		1,440

Kobelco air compressor line without inverter/Air-cooled line

Fixed Speed / Air cooled model
Model	Max. Discharge Pressure	Free Air Delivery		Main motor	Discharge Connection	Dimensions	Noise Level	Voltage	Weight	Cooling fan motor	Initial lubricant
		50Hz				W x D x H
	MPa	m³/min	cfm	kW		mm	dB(A)	V	kg	kW	L
FE22A	0.75	3.8	134	22	25A (R1)	1,650 x 900 x 1,500	64	380-415	905	2.2	11
FE22A-H	0.86	3	106
FE30A	0.75	4.8	170	30	40A (R1-1/2)	1,650 x 1,100 x 1,500	67		1,016	3	13
FE30A-H	0.86	4.2	148
FE37A	0.75	5.8	205	37			68		1,030
FE37A-H	0.86	5.1	180
FE45A	0.75	6.9	244	45		1,950 x 1,200 x 1,500	65		1,325
FE45A-H	0.86	6.3	222				66
FE55A	0.75	8.1	286	55			67		1,415
FE55A-H	0.86	7.5	265				68

• For fixed-speed lines, the starting system uses star-delta circuit.
• Standard intake air conditions:
  Absolute suction pressure 0.10 MPa – Suction temperature 20°C – Humidity 0% RH.
• The exhaust gas flow rate is converted to standard intake air conditions.
• The discharge pressure is measured at the location after the air cooler.
• Noise levels were measured in an anechoic chamber, at a distance from the front of the machine. 1,5 m and tall 1 m compared to the floor, when the machine is operating at full load.
• Compressed air is generated. not to be used directly for respiratory purposes unless it has gone through a specialized processing system
• Nominal working pressure:
  • With a design pressure of 0.75 MPa → actual operating pressure: 0,70 MPa
  • With a design pressure of 0.86 MPa → actual operating pressure: 0,80 MPa
• The cooling system is dependent on ambient conditions. Therefore, good ventilation is necessary to maintain the temperature of the machine room. Not exceeding 40°C.
• Using Genuine KOBELCO lubricating oil as recommended by the manufacturer.
• Specifications and designs are subject to change without prior notice.

Japanese standard oil-free screw drive technology

Emeraude FE uses oil-free screw assembly precisely machined:

• Avoid metal-to-metal contact.
• Reduce friction and heat generation.
• Maintaining stable performance over the long term.
• Increase compressor head lifespan

This design helps the machine durable, low maintenance with maintain stable air quality throughout its life cycle.

Principle of operation

• Air compressor screw
• Air compressor screw no oil used
• Clean compressed air is cooled and then delivered to the system.
• No complex oil separation is required.

→ Clean air – simple process – high efficiency

Key advantages of Kobelco Emeraude FE

• Absolutely clean compressed air – oil-free.
• Operates reliably 24/7
• High durability and reliability
• Low maintenance costs
• Meets stringent industry standards.
• Reduce the risk of product contamination.

Practical applications

Emeraude FE is effectively deployed in:

• Food & Beverage Industry
• Pharmaceuticals – healthcare
• Electronics, semiconductors
• Sản xuất công nghệ cao

The operations engineer highly appreciated it stability, air quality, and continuous operation capability of the FE series in a high-standard production environment.

carried out maintenance and oil sludge (varnish) removal for – Screw air compressors Kobelco screw air compressor