30 Bar Air Compressors

30 bar catalogue configurations for initial comparison

The 30 bar (3.0 MPa) selection table lists documented electric medium/high-pressure examples from the EBLW, EBLGII and EBLGIII model families. Its validated entries span source nominal volume-flow values from 1 to 33 m³/min, so the table can help frame a small process branch as well as a larger high-pressure utility duty. It is a starting configuration list: select on the pressure and flow required at the use point, then define the package boundary around it.

The source labels flow as nominal volume flow in m³/min. It does not identify those values as FAD, so do not compare them with another bidder’s FAD, standard-flow or normal-flow figure without first aligning reference conditions. Likewise, motor rated power is one catalogue field, not the electrical-input figure for a finished compressor, cooler, dryer, receiver and control package.

• Use 30 bar (3.0 MPa) as the declared system pressure category and state the required pressure at the measurement point.
• State nominal, continuous, peak and recovery requirements separately, with one declared flow reference basis.
• Ask for the selected configuration’s delivered-flow evidence at the stated pressure and operating conditions.
• Define the included compressor, cooling, treatment, storage, controls and distribution interfaces before comparing quotations.

Choose direct high-pressure compression or a booster path

A direct 30 bar package is a practical comparison where a high-pressure duty is sustained, coordinated across several users or supplied through a dedicated header. Where only one local machine has an intermittent 30 bar event, compare a lower-pressure base system plus booster as a separate architecture. The better option depends on the event profile, inlet pressure stability, allowed recovery time, location of storage and how the high-pressure user is isolated when idle.

Compare complete system boundaries rather than an unsupported efficiency claim. A meaningful proposal states the assumed operating hours, pressure at the compressor and process connection, flow reference, control method, auxiliary loads and treatment pressure loss. It should also explain how the high-pressure branch responds when its user starts, stops or is offline.

Build a 30 bar package around cooling, treatment and storage

For the source table’s 3.0 MPa entries, the temperature fields show ≤90°C without a separate aftercooler and ≤ambient +18°C with a separate aftercooler. Use those catalogue fields only as a starting point for the proposed cooling arrangement. The quotation must identify cooling medium, design ambient or cooling-water conditions, drain locations, discharge temperature at the stated boundary and the pressure rating of the complete air path.

Aftercoolers, moisture separators, automatic drains, filters, dryers, receivers, regulators, hoses, valves and gauges all need a working-pressure and temperature rating suitable for the 30 bar system. State the required air quality at the process point and leave the treatment pressure drop in the pressure budget. A receiver can buffer an event and let the compressor or booster recover between events, but it must be sized for the usable pressure band, rated for the jurisdiction and equipped with the required relief, isolation, inspection and drain provisions.

Use 30 bar only where the process requirement supports it

A 30 bar system should be considered when the machine manufacturer or process specification calls for approximately 3.0 MPa at the relevant point of use. High-pressure forming or blowing duties can have short, high-flow events; a test or process branch may instead have a steadier demand. In either case, record the actual pressure, flow, event duration, overlap with other users and allowed recovery time before choosing a direct package, booster path or receiver location. For process-specific context, see PET bottle blowing and laser cutting.

The supplied catalogue identifies this high-pressure family as a micro-oil screw series, not as an oil-free range. It must not be represented as automatically suitable for every PET, food-packaging or direct-product-contact duty. Define the required particles, water, oil and any process-specific contaminants at the sampling point; then assess compression technology, treatment, drainage, pipework and verification together. ISO 8573-1 provides the framework for stating particles, water and oil classes, but a class specification does not by itself prove a finished system is suitable for a particular process.

Protect the pressure boundary during installation and service

Define electrical supply, starting or drive arrangement, heat rejection, ventilation, condensate handling, acoustic limit, lifting route, foundations and service clearance before finalising the package. Keep access to coolers, filters, drains, relief devices, gauges and isolation points clear. High-pressure branches should have a documented pressure boundary from compressor discharge to use point, including the receiver, flexible connections and any booster or regulator.

Controls must be checked against the real event profile. Request pressure sequencing, high-temperature protection, alarm and trip set points, restart behaviour, remote signals and the logic for a booster or receiver branch. Maintenance should follow the offered OEM configuration and local safety procedure, covering lubricant, filters, coolers, drains, relief devices and pressure isolation. Acceptance testing should identify pressure measurement points, the flow basis, stabilization period, permitted tolerance, electrical measurement boundary and any air-quality sampling method.