KIMAIR SI Seris Fixed-Speed Rotary Screw Air Compressors

The SI Seris Fixed-Speed Rotary Screw Air Compressor is a classic oil-injected rotary screw air compressor series launched by KIMAIR. It utilizes mature fixed-speed drive technology, making it an economical and reliable choice for meeting general industrial compressed air demands. With its efficient and stable airend design, rugged and durable construction, and simple maintenance features, this series provides a continuous and stable source of power for applications such as manufacturing workshops and automotive parts processing.

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Rotary Screw Air Compressors

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Video Tutorial

KIMAIR SI Seris Fixed-Speed Rotary Screw Air Compressors Principle Explanation Video

KIMAIR Core Advantages

Efficient and Reliable Airend System

Precision Rotor Profile: Employs 5th-generation asymmetric rotor profile, delivering high volumetric efficiency and excellent energy consumption performance.
Heavy-Duty Bearing Design: Uses internationally renowned brand bearings, ensuring long-term stable operation of the airend with a service life exceeding 60,000 hours.
Efficient Oil System: Features an optimized oil injection cooling and oil separation system, ensuring low oil carryover in the discharged air while effectively controlling operating temperature.
Rugged and Durable Machine Design

Integrated Modular Design: Main components are logically arranged with a compact structure to save floor space.
Heavy-Duty Frame and Sheet Metal: Constructed with reinforced steel and anti-rust treatment, suitable for various industrial environments.
Intelligent Protection System: Equipped with multiple protections such as motor overload, high discharge temperature, and low oil pressure, ensuring safe and worry-free operation.
Economical and Practical Operation & Maintenance

Standard Fixed-Speed Drive: Direct starting with a simple and reliable control system, resulting in low purchase and maintenance costs.
Convenient Maintenance Access: Service points (such as air filter, oil filter, and oil separator) are centrally located and easily accessible, reducing downtime.
Wide Voltage Adaptability: Can accommodate a certain range of voltage fluctuations, ensuring reliable operation even in areas with unstable power supply.

Technical Specifications

Model	Motor Power		Free air delivery (m³/min)			Outlet	Weight (kg)	Dimensions (mm)
Model	(kW)	(Hp)	0.7MPa	0.8MPa	1MPa	Outlet	Weight (kg)	Dimensions (mm)
K10SI	7.5	10	1.1	1.0	0.9	G¾	190	900600950
K15SI	11	15	1.9	1.8	1.5	G¾	236	11007501050
K20SI	15	20	2.4	2.3	2.0	G¾	236	11007501050
K30SI	22	30	3.7	3.6	3.1	G1	650	13808201260
K50SI	37	50	6.5	6.2	5.4	G1½	655	15009201260
K75SI	55	75	10.2	9.5	8.2	G2	950	160010501500
K100SI	75	100	13.6	12.8	11.0	G2	1070	200011501600
K120SI	90	120	16.1	15.5	13.0	G2	1221	200011501600
K150SI	110	150	21.3	18.8	16.8	DN65	1950	240016502000
K180SI	132	180	24.0	22.4	20.5	DN65	2150	240016502000
K220SI	160	220	27.0	26.5	22.5	DN80	3620	280018282150
K250SI	185	250	32.0	30.0	26.8	DN80	3920	280018282150
K270SI	200	270	34.5	34.0	30.5	DN80	4200	280018282150
K300SI	220	300	36.0	34.7	31.5	DN100	4800	426021822170
K340SI	250	340	43.0	41.0	38.0	DN100	5200	426021822170
K420SI	280	380	51.0	50.0	46.0	DN100	7300	436021502258
K420SI	315	420	56.0	55.0	50.0	DN125	7500	436021502258

Application Scenarios

The SI series is an ideal power source for the following applications:

- General Manufacturing: Supplies air for pneumatic tools and equipment such as presses, machine tools, and assembly lines.
- Automotive Parts Processing: Suitable for processes like brake system testing, parts cleaning, and painting.
- Small Workshops & Service Stations: Offers cost-effective solutions for intermittent or moderate air demand.
- Other Fields: Wood processing, textile auxiliary equipment, packaging machinery, etc.

Customer Frequently Asked Questions (FAQ)

Q: Are oil-injected screw air compressor noisy?

A: The KIMAIR SI series effectively controls operating noise below 72 dB(A) through airend vibration damping design, enclosure soundproofing materials, and a low-noise fan system, meeting the environmental requirements of most factory workshops.

Q: Is the SI model suitable for continuous operation?

A: Yes. The SI series is designed with industrial-grade airends and cooling systems, featuring excellent heat dissipation and a stable oil circuit circulation, supporting 24/7 continuous operation to meet the demands of two or three-shift production.

Q: Is daily maintenance complicated?

A: No, it is not complicated. Maintenance mainly involves regular replacement of the air filter, oil filter, oil separator, and lubricant. All maintenance points are designed for easy access and are accompanied by clear maintenance indicators. Users can perform these tasks themselves following the manual, or they can be quickly handled by a service engineer.

Q: What are the installation environment requirements for the equipment?

A: It is recommended to install the equipment indoors in a well-ventilated area with an ambient temperature between -5°C and 45°C, and with minimal dust. The foundation should be level and solid, with sufficient space around the unit for maintenance and heat dissipation.

Why choose the KIMAIR SI series?

- Proven Reliability: A classic fixed-speed model validated in global markets, featuring a low failure rate and stable operation.
- Cost-Effective: Optimizes initial investment cost while ensuring core performance, resulting in a lower total cost of ownership (TCO).
- Extensive Service Network: KIMAIR has service outlets across the country and in key overseas markets, providing fast parts supply and technical support.
- Comprehensive Certifications: Products comply with relevant national and industry standards, with optional certifications such as CE available to meet export requirements.