United OSD_Go Beyond Energy Saving...

Language

Centrifugal Compressor

Ultra-high Speed Centrifuge/YB/YC

Two-stage VPM (VFD+PM) Screw Air Compressor

Refrigerated Air Dryer

Purge-Free Blower Purge Heat Reactivation Adsorption Air Dryer

Products

Two-stage VPM (VFD+PM) Screw Air Compressor

The UNITED OSD two-stage VPM screw air compressor uses a permanent magnet synchronous motor, requiring no excitation current, resulting in high efficiency and no reactive power loss. The two-stage compression speed is high, and after frequency conversion, the air supply pressure range is wide and stable. The most significant advantages are energy saving and high air output. The air intake volume is adjusted in real-time according to air demand, ensuring the air compressor operates more efficiently.

View Details +

Oil-free Variable Frequency 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 cooling, the compressed air is usually cooled, equipped with pre-coolers, intercoolers, and after-coolers, to meet the requirements for outlet temperature. High-performance shaft seals on the rotor shaft prevent lubricating oil from leaking into the compressed air, achieving oil-free operation. UNITED OSD oil-free variable speed screw air compressors can change the power frequency, adjust the load, and reduce power consumption. The frequency converter, with the inverter as its core, changes the motor's operating speed through the conversion of industrial frequency.

View Details +

Centrifugal Compressor

A centrifugal compressor is a dynamic compressor that enables gas to gain kinetic and pressure energy through the rotation of impellers. It possesses advantages such as large flow rate, high rotational speed, compact structure, and stable operation, and is widely applied in fields like petrochemicals, power, and metallurgy.

View Details +

Low Pressure Fixed Speed Screw Air Compressor

The UNITED OSD low-pressure series screw air compressor is a new type of compressor developed for energy saving, emission reduction, and environmental protection needs. It changes the traditional high-pressure compressor's method of supplying compressed air to air equipment after decompression, thereby saving energy. Currently, in the screw air compressor industry, the UNITED OSD's exhaust pressure can be as low as 1.2 bar, ensuring an exhaust oil content of less than 2ppm and providing clean and stable air supply. The enclosed cabinet with low-noise design is more environmentally friendly than piston compressors. Given that many industries do not require downtime, maintenance can be ensured during continuous operation; equipped with a fault alarm, it prepares users for emergencies, ensuring stable and reliable operation.

View Details +

Single-stage VPM (VFD+PM) Screw Air Compressor

UNITED OSD single-stage variable frequency screw air compressor UD-VFD series adopts vector control technology, ensuring low motor temperature rise and obtaining suitable torque over a wide speed range, driving the air compressor to operate stably. Vector control technology separately controls the excitation and torque vectors of the stator current, then synthesizes them and converts them into inverter parameter control signals to achieve full control over electromagnetic torque. This allows the motor to maintain low-temperature operation even at low speeds. This type of variable frequency technology can suppress the unavoidable noise and harmful harmonics in standard inverters. Adopting a new generation of proprietary vector variable frequency control, which converts DC to AC, improves high-temperature resistance, achieves higher conversion efficiency, saves energy consumption, and enhances reliability.

View Details +

Industry application

Metallurgical Industry

The Metallurgical Industry Covers Core Areas Such as Steel, non-ferrous metals (copper, aluminum, etc.), and electrolytic aluminum, involving high-energy-consuming complex processes like high-temperature smelting, refining, and rolling. It has extremely high requirements for the stability, oil-free cleanliness, and pressure accuracy of compressed air.

Automobile Manufacturing

The Automotive Industry Covers Vehicle Manufacturing, painting, testing, and parts production, relying on compressed air to drive automated production lines. It requires a 24-hour continuous air supply with zero oil content to avoid affecting the quality of painting and precision assembly.

Electronic Semiconductor

The Electronics Industry Has Stringent Requirements For the cleanliness (Class 0 oil-free) and dryness (dew point below -40℃) of compressed air, which directly impacts the yield rate of chips and panels.

