Large flow air compressor

DECHUAN supplier's Large flow air compressor series is designed for industrial production scenarios that require large flow rates, continuous operation, and high-quality oil-free air, such as chemical, electronics, textile, and food & beverage industries. This series uses high-speed rotating impellers to do work on air, utilizing centrifugal force for gas compression, achieving stable operation at large flow rates up to 7,000 m³/h and above. The compact structure occupies a small footprint. Energy cost accounts for about 80% of the total life cycle cost, so we pay special attention to energy efficiency in design. Compared with traditional screw compressors, this series can achieve a specific power as low as 5.5 kW/(m³/min) under the same flow conditions, significantly reducing maintenance costs.

Technical Core

Large flow air compressor achieves 100% oil-free compression in principle, providing reliable protection for industries with stringent compressed air quality requirements.

• Double seal design, Class 0 oil-free certification: The equipment uses an excellent double seal structure, composed of oil seals and air seals, ensuring that lubricating oil does not enter the compression chamber and contact the impeller, thus guaranteeing completely oil-free compressed air. It has passed Class 0 zero-oil certification, especially suitable for pharmaceutical, food, electronics and other industries with zero tolerance for oil contamination.
• Backward curved impeller design, high efficiency under all operating conditions: The impeller adopts advanced backward curved blade design for higher aerodynamic efficiency. Different impeller types enable different power and pressure specifications to perform excellently, optimizing compressor performance according to specific needs regardless of complex operating conditions.
• Adjustable inlet guide vanes (IGV), precise energy saving: The equipment is equipped with servo motor-driven inlet guide vanes, which can efficiently and reliably regulate flow according to actual air demand. Compared with valve regulation, adjustable inlet guide vanes can save up to 9% of energy consumption.

High-Efficiency Drive and Cooling System

Focusing on the energy efficiency optimization of the entire life cycle of the compressed air system, the design team has strengthened the drive and cooling systems of this series in several aspects.

• IE4 high-efficiency motor drive: Low-voltage models (up to 560kW) are equipped with built-in star-delta starters, and both air-cooled and water-cooled motor options are available. The IE4 high-efficiency motor effectively reduces specific energy consumption per unit of air delivery, saving considerable electricity costs for users over long-term operation.
• Compact aftercooler, low pressure drop and high energy efficiency: The integrated aftercooler combines compact structure, low approach temperature, and minimal pressure loss to maximize overall energy efficiency. The independently oversized oil cooler and aftercooler ensure low rotor outlet temperature and extend lubricating oil life.

Application Scenarios

Large flow air compressor is suitable for various industrial scenarios requiring large flow, continuous uninterrupted air supply, and strict compressed air quality.

• Chemical and petrochemical industry: Air separation units, instrument air, gas conveying, etc., require large amounts of clean compressed air; the high reliability and oil-free characteristics of the large flow compressor perfectly match this demand.
• Automotive manufacturing: Supplies pneumatic tools, painting equipment on automobile production lines, and process air for electric vehicle battery production lines.
• Electronics and semiconductor industry: Oil-free compressed air ensures precision electronic components are not contaminated by oil during production, guaranteeing product yield.
• Food and beverage industry: Compressed air directly or indirectly contacts food; Class 0 oil-free certification provides solid assurance for food safety.
• Pharmaceutical industry: Extremely high requirements for compressed air purity; oil-free large flow compressors are ideal for GMP-compliant production environments.
• Textile, paper, and chemical fiber industries: Air-jet looms, pneumatic conveying, etc., require continuous stable low-pressure high-flow air sources.
• Power and renewable energy: Reliable air source for gas turbine intake cooling, flue gas desulfurization, and other processes.
• Wastewater treatment: Biological aeration systems require large-flow low-pressure air; the equipment is stable, reliable, and low-noise, suitable for long-term continuous operation.

The oil-free characteristics and continuous operation capability of this series provide solid guarantees for production line stability and product quality in the above industries.

Product Specifications Overview

*Note: The above are general reference ranges; please refer to the selection proposal for specific model parameters.

What Our Customers Care About

When selecting large-flow oil-free compressed air equipment, industrial users typically focus on the following aspects:

• Long-term reliability: The compressor has no reciprocating parts and very few wearing parts, with a design service life of 15 to 20 years. High reliability for continuous operation, suitable for production scenarios running more than 8,000 hours per year. The non-contact design of centrifugal compressors has a theoretical life exceeding 100,000 hours, but bearing maintenance must be performed by professional teams.
• Low maintenance cost: Since the core compression process has no mechanical contact, daily maintenance only requires regular replacement of filters, lubricating oil, and seals, without complicated disassembly and inspection. Maintenance workload is much less than that of piston or multi-stage screw compressors of the same flow capacity.
• Ultra-high energy efficiency: In large-flow (≥7,000 m³/h), medium-to-low pressure applications, large flow air compressors have significant energy efficiency advantages over the whole life cycle. Specific power in the best efficiency range can be as low as 5.5 kW/(m³/min). The electricity saved by first-class energy efficiency models can pay back within a few years.
• Stable and pure air output: Completely oil-free compression ensures absolute stability of compressed air quality, especially suitable for precision manufacturing and direct contact processes.
• Quiet operation: Excellent balance of high-speed rotating parts results in smooth operation, low vibration, and low noise. For models with soundproof enclosures, noise levels can be further reduced, suitable for installation near production lines or in workshops with noise requirements.
• Compact installation and easy operation: Integrated structural design, some series require no external casing or additional accessories, facilitating installation and maintenance. Intuitive touchscreen controller displays key parameters such as pressure, temperature, current, and running time, making operation and maintenance straightforward.

