I 25/I28 series
Air-cooled high-pressure compressors for air and nitrogen up to 525 bar
- 1900-3500 l/min
- 90-525 bar
- 45-75 kW
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- SKU
- K25-K28-I
In stock
Quality & Innovation
Premium Industrial Quality for Demanding Applications
BAUER industrial compressors are manufactured to state-of-the-art production standards using precisely matched components. High-quality materials, precision manufacturing, and rigorous quality control ensure long service life, high reliability, and consistent performance under demanding industrial operating conditions.
Maximum operational safety for critical industrial environments
BAUER systems are engineered for maximum operational safety and feature comprehensive monitoring and protection functions. They ensure safe operation in demanding industrial environments while protecting personnel, equipment, and compliance with critical process requirements.
24/7 availability as a performance promise
BAUER industrial compressor systems are designed for continuous, 24/7 operation. As turnkey solutions, they are ready for immediate use: robust construction, service-friendly design, digital condition monitoring, and a global service network ensure maximum availability whenever it is required.
Engineering for efficiency, performance, and serviceability
The compressor system features a compact, ergonomic design engineered for high energy efficiency and reliable performance. An optimized layout ensures easy maintenance access and service-friendly operation, supporting low operating costs and long-term system availability.
Technical Data
High-pressure compressor I 25 / I 28, 1900–3500 l/min, 90–525 bar
| Model designation | Effective free air delivery ¹ | Maximum operating pressure ² | Number of stages | Rotational speed approx. | Motor power | Net weight approx. | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| l/min | m³/h | cfm | bar | psig | rpm | kW | kg | lbs | ||
| I 25 / I 28 series | 90 – 350 bar | ||||||||||
| I 25.0-45 | 1900 | 114 | 67 | 350 | 5100 | 4 | 1180 | 45 | 1750 | 3850 |
| I 28.0-55 | 2500 | 150 | 88 | 350 | 5100 | 4 | 830 | 55 | 1860 | 4090 |
| I 28.0-75 | 3500 | 210 | 125 | 350 | 5100 | 4 | 1180 | 75 | 1950 | 4290 |
| I 25 series | 420 – 525 bar | ||||||||||
| I 25.9-45 | 1900 | 114 | 67 | 525 | 7600 | 5 | 1180 | 45 | 1900 | 4180 |
| I 25.18-55 | 2300 | 138 | 81 | 525 | 7600 | 5 | 1100 | 55 | 1950 | 4290 |
¹ Free air delivery according to ISO 1217, power consumption at maximum final pressure under defined conditions.
² Max. operating pressure = maximum set pressure of the safety valve; shutdown pressure is lower.
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Details & Features
The air-cooled high-pressure compressors of the BAUER I 25 and I 28 series are robust, maintenance-friendly and designed for tough operating conditions. They impress with optimum free air delivery, flexible drive configurations and low installation costs. Thanks to proven BAUER system components, they offer high operational reliability and a long service life. Whether for standard compressed air applications in industry or as a mobile solution, these systems guarantee efficiency and reliability. Individually configurable and with worldwide BAUER service and spare parts supply, they are the ideal choice for tailor-made system solutions.
B-CONTROL MICRO compressor control system
The B-CONTROL MICRO is a modern, user-friendly compressor control system with a color display that intelligently manages and reliably monitors all basic functions. Interaction between the user and the control system is intuitive and straightforward, with information displayed in clear text. Various languages are available. External signal transmitters can be connected at any time, and operation in a networked system or with an external display is also possible.
Kompressorsteuerung B-CONTROL SMART
Die B-CONTROL SMART ist eine leistungsstarke Kompressorsteuerung mit erweitertem Funktionsumfang, viel Speicher und IoT-Konnektivität via B-CLOUD. Sie unterstützt den Verbundbetrieb und bietet hohe Performance für anspruchsvolle Anwendungen. Wahlweise mit 3,5" Farbdisplay oder 7" Touchscreen ermöglicht sie intuitive Bedienung und sicheren Fernzugriff – eine zukunftssichere Lösung.
System design
Air-cooled, belt-driven compressor units supplied on a sturdy base frame. Installs on vibration dampers and does not require a special foundation. The air-cooled compressor is designed for efficient heat dissipation and ease of service. The V-belt drive provides flexible, low-maintenance power transmission between the electric motor and compressor. The automatic condensate drain guarantees continuous operation by efficiently removing condensate.
Compressor block
Our air-cooled compressor blocks feature intercoolers, an aftercooler, an oil and water separator after each compression stage, and a reliable forced-feed oil lubrication system. Designed for automated systems, they are ideal for compressing air and gases at atmospheric intake pressure. Large coolers and ribbed cylinders ensure optimal heat dissipation, while ultra-fine oil filters, long maintenance intervals, and dynamically balanced drive systems guarantee high efficiency and smooth, low-vibration operation.
B-LINK 4G
With an integrated WiFi or 4G router, compressor systems equipped with B-CONTROL MICRO can be wirelessly connected to the B-CLOUD. This enables stable remote access, reliable remote monitoring, and secure data transmission via WLAN or mobile networks. If required, the B-LINK 4G can be installed externally to optimize signal strength. It is designed for use in Europe, the Middle East, Africa, and the Asia-Pacific region.
Options
Super Silent version
The Super Silent enclosure significantly reduces the sound pressure level of the compressor system and enables the connection of an exhaust duct. Its effective sound insulation ensures quieter operation and can also be retrofitted if required.
