KIMAIR SLI Series Low-Pressure Rotary Screw Air Compressors

The SLI series is a Low Pressure Screw Air Compressor designed by KIMAIR specifically for high-volume, low-pressure air demand applications. By optimizing the Airend rotor profile, flow channels, and control system, it delivers significantly higher Free Air Delivery [FAD] and superior operational efficiency at working pressures of 0.3-0.5 MPa. It perfectly meets the specific low-pressure process air requirements of industries such as textiles, glass, and chemicals, making it an ideal energy-saving alternative to traditional Roots Blowers or high-pressure compressors used with Pressure Drop via throttling.

Category：

Low-Pressure Rotary Screw Air Compressor

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Video Tutorial

KIMAIR SLI Series Low-Pressure Rotary Screw Air Compressors Principle Explanation Video

KIMAIR Core Advantages

Low Pressure, High Volume

- Specifically designed for low-pressure conditions. At 0.3-0.5 MPa, its free air delivery significantly exceeds that of equivalent power high-pressure models.
High Efficiency & Energy Savings

- Low-pressure operation inherently consumes less power. Combined with a high-efficiency Airend, it achieves excellent Specific Power. Compared to depressurized high-pressure units or Roots Blowers, energy savings can reach 20%-40%.
Stable Operation

- Utilizes screw compression principles for pulse-free, stable air supply with minimal pressure fluctuation, benefiting sensitive low-pressure processes.
Easy Maintenance

- Inherits KIMAIR's reliable mechanical structure and convenient maintenance design.

Technical Specifications

Model	Motor Power		Pressure（MPa）	Free air delivery（m³/min）	Outlet （inch/mm）	Weight (kg)	Dimensions （mm）
	（kW）	（Hp）
K30SLI	22	30	0.4	6.2	DN65/G2	800	135011201430
			0.5	5.4	G2	600	12008751526
K45SLI	30	45	0.4	9.0	G2 1/2	900	160014501850
		45	0.5	7.0	G2 1/2	650	150010401650
K50SLI	37	50	0.3	11.5	DN100	1050	160014501850
			0.4	10.0	DN80	900	152013201790
K60SLI	45	60	0.3	14.0	DN100	1600	205015381840
		60	0.4	11.0	DN100	1400	175015501900
K75SLI	55	75	0.3	17.5	DN125	2000	205015381840
			0.4	15.0
K100SLI	75	100	0.3	23.0	DN150	2600	250017001940
			0.4	20.0		2500
K120SLI	90	120	0.3	30.0	DN150	2800	300018002000
			0.4	23.0		2200
K150SLI	110	150	0.3	32.0	DN150	3000	275018002100
			0.4	28.0
K180SLI	132	180	0.3	40.0	DN200	3300	330019502100
			0.4	35.0
K220SLI	160	220	0.3	49.0	DN200	4100	260022002270
			0.4	41.0
K250SLI	185	250	0.3	57.0	DN200	5400	315023002400
			0.4	48.0
K270SLI	200	270	0.3	62.0	DN200	6100	380024002550
			0.4	54.0
K300SLI	220	300	0.3	67.0	DN200	6300	400024002530
			0.4	59.0
K340SLI	250	340	0.3	77.0	DN250	7800	450024002700
			0.4	65.0	DN200

Application Scenarios

- Textile Industry: Air jet looms, rotor spinning

- Glass Manufacturing: Bottle conveying, cleaning, and cooling

- Chemical Industry: Pneumatic conveying of materials, fluidized beds

- Wastewater Treatment: Aeration basin blasting (requires Air Treatment System)

- Grain Processing: Grain conveying

Customer Frequently Asked Questions (FAQ)

Q: What is the difference between a low-pressure compressor and a standard Air Compressor (0.8 MPa) used with a Pressure Drop?

A: There is a fundamental difference. A standard Air Compressor is optimized for 0.8 MPa. Operating it at low pressure severely deviates from its design point, resulting in high energy consumption, high Discharge Temperature, and increased wear. The SLI low-pressure unit is specifically designed for low-pressure conditions, offering higher efficiency, more economical operation, and longer life.

Q: Can the SLI series replace Roots Blowers?

A: Yes, for most medium to low-pressure, high-volume air demands. Compared to Roots Blowers, the screw-type low-pressure compressor offers significant advantages: higher efficiency (especially at partial load), lower Noise Level, lower Vibration Level, simpler maintenance, and no risk of Surge. It is an excellent choice for energy-saving upgrades.

Why choose the KIMAIR SLI series?

- Professional Low-Pressure Solution: A purpose-built device for low-pressure processes, not a modified general-purpose product.

- Significant Economic Benefits: Directly reduces the energy consumption per unit of air produced in low-pressure systems, achieving marked energy savings compared to traditional solutions.

- Reliable Industrial Quality: Inherits the reliable DNA of KIMAIR Screw Air Compressors; core components are durable.

- Comprehensive Technical Support: Provides full-process professional services from sizing calculations and system design to installation and commissioning.