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Water-lubricated Oil-free Permanent Magnet Variable Speed Drive Rotary Screw Air Compressor

Rated Power: 7.5~250 kW Discharge Pressure: 0.8~1.25 MPa Free Air Delivery: 0.24~43.5 m³/min

Product Introduction

Water-lubricated Oil-free Permanent Magnet Variable Speed Drive Rotary Screw Air Compressor

Product Features

An oil-free air compressor that uses only purified water.
The entire product lineup has been certified by TÜV Germany.	0-Level Oil-Free Certification
All-stainless-steel alloy airend and system	High-quality component design and configuration

High-efficiency airend

The Wan Beardsley water-lubricated screw compressor airend features a PEEK rotor—made from an ultra-high-strength, exceptionally wear-resistant polymer—along with aerospace-grade all-stainless-steel rotors and a cutting-edge manufacturing process, delivering uncompromising precision and performance.

Human-Machine Interface System

Chinese–English display; touch‑type buttons; intuitive, quick, and convenient menu operation; allows presetting and control of delay times for star‑delta switching, starting, loading, stopping, overvoltage, and other functions during operation; provides display and handling of various on‑site faults; stores and retrieves information on fault types and occurrence times; features a built-in calendar that maintains accurate timekeeping over the long term and can be manually adjusted; accumulates and permanently records operating time, loading time, unloading time, and the service life of each filter.

High-performance vector inverter

Standard equipment includes a high-frequency reactor, effectively reducing both the high-frequency emissions from the inverter and external magnetic field interference; it reliably lowers peak inrush current during startup, enabling smooth acceleration; and helps cut costs on power‑supply equipment. A specialized thermal‑management design prevents tripping under summer heat. Dust‑proof mesh and a surface coating on the circuit board provide protection against dirt, dust, and moisture. Compliance with the CAN standard protocol, coupled with hardware‑level wiring specifications, delivers strong noise immunity. The system rapidly tracks pressure changes, keeping pressure fluctuations within ±0.01 MPa while delivering robust performance; it precisely supplies the required air volume. Integrated fan and motor with dual‑vector vector‑control inverter technology.

Permanent Magnet Motor

IE4 ultra‑efficient permanent‑magnet motor; extremely low rotor inertia for rapid response; uses rare‑earth permanent‑