How much energy can a PM VFD screw air compressor save?

On sites with fluctuating air demand, permanent magnet variable frequency compressors typically save 20% to 40% of electricity compared with fixed-speed load/unload machines, because motor speed follows actual consumption instead of idling. Savings depend on the demand profile, so we recommend a load profile review before sizing.

When should I choose an oil-free screw air compressor?

Choose oil-free when compressed air touches the product or process, for example in food and beverage, pharmaceuticals, electronics, textiles and painting. Oil-free dry type and water-lubricated designs deliver Class 0 air per ISO 8573-1 and remove the risk of oil carry-over contamination.

What information is needed to size an industrial air compressor?

Provide required free air delivery in m3/min or CFM, working pressure in bar or MPa, daily running hours and demand variation, required air quality class, supply voltage and frequency, cooling preference, ambient temperature and site altitude.

Does Honest Compressor offer OEM and ODM customization?

Yes. We supply OEM and ODM air compressors with custom voltage such as 380V, 400V or 415V, controller language, enclosure color, branding and integrated configurations combining compressor, air tank, dryer and filters.

What is the benefit of a two-stage screw air compressor?

Two-stage compression splits the pressure ratio between two rotor sets with inter-stage cooling. This lowers compression temperature and internal leakage, giving higher specific efficiency than single-stage units, especially for large flows and continuous duty.

China Oil-Free Water Lubricated Screw Air Compressor EOWV-45A/W Suppliers, Exporter

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China Oil-Free Water Lubricated Screw Air Compressor EOWV-45A/W Suppliers, Exporter

Class 0 oil-free clean air for precision manufacturing
Permanent magnet variable frequency design for huge energy savings
Water lubrication structure with low long-term maintenance cost
Stable 24h continuous operation for industrial production

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Product Description

Brief Overview

Our EOWV-45A/W 45kW permanent magnet variable frequency oil-free water lubricating screw air compressor combines advanced water injection lubrication technology with energy-saving variable frequency drive. It consistently supplies ISO 8573-1 Class 1 zero-oil compressed air without any oil contamination. Built for heavy-duty industrial continuous operation, it cuts power consumption greatly while lowering daily upkeep expenses, extensively adopted in food, pharmaceutical, electronics, new energy and other precision manufacturing sectors demanding ultra-clean air.

Technical Parameters

Parameter Item	Specification
Model	EOWV-45A/W
Rated Motor Power	45kW
Adjustable Exhaust Pressure	0.8MPa / 1.0MPa / 1.25MPa
Air Delivery Capacity	7.80 / 6.15 / 5.20 m³/min (matched with different pressures)
*Overall Size (LWH)*	1980 × 1300 × 1760 mm
Net Weight	1300 kg
Air Outlet Port	2 inch
Air Quality Grade	ISO 8573-1 Class 0 Totally Oil-free
Driving Form	Rare Earth Permanent Magnet Synchronous Variable Frequency
Cooling Mode	Closed Circulating Water Cooling

Core Advantages

1
100% Class 0 Oil-Free Air, No Pollution to Products & Equipment

Demineralized water serves as the only lubricating medium instead of compressor oil. No oil mist or oil residue exists in output airflow, completely avoiding contamination of finished products and downstream precision machinery, complying with strict global food & medical safety standards.
2
Permanent Magnet Variable Frequency System, 25%-35% Power Saving

High-efficiency permanent magnet motor cooperates with intelligent frequency converter, automatically adjusting air output according to actual gas consumption. It eliminates no-load power waste, slashing long-term electricity expenditure for factories remarkably.
3
Stainless Steel Host + Water Cooling, Longer Service Lifespan

Water features superior heat dissipation effect, keeping compression temperature steady and low. All rotors and compression cavities are made of anti-corrosion stainless steel, no rust occurs even under long-term water lubrication, ensuring stable airflow for years.
4
Simplified Structure, 60% Lower Maintenance Cost

No complex oil separation, oil filtering and oil circulation systems required. Only air filter and water filter need regular replacement every 2000~3000 hours. Periodic oil changes are cancelled, greatly reducing annual spare parts and service fees.
5
Ultra-Low Noise & Intelligent PLC Touch Screen Control

Integrated silencing design lowers running noise below 72dB(A), can be placed directly inside production workshops. The touchscreen control panel supports real-time running data display, fault alarm, automatic protection and remote monitoring for convenient management.
6
Green Closed Water Circulation, Eco-Friendly & No Waste Oil Emission

Closed-loop water circulation consumes tiny amount of water daily, no waste engine oil discharge. It fully meets international environmental protection policies, avoiding factory environmental inspection troubles.

Application Scenarios

Food & Beverage Bottling lines, dairy processing, snack production, food fermentation and packaging
Pharmaceutical Industry Drug synthesis, tablet pressing, medical device production, sterile packaging
Electronics & Semiconductor PCB manufacturing, chip packaging, dust-free workshop gas supply
New Energy Lithium battery, photovoltaic cell production supporting equipment
Textile & Paper Industry Air jet looms, fine printing and paper making
Laboratories & Medical Institutions Hospital dental equipment, scientific research precision experimental gas source

Frequently Asked Questions (FAQ)

Q1: What is the gap between water-lubricated oil-free compressor and dry-type oil-free compressor?

A: Dry two-stage oil-free compressors consume much more electricity with expensive spare parts. Our single-stage water lubrication model achieves the same Class 0 oil-free air quality, with lower energy consumption and far cheaper maintenance, more cost-effective for long-term factory operation.

Q2: Will circulating water lead to rust inside the machine?

A: The entire compression host is stainless steel material. Matched deionized water treatment device provides purified circulating water, effectively preventing rust inside the cavity; the closed water system only needs small water replenishment every day.

Q3: Can this compressor work 24 hours non-stop all year round?

A: Absolutely. The whole machine is designed for industrial uninterrupted heavy load operation. Constant temperature control avoids overheating, perfectly fits round-the-clock continuous production lines.

Q4: What after-sales support do you offer overseas customers?

A: 2-year warranty for main airend, 1-year warranty for all electrical components. We provide lifelong spare parts supply, online remote fault troubleshooting, and on-site engineer service arrangement upon your demand.

Q5: How often does the system require routine maintenance and parts replacement?

A: Maintenance is exceptionally streamlined: only the air filter and water filter need regular replacement every 2000~3000 hours. Periodic oil changes and complex oil filtering replacements are eliminated entirely, cutting maintenance costs by up to 60%.

Q6: What air purity standard does this compressor guarantee?

A: The unit guarantees certified ISO 8573-1 Class 0 totally oil-free air. Pure demineralized water is the sole lubricating medium, ensuring zero risk of oil mist or residue in your production airflow.

China Oil-Free Water Lubricated Screw Air Compressor EOWV-45A/W Suppliers, Exporter

Product Description

Brief Overview

Technical Parameters

Core Advantages

Application Scenarios

Frequently Asked Questions (FAQ)

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