B-CONTROL III
The B-CONTROL III is the premium control system for complex applications. Its 7-inch touchscreen display provides a user-friendly visualization of all operating data. Features such as a data logger, USB interface, Remote HMI, and protocols including OPC UA, Modbus, and CAN bus are integrated. The control system supports up to four compressors in a network and can be expanded flexibly.
Soft start
For a smooth start-up of your system, the use of a soft starter is recommended, as it significantly reduces the starting current. From a motor power of 75 kW and above, this function is included as standard in combination with the B-CONTROL control system. Alternatively, a frequency converter can be used. In addition to enabling soft starting, it allows the delivery rate to be adjusted according to actual demand, helping to reduce energy consumption – for maximum efficiency and operational reliability.
Monitoring of intermediate pressures and intermediate stage temperatures
This monitoring system is ideal for continuous or fully automatic operation, as well as for systems without constant specialist supervision. If defined limit values are exceeded or undershot, an automatic shutdown is triggered. The current actual values are displayed in the B-CONTROL compressor control system.
Oil level monitoring
When the minimum oil level mark is reached, a warning message appears in the control system. This option is particularly recommended for continuous operation and increases the operational safety of the compressor system by providing early information about critical fill levels.
Intake filter monitoring
The intake filter is equipped with a vacuum monitoring system, which is continuously monitored by the B-CONTROL compressor control unit.
B-CLOUD & B-APP
With BAUER B-CLOUD and the B-APP, users can keep an eye on their compressor system at all times, even remotely. Operating data, maintenance instructions, and status messages are transmitted and visualized in real time. This increases transparency, simplifies monitoring, and supports optimized maintenance planning. In addition, the stored operating data in the B-CLOUD is available for later analysis and system performance optimization. If the condition of your compressor system changes, B-CLOUD or B-APP will notify you immediately – by email or via push notification straight to your smartphone.
B-LINK
Wi-Fi and 4G routers enable the wireless communication of the B-CONTROL MICRO with the B-CLOUD. They establish a reliable Wi-Fi or mobile network connection, allowing secure remote access to the compressor system.
Intermediate pressure gauge
Analog pressure gauges are installed at appropriate points of the compressor system and allow for easy monitoring of operating pressures. They support diagnostics and simplify maintenance work on the system.
Intake device and intake buffer vessel
The intake device supplies air or gas to the compressor at a monitored intake pressure. If predefined pressure limits are exceeded or not met, the system automatically shuts down for protection. To minimize pulsations in the intake area, the use of an intake buffer tank is recommended.
Condensate collection system 60 l
The large condensate collection system centrally collects the condensate generated during compression. An integrated float switch reliably monitors the fill level. The silencer and filter unit reduce noise and prevent unpleasant odors in the working environment.
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Frequently Asked Questions
Why is BAUER the right partner for industrial compressor solutions?
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End-to-end system expertise from a single source: BAUER provides fully integrated solutions across the entire process chain, including compression, air and gas treatment, quality monitoring, and audit-proof documentation from a single source.
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Most comprehensive options and accessories portfolio: BAUER offers the broadest options and accessories portfolio in the industry – precisely tailored to every application, without the need for custom designs.
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Most comprehensive air and gas treatment portfolio: From separators and regenerative and adsorption dryers to refrigerated dryers, BAUER covers all air and gas purity requirements in accordance with DIN ISO 8573-1.
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Global market leadership & service expertise: BAUER is the global market standard in high- and medium-pressure applications across nearly all segments – with a 70% market share in breathing air systems and an undisputed leading position in industrial applications, supported by a global service network.
What are the I25 and I28 series used for in high-pressure applications?
The I25 and I28 series comprise air-cooled high-pressure compressors for the compression of air and nitrogen. They are used wherever these gases need to be reliably compressed from atmospheric pressure to high final pressures, for example in industrial production processes, energy systems, test facilities, filling systems and technical installations with continuously high performance and pressure demand.
What performance ranges do the I25 and I28 series cover?
The high-pressure versions of the I25 and I28 series achieve final pressures of approximately 90 to 500 bar. Depending on the configuration and the gas used, the effective delivery rates range from 1,900 to 3,500 litres per minute. This makes the series suitable for both medium and very high-capacity high-pressure applications.
What characterises the technical concept of the I25 and I28 series?
The systems are V-belt driven, air-cooled and designed as multi-stage units. The multi-stage compression enables high final pressures while maintaining a compact and robust design. Large cooling fans ensure reliable cylinder cooling even at high ambient temperatures. The low-vibration design allows operation without the need for an elaborate foundation, even at high performance levels.
How are the I25 and I28 high-pressure compressors controlled and monitored?
The compressors are equipped with the B-CONTROL MICRO control system. This enables simple operation, continuous monitoring of all relevant operating parameters and connection to the B-CLOUD and the B-APP.
What advantages does the B-CLOUD offer?
The B-CLOUD enables central digital monitoring of the high-pressure system. Operating data, statuses and messages are available in real time and support condition-based maintenance as well as high system availability, particularly in high-performance industrial applications.
How maintenance-friendly are the I25 and I28 series?
The high-pressure compressors are designed for long maintenance intervals and low-maintenance continuous operation. The robust large-block design, easily accessible components and automatic condensate drainage reduce service effort and minimise downtime even under high load conditions.
Which applications are the I25 and I28 high-pressure compressors particularly suitable for?
The I25 and I28 series are particularly suitable for industrial compressed air and nitrogen supply, high-capacity test and inspection systems, filling processes, energy applications and technical systems with continuously high volume flow and high-pressure demand where maximum performance reserves and high operational reliability are required.
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