GWSPB Oil free Scroll Vacuum Pump

GWSPB series oil free scroll vacuum pump, also referred to as scroll pump, dry scroll pump, oil free scroll pump, oilless scroll pump, dry scroll vacuum pump, or oil free vortex vacuum pump, is perfectly designed for high-precision analytical instruments, laboratories, R&D, medical, and high-end vacuum systems. Featuring an integrated built-in controller that supports manual, remote, and RS485 communication, it offers a truly plug-and-play experience. With the advantages of an ultra-compact structure, even smaller footprint, and exceptionally low noise (≤ 53 dB(A)), it is ideal for space-limited and noise-sensitive environments. It is suitable for global laboratory power supplies (110V to 220V), supports one-button start, and can be frequently started and stopped between atmospheric pressure and vacuum.

GEOWELL is a professional manufacturer of scroll vacuum pumps with over 20 years of experience.

No oil Clean Vacuum

No oil back-diffusion, no oil mist exhaust, provide a clean vacuum environment

Wide product lineup

Pumping speed covers 4.5 to 24.8 m³/h, limited vacuum level 0.7 to 3 Pa

Low vibration & noise

Noise level ≤ 53 dB(A), the quietest solution for R&D and analytical instruments

Low Maintenance

No water cooled, no oil lubricated, no daily maintenance

Global Power Compatibility

110–460V, 50 or 60Hz. Ready for global installation.

Specifications
Operating Principle
Applications
Performance curves

Model			GWSPB75	GWSPB150	GWSB250	GWSPB300	GWSPB500
Pumping Speed	60Hz	l/s	1.3	2.5	3.8	5.0	8.3

		l/min	78.0	150.0	228.0	300.0	498.0
		m³/h	4.7	9.0	13.7	18.0	29.9
		cfm	2.8	5.3	8.1	10.6	17.6
	50Hz	l/s	1.1	2.1	3.2	4.2	6.9
		l/min	66.0	126.0	192.0	252.0	414.0
		m³/h	4.0	7.6	11.5	15.1	24.8
		cfm	2.3	4.5	6.8	8.9	14.6
Ultimate Vacuum (Gas Ballast Valve Closed)		mbar	≤ 2.0×10^-2	≤ 2.0×10^-2	≤ 7.0×10^-3	≤ 7.0×10^-3	≤ 3.0×10^-2
Ultimate Vacuum (Gas Ballast Valve Closed)		Torr	≤ 1.5×10^-2	≤ 1.5×10^-2	≤ 5.3×10^-3	≤ 5.3×10^-3	≤ 2.3×10^-2
Ultimate Vacuum (Gas Ballast Valve Open)		mbar	≤ 6.0×10^-2	≤ 6.0×10^-2	≤ 5.0×10^-2	≤ 5.0×10^-2	≤ 8.0×10^-2
Ultimate Vacuum (Gas Ballast Valve Open)		Torr	≤ 4.5×10⁻²	≤ 4.5×10⁻²	≤ 3.8×10⁻²	≤ 3.8×10⁻²	≤ 6.0×10⁻²
Max Water Vapor Pumping Rate		g/h	≤90	≤110	≤260	≤270	≤220
Noise Level		dB(A)	≤ 53
Leakage		mbar · l/s	1*10^-6
Max.Inlet / Exhaust Pressure		atm	1 / 1.3
Ambient Operation Temp.		℉	41 ~ 104
Motor 1 phase	Power	kW	0.4		0.55		0.75
	Voltage	V	100/115/200/230 (50/60Hz)(+/-10%), 100-240(50/60Hz)(+/-10%)
	Speed	rpm	1725(60Hz), 1425 (50Hz)
	Plug		North America, Europe, UK, Ireland, India
Dimensions		inch	15.19.311.4	15.89.511.1	15.910.611.8	16.510.711.7	16.210.512.0
Dimensions		mm	383236290	401242281	403268299	419271298	412267305
Weight		lbs	44	49	57	60	62
Weight		kg	20	22	26	27	28
Cooling Type			Air cooled
Others			With air flush

Safety Precautions

For dry and clean gas applications. Gas temperature must be below 122°F (50°C). Avoid direct intake of liquids, excessive water vapor, particles, dust, and corrosive gases unless the pump is specifically configured for these conditions.

Technical Resources & Support

Access the technical resources you need for your GWSPB variable-speed oil-free scroll vacuum pump, including operation and installation manuals, 3D CAD models, and factory test reports.
Whether you are preparing for system integration, installation, or routine service, our support center provides practical documentation and technical guidance to help you keep your vacuum system operating quietly and reliably.

GWSPB oil free scroll vacuum pump is constructed with pump body assembly, integrated controller module, crankshaft assembly, bracket assembly, and cooling fan system. It features a compact single-sided scroll design where one orbiting scroll orbits against the other fixed scroll to form several crescent-shaped pockets of different sizes. By means of an eccentric drive, the orbiting scroll is made to orbit about the fixed scroll, reducing the volume of the pockets and compressing gas from the periphery towards the center, thereby pumping the gas from vacuum chamber and discharging it through the exhaust port.

Semiconductor industry
Vacuum sputtering machine.
IC plasma cleaning machine.
IC plasma polishing machine.
IC packaging machine.
IC transmission chamber.

Photoelectric industry
LED vacuum annealing furnace.
Load lock/transfer chambers.
Glove box.
LED packaging machine.
Liquid crystal injection and packaging.

Material industry
Vacuum annealing furnace.
Vacuum diffusion oven.
3D metal printing.
Single crystal growth furnace.
Microwave cleaning and microwave drying machine.
E-beam/Laser melting.
Vacuum degassing. Vacuum gas substitution.

Food and drug industry
Freezing dry. Vacuum storage.

Medical equipment
Low temperature plasma sterilizer.
Vacuum storage.
Dental equipment.

Energy industry
SF 6 Gas recovery machine.
Lithium battery drying and packaging machine.

Analyzing instrument and device
Spectroscopy/scanning electron microscopy
Space environment simulation machine
Helium Leak detector
Mass spectrometer
Cryopump regeneration
Accelerators/synchrotrons

Vacuum equipment
Oil free ultrahigh vacuum unit
Oil free vacuum unit

Why Do You Need a Oil-free Scroll Pump?

Traditional oil-lubricated vacuum pumps can be a constant source of disruption due to their high maintenance needs.
Isn’t it frustrating when critical operations are delayed due to pump maintenance? Or when costs keep escalating because of constant oil changes and repairs?
These problems don’t just affect your operations – they eat into your budget, slow down productivity, and hinder your ability to deliver consistent results.
Say goodbye to these problems with Geowell’s oil-free scroll pumps. Our innovative, maintenance-free design ensures high reliability and efficiency, allowing you to focus on what really matters – your operations. Ready to revolutionize your vacuum generation processes? Let’s get started with Geowell.