Food And Beverage

Food and Beverage Production Must Comply wWth FDA/GB Food Safety Standards. Compressed air is in direct contact with materials and must be sterile, oil-free, corrosion-resistant, and suitable for high-temperature cleaning environments.

Pharmaceutical Manufacturing

Pharmaceutical production must meet GMP certification requirements. Compressed air is used in critical processes such as fermentation, drying, and packaging, and must be absolutely oil-free, sterile, and low-noise.

New Energy

Lithium battery production is extremely sensitive to environmental humidity and dust control. Compressed air needs to be deeply dried (dew point -70℃), have zero oil content, and meet explosion-proof requirements.

About us

Founded in 2002, Shanghai United Compressor Co., Ltd. is dedicated to developing and manufacturing industrial high-efficiency compressors and core components, specializing in energy-saving technologies for compressed air systems and providing related services.

In 2013, United entered a joint venture with Hitachi Group, a Fortune 500 company, which is a well-known enterprise founded in 1910 with over 100 years of experience in compressor manufacturing. The J/V cooperation not only complements each other's product vacancy but also enhances each other's ability to design, production, quality control and service. As a result, United rose to become a leading air compressor manufacturer in China.

Adhering to the concept of "energy-saving and environmental protection”, United has successively launched product lines including micro-oil/oil-free screw compressors, centrifugal compressors, high-efficiency air compressor stations, and scroll compressors. On this basis, it has also developed industry-specific products as well as special compressors. United is one of the few domestic companies with the ability to independently research and produce compressor mainframes.

Unitec is committed to becoming a world-leading supplier of compressed air system solutions.

Learn more →

Service and Support

Unites Compressors is committed to building a network of specially trained service experts and teams to provide you with installation, commissioning, maintenance and repair services for combined compressors at any time.

Currently, Unites has established 100 domestic network service stations in China, and is gradually improving its overseas marketing service network.

The goal of Unites Compressors is to ensure a high level of operational safety for our customers and to maximize the availability of compressors through preventive maintenance, especially in challenging environments such as Atmosphere Leakage (ATEX) or coastal areas.

There is no better choice than our service and genuine spare parts!

Learn more →

Professional service

Free training

Monthly inspection

Worry-free after-sales

News Center

News

Ride the Wind and Break the Waves, Ushering in a New Chapter | The 2025 UNITED Dealer Conference Successfully Concludes

The tide is surging, it's time to set sail! On March 10, the United 2025 Dealer Conference, themed "Riding the Waves, Starting a New Chapter," successfully concluded in Jinan, Shandong. Hundreds of dealer partners from across the country and the company's core team gathered in Quancheng to jointly strategize with great momentum, witness technological breakthroughs, and celebrate glorious achievements. This grand event, full of wisdom and passion, set the course for Uniteus's new year journey, moving forward bravely through the waves with its partners!

2025-04-11

News

As the Hanover Stage Concludes, UNITED Embarks on a new Journey of Global Industrial Empowerment.

The 2025 Hannover Messe, themed "Technology Shaping the Future," concluded successfully on April 4, 2025, at the Hannover Exhibition Center in Germany. During the exhibition, United, with its technological innovation, industry influence, and international presence, attracted professional visitors from over 60 countries and regions, fully demonstrating the strength and responsibility of "Made in China".

2025-04-05

News

Hannover Messe Day 3 | UNITED Demonstrates New Possibilities For Industry 4.0 with 'Smart Manufacturing From China'.

As one of the few compressor manufacturing enterprises in the world that simultaneously possesses independent intellectual property rights for both main engines and complete machines, United not only holds a leading position in the domestic market but also showcases its strong technical prowess and innovative spirit on the international stage. At the exhibition, United's booth was bustling with people, and distributors from all over the world stopped by, showing great interest in United's products and technology.

2025-04-03

Contact Information

Service Hotline : 400-889-6699

Tel : 021-69176699

Customer Service Email : service@sunc.cn

Business Cooperation Email : zhangjie@sunc.cn

Address : No. 201, Jiamei Road, Nanxiang High-Tech Park, Jiading District, Shanghai

UNITED OSD，Go Beyond Energy Saving...