Core technology comes from Kaishan North America R & D Center. The "Y-4" Oilless Screw Air Blower Profile invented by Dr. Tang Yan, a world-famous compressor expert, is adopted. Its super-energy-efficient design idea, perfect workmanship and quality assurance, plus world-top machining test facilities, can ensure the high energy efficiency of products, with their reliability reaching the world-leading level.

	Highly-efficient screw rotor profile Y-4, exclusively developed for blast blowers.
	Multiple Vi (volume ratio) design, aimed at the demands of different pressure working conditions, providing the main engine with the best efficiency. Precision synchronizer gears, higher efficiency and higher reliability.
	Highly-efficient motor, a large starting torque.
	Air intake filter---high-efficiency low pressure  drop, air inflow and outflow silencer design, plus acoustic enclosure, lower noise.
	Complete system design, including air filter, silencer, main engine, motor, starting cabinet, control system, lubricating system, cooling system, acoustic enclosure and base.
	Forced lubricating system, more steady and reliable operation of main engine.
	Kaishan smart controller, colored touch screen, image-text display, friendly interface, simple and easy operation.

In contrast with Root's blower, Oil-free Air Blowers can save 35% energy at most

The Energy Efficiency Contrast Diagram between Screw Air Blower and Traditional Root's Air Blower.

The pressure/ volume diagram of screw blast blower                 Energy consumption / Energy saving ◆ Thermodynamic energy consumption ◆ Energy saving 4→1: Suction 1→2: Internal compression. Intermeshing of opposing rotors, decrease of volume between teeth, and increase of pressure. 2→3: Exhausting. The air is discharged from the pipe.

The pressure/ volume diagram of Root's blast blower                 Energy consumption ◆ Thermodynamic energy consumption 4→1: Suction 1→2: The air volume remains unchanged. Air is compressed outside due to the backpressure of pipe network. 2→3: Exhausting. The air is discharged from the pipe.

Performance Advantages of Screw Air Blower Contrasted with Root's Air Blower:

1. Higher efficiency, lower noise;

2. Allowing a higher rotating speed and tooth-crest speed;

3. Capable of reaching a higher discharge pressure;

4. A lower pressure fluctuation;

5. Root's blast blower does not have internal compression.

The main engine of Root's blast blower

The main engine of screw blast blower.