Installation and Maintenance Guidelines

Correct installation and standardized maintenance are key to ensuring long-term stable operation and extending service life.

• Installation environment requirements: Install in a well-ventilated, dry, non-corrosive gas location with a flat floor, and reserve sufficient maintenance space around (at least 1.5 meters recommended). Ensure the air intake is away from dust and pollutant emission sources.
• Cooling system configuration: Depending on the selected configuration, ensure unobstructed air intake and exhaust for air-cooled models, and that cooling water quality, flow rate, and temperature meet equipment requirements for water-cooled models. Regularly clean dust from the radiator surface to prevent reduced heat exchange efficiency.
• Regular inspection and maintenance: Check the air filter element every 500 operating hours and clean or replace as needed. Check lubricating oil quality every 2,000 hours and replace according to recommended intervals. Check bearings every 1 to 2 years, focusing on temperature (operating temperature should not exceed 85°C) and vibration indicators. Impeller normal service life is 30,000 to 50,000 operating hours; check immediately if abnormal noise, increased vibration, or decreased discharge pressure occurs. It is recommended to forcibly replace seals every 12 to 18 months to prevent energy loss from micro-leakage (average annual loss 5-8%).
• Operation monitoring: It is recommended to install online vibration monitoring and oil quality analysis devices, which can provide early warning for 75% of lubrication failures. The intelligent touchscreen control system records operating parameters in real time and sets maintenance reminders, actively warning of potential problems.

Quality and Certification

• Class 0 oil-free certification: Guarantees absolutely oil-free compressed air, meeting the strictest air quality standards in pharmaceutical, food, electronics, and other industries.
• ISO international standard testing: All products are performance tested according to relevant international standards such as ISO1217 before leaving the factory, ensuring that performance parameters are true and reliable.
• Whole life cycle design concept: Energy efficiency and reliability are placed at the core from the design stage. Energy cost accounts for up to 80% of total life cycle cost, so every detail is optimized to reduce energy consumption.

Why Choose DECHUAN

DECHUAN's Large flow air compressor, with its 100% oil-free compression technology, backward curved high-efficiency impeller design, and IE4 high-efficiency motor, demonstrates excellent energy efficiency and reliability in large-flow continuous production scenarios such as chemical, automotive, electronics, food, and pharmaceutical industries. Class 0 oil-free certification guarantees absolutely clean compressed air; adjustable inlet guide vanes save up to 9% energy; the compact structure is easy to install and maintain; the whole life cycle design concept saves users considerable electricity and operation costs. DECHUAN has years of experience in industrial air system services and a professional technical support team, providing full-process support from selection evaluation, installation and commissioning to regular maintenance, helping you improve production line stability and reduce operational risks. For more product information or a custom selection proposal, please feel free to contact the DECHUAN sales engineering team.

FAQ

Q: What is the maintenance interval for the product?

A: Daily maintenance mainly includes: checking the air filter element every 500 operating hours; checking lubricating oil quality every 2,000 hours and replacing according to recommended intervals; checking bearings every 1 to 2 years; replacing seals every 12 to 18 months; the impeller normal service life is 30,000 to 50,000 operating hours. The touchscreen controller can set maintenance reminders and will automatically alert you when service is due.

Q: Does this equipment achieve true 100% oil-free compression?

A: Yes. This series uses a double seal design consisting of oil seals and air seals to ensure that lubricating oil does not enter the compression chamber and contact the impeller. The compressed air produced is completely oil-free and has passed Class 0 zero-oil certification, making it particularly suitable for pharmaceutical, food, electronics and other industries sensitive to oil contamination.

Q: How energy efficient is the equipment?

A: Energy cost accounts for about 80% of the total life cycle cost of a compressor. This series is designed and manufactured with maximum energy efficiency as the goal. The backward curved impeller design improves aerodynamic efficiency; adjustable inlet guide vanes can save up to 9% of energy compared to traditional valve regulation. The specific power of first-class energy efficiency models operating in the efficient range can be as low as 5.5 kW/(m³/min).

Q: Why does the DECHUAN Large flow air compressor support flow customization?

A: DECHUAN can provide customized selection solutions based on the customer's flow requirements (must reach 7,000 m³/h or above), pressure requirements, and operating conditions. By flexibly configuring impeller type, drive power, and control system, the equipment always operates in its best efficiency zone under the customer's specific conditions, helping users maximize return on investment.

Q: What is the noise level of the equipment? Is it suitable for installation inside a workshop?

A: This series has excellent balance of high-speed rotating parts, resulting in smooth operation, low vibration, and relatively low noise. For models equipped with soundproof enclosures, noise levels can be further reduced, allowing direct installation inside the production workshop without needing a separate soundproof room.