KIMAIR EV Series Two-Stage Inverter Rotary Screw Air Compressors

The KIMAIR EV series two-stage inverter rotary screw air compressor automatically adjusts the motor speed according to actual air demand, thereby precisely controlling the free air delivery. When air demand is low, the compressor motor speed decreases, reducing unnecessary energy consumption; when air demand increases, the motor speed rises accordingly, ensuring sufficient compressed air is supplied in a timely manner. This intelligent regulation method not only reduces energy costs but also extends the compressor's service life.

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Inverter Rotary Screw Air Compressor

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Video Tutorial

KIMAIR EV Series Two-Stage Inverter Rotary Screw Air Compressors Principle Explanation Video

KIMAIR Core Advantages

High Efficiency & Variable Frequency Energy Savings

Combining the high efficiency of two-stage compression with the demand-based air supply of variable frequency technology delivers comprehensive energy savings that far exceed those of single-technology products.
Stable Output Across a Wide Pressure Range

Maintains high efficiency across a broad pressure and flow range, adapting to complex and changing process requirements.
Exceptional Reliability

Low-temperature operation combined with flexible control results in minimal mechanical stress and excellent equipment durability.
Intelligent Control

Can be integrated into a centralized control system, enabling multi-machine coordination and energy efficiency management.

Technical Specifications

Model	Motor Power		Free air delivery （m³/min）				Lub. Oil（L）	Outlet	Weight（kg）	Dimensions （mm）
Model	（kW）	（Hp）	0.7MPa	0.8MPa	1MPa	1.3MPa	Lub. Oil（L）	Outlet	Weight（kg）	Dimensions （mm）
K30EV	22	30	4.2	3.9	3.4	2.6	15	G1¼	650	14008501600
K50EV	37	50	7.5	7.0	6.2	5.1	35	G1½	980	16009701830
K75EV	55	75	12.0	11.0	9.5	7.8	45	G2½	1600	186013001750
K100EV	75	100	16.2	15.0	13.0	11.0	60	DN65/G2	1800	190015501700
K120EV	90	120	19.5	18.5	16.2	12.5	80	DN80	2500	238017501900
K150EV	110	150	23.1	21.7	19.2	17.0	90	DN100	2800	240018501970
K180EV	132	180	28.5	27.1	23.8	21.0	115	DN100	3200	270019002200
K220EV	160	220	32.0	30.9	28.5	24.0	120	DN100	4200	300018852446
K250EV	185	250	37.9	35.2	31.2	27.5	150	DN125	4950	320019002450
K270EV	200	270	43.0	40.5	35.0	31.0	160	DN125	5000	320019002450
K300EV	220	300	46.0	44.0	38.5	33.0	200	DN125	5100	320019002450
K340EV	250	340	52.0	50.0	42.5	37.5	220	DN125	5200	330024002400
K380EV	280	380	56	54.5	50.5	42.0	235	DN125	7300	345023002750
K420EV	315	420	64	62	55.0	47.0	240	DN125	7400	380024002800

Application Scenarios

- High-demand process air in large chemical and pharmaceutical plants (with fluctuating loads)
- Blow-off and pneumatic conveying systems requiring high flow regulation
- Core energy-saving airend in large air compressor stations

Customer Frequently Asked Questions (FAQ)

Q: Is the EV series suitable for air demand scenarios with frequent load fluctuations?

A: The EV series is precisely the ideal solution designed for complex and variable air demand conditions. Its core technical advantages lie in the deep integration of "two-stage compression" and "variable frequency regulation." Two-stage compression ensures high efficiency, while the intelligent variable frequency system responds in real-time to changes in pipeline pressure, accurately adjusting the output volume. This combination allows the EV series to continuously operate within the optimal energy efficiency range even during frequent load fluctuations, completely avoiding the energy waste caused by the "load/unload" mode of traditional fixed-speed units or the efficiency drop of single-stage units. Therefore, in typical variable load scenarios such as injection molding, die casting, and intermittent production lines, its advantages in energy savings (typically 30%-50%) and pressure stability (±0.02 MPa) are most significant.

Q: For applications requiring higher pressures (e.g., 2.0-3.0 MPa), what are the benefits of choosing the EV two-stage variable frequency unit over a higher-power single-stage variable frequency unit?

A: This is a very professional selection question. In the higher pressure range, compared to simply increasing the power of a single-stage variable frequency unit, the EV two-stage variable frequency unit offers three core advantages:
1. Significant Energy Efficiency Advantage: Two-stage compression divides the compression ratio, reducing the workload and discharge temperature of each stage. Its adiabatic efficiency is much higher than that of single-stage high-pressure compression. This means that for the same output pressure and flow, the EV consumes significantly less energy, resulting in substantial long-term electricity cost savings.
2. Greatly Enhanced Reliability: Lower operating temperatures (typically 15-25°C lower than single-stage units) mean longer lubricant life and less thermal stress on core components such as the main bearings and rotors. This fundamentally improves equipment reliability and service life, reducing the risk of unplanned downtime.
3. More Precise and Stable Pressure Control: The two-stage airend combined with a high-performance variable frequency drive provides stronger suppression of pressure fluctuations, delivering extremely stable output pressure, which is critical for pressure-sensitive high-precision processes (e.g., specific testing phases).

Why choose the KIMAIR EV series?

- Energy Efficiency Champion for High-Pressure, Variable-Load Conditions: Specifically addresses the energy consumption pain points of high-pressure scenarios with load fluctuations, maximizing energy savings.
- Model of Technology Integration: It is not a simple combination but a deep coupling of two-stage compression and variable frequency control, achieving a system performance where 1+1 > 2.
- Ensuring Continuous Production: Exceptional reliability design guarantees an uninterrupted, stable air source for critical production processes.
- Future-Ready System Core: Powerful communication and control capabilities make it the undisputed core airend for intelligent air compressor stations.