How do WS‑Series scroll compressors generate oil‑free air?

WS‑Series compressors use an innovative scroll design with two interlacing spiral scrolls—one fixed and one orbiting—to compress air. Because there is no metal‑to‑metal contact, the system requires no lubrication and delivers consistently oil‑free air for critical applications.

Why are WS‑Series compressors ideal for sensitive environments?

The WS‑Series combines oil‑free compression with a compact footprint and quiet operation. This makes it well suited for laboratories, healthcare, food and beverage, and other environments where air purity, low noise, and a healthier workspace are important.

How does the scroll compression process maintain consistent airflow?

As air enters the scroll set, it is trapped in pockets that move inward toward the center. These pockets gradually shrink, increasing pressure in a smooth, continuous process until the air is discharged through the center outlet.

WS-Series Oil-Free Scroll Air Compressors 4-30kW

Product Photo Exterior side Oil free air compressors scroll ac 430kw 540hp WS 4s

Product Photo Exterior side Oil free air compressors scroll ac 430kw 540hp WS 7.5

Product Photo Exterior side Oil free air compressors scroll ac 430kw 540hp WS 22t

WS-Series oil-free scroll air compressors from Ingersoll Rand offer high-quality, oil-free air in an efficient, flexible package. The innovative scroll design eliminates the need for lubrication and ensures compressed air meets precise standards for your critical processes. A compact footprint and quiet operation enable use in a variety of settings and provide an ideal solution for a healthy work environment. Flexible design options give you the freedom to create a compressed air system customized to your needs.

100% Oil-Free Air: Simple tip seal design of the scroll compressor ensures no metal-to-metal contact anywhere and eliminates the need for lubrication, ensuring high-quality, oil-free air
Energy Efficiency: Multiplex design allows for operation of the exact number of compressors to match your demand with part-load efficiency
Ergonomic Design: Smaller footprint and superior noise control ensure the system fits anywhere and provides a safe, comfortable working environment
Enhanced Reliability: Fewer components and less consumables provide higher reliability and result in longer compressor life, less maintenance, and longer service intervals
Flexible Design Options: Multiple configurations and rich options allow you to create a compressed air system that meets your unique needs

Product Chart How Scroll Compressors Work

Model	# pumps	Nominal Power (HP)	FAD @ 100 pisg (116 psig max)	FAD @ 100 pisg (145 psig max)	Base Mount	Tank-mount 30 gal	Tank-mount 80 gal	Tank-mount 120 gal	Drain (Manual)	Drain (Electric)
WS4S	Simplex	5	14.6	12.3	●	●	●	-	●	●
WS5.5S	Simplex	7.5	21.5	16.1	●	-	●	●	●	●
WS7.5S	Simplex	10	31	25.3	●	-	●	●	●	●
WS7.5D	Duplex	10	29.2	24.6	●	-	-	-	-	-
WS11D	Duplex	15	43	32.2	●	-	-	-	-	-
WS15D	Duplex	20	62	50.6	●	-	-	-	-	-
WS11T	Triplex	15	43.8	36.9	●	-	-	-	-	-
WS17T	Triplex	22.5	64.5	48.3	●	-	-	-	-	-
WS22T	Triplex	30	93	75.9	●	-	-	-	-	-
WS15Q	Quadraplex	20	58.4	49.2	●	-	-	-	-	-
WS22Q	Quadraplex	30	86	64.4	●	-	-	-	-	-
WS30Q	Quadraplex	40	124	101	●	-	-	-	-	-

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WS-Series Oil-Free Scroll Air Compressors 4-30 kW

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Oil-Free Scroll Air Compressor Systems Brochure

W-Series Oil-Free Scroll Air Compressors 2-30 kW

Oil-Free Scroll Air Compressor Systems 2-33 kW