KIMAIR FS Series PM Motor Inverter Rotary Screw Air Compressors

The FS series is a cost-effective permanent magnet variable speed screw air compressor launched by KIMAIR for small and medium-sized enterprises and the general industrial market. Built on the core technology of permanent magnet variable speed drives and a reliable single-stage airend, this series has been precisely optimized for cost. It aims to provide customers who are first-time users of variable speed compressors or those seeking the best value for money with an affordable, high-performance, and energy-saving device. The FS series achieves a balance between high-efficiency technology and an accessible price, making it a practical choice for users looking to upgrade their air station for energy savings and reduce production electricity costs.

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PM Motor Inverter Rotary Screw Air Compressor

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Video Tutorial

KIMAIR FS Series PM Motor Inverter Rotary Screw Air Compressors Principle Explanation Video

KIMAIR Core Advantages

Affordable Pricing, Easy Upgrade

- With a highly competitive initial investment cost, it significantly lowers the barrier to adopting permanent magnet variable speed technology, allowing small and medium-sized enterprises to easily upgrade their equipment.
Core Energy Savings, Reliable and Efficient

- Equipped with an IE4 high-efficiency permanent magnet synchronous motor, significantly improving motor efficiency compared to traditional induction motors.
- Uses vector frequency conversion drive, enabling 0-100% stepless speed regulation that precisely matches actual air demand, avoiding wasteful unloading. Comprehensive energy savings can reach 20%-35% (compared to older fixed-speed models of the same specification).
Stable, Durable, and Easy Maintenance

- Utilizes a proven, highly efficient single-stage screw airend with long bearing life and reliable operation.
- Optimized, integrated air and oil systems result in a compact structure with fewer potential failure points, making daily maintenance simple and intuitive.
Intelligent Control, User-Friendly Operation

- Features an intelligent controller with a Chinese display, monitoring pressure, temperature, and operating status in real-time, with fault alarm and protection functions.
- Supports basic automation functions like scheduled start/stop and automatic load/unload, meeting the needs of most production scenarios.

Technical Specifications

Model	Motor Power		Free air delivery（m³/min）			Lub. Oil（L）	Outlet	Weight（kg）	Dimensions（mm）	Remarks
Model	（kW）	（Hp）	0.7MPa	0.8MPa	1.0MPa	Lub. Oil（L）	Outlet	Weight（kg）	Dimensions（mm）	Remarks
K10FS	7.5	10	1.10	1.09	0.95	5	G¾	180	9506781140	-
K20FS	15	20	2.40	2.30	1.93	8	G1	280	10007401185	-
K30FS	22	30	3.60	3.47	3.10	12	G1½	430	10009201477	-
K50FS	37	50	6.80	6.58	5.70	17	DN65	580	147010501380	-

Application Scenarios

Small and Medium-sized Manufacturing Plants: Hardware processing, plastic products, furniture manufacturing, packaging, printing, and other intermittent or two-shift production workshops.
Energy Replacement for Fixed-Speed Compressors: Replaces existing high-energy-consumption, old piston or fixed-speed screw compressors, offering a fast return on investment.
Applications with Significant Air Demand Fluctuations: Auto repair shops, small assembly lines, and scenarios with distributed pneumatic tools, where variable speed characteristics provide an ideal match.
Energy-Saving Projects Sensitive to Initial Investment: Serves as an entry-level choice for Energy Management Contracts (EMC) or energy-saving retrofits.
Distributed Air Source Points: Provides a dedicated and flexible air source for independent workshops or production lines.

Customer Frequently Asked Questions (FAQ)

Q1: As an "affordable" series, does the FS series compromise on quality and lifespan?

A: Not at all. The "affordability" of the FS series comes from streamlining non-core luxurious features and optimizing the supply chain, not from lowering core standards. We insist on using branded permanent magnet motors, reliable screw airends, and key variable frequency drive systems, ensuring the equipment's fundamental performance, efficiency, and durability. It is a "performance-focused" energy-saving product built on solid quality.

Q2: Compared to the higher-end PSO series (oil-cooled motor), is the FS series right for me?

A: It depends on your operating conditions. If your environment is a general industrial setting (without extreme dust or high heat) and you operate in single or two-shift cycles, the FS series' air-cooled design is fully capable and offers a better cost advantage. The PSO series (oil-cooled, IP65) is specifically designed for harsh conditions (dusty, humid) with 24/7 continuous heavy-duty operation. The FS series is the "economical" solution for most standard scenarios.

Q3: How are the advertised 20%-35% energy savings achieved? How long until the investment pays back?

A: Savings come primarily from the high efficiency of the permanent magnet motor and the variable speed drive's ability to supply air on demand, eliminating the ~40% unloaded energy loss typical of fixed-speed machines. Taking a 37kW unit as an example, running 4000 hours annually at an electricity cost of 0.8 RMB/kWh, annual electricity savings could reach 20,000-30,000 RMB. The price difference compared to a standard fixed-speed machine is typically recovered within 1-2 years through electricity savings.

Q4: Is variable speed drive (VSD) maintenance complex and expensive?

A: The FS series uses industrial-grade, standard VSDs with mature technology and high reliability. They require no special daily maintenance. Their design life aligns with the airend, and as standard components with wide market availability, if replacement is ever needed, costs are controlled and supply is fast.

Why Choose the KIMAIR FS Series Affordable Model?

1. Clear Positioning, Honest Value: We clearly state that the FS series is "affordable," being transparent about its value proposition so you only pay for the core performance you need.
2. Tangible Energy Savings: Although positioned as an entry-level model, the core energy-saving features of the permanent magnet variable speed drive are uncompromised, delivering immediate electricity savings.
3. Low Total Cost of Ownership: Low initial purchase cost, low operating energy consumption, and low maintenance costs minimize the overall lifecycle cost.
4. Brand Assurance and Service Network: Backed by the KIMAIR global service system, ensuring timely technical support and spare parts availability for peace of mind.
5. Ideal Entry Point for Energy-Saving Upgrades: For users considering variable speed energy savings but concerned about cost, the FS series represents the lowest-risk, clearest-return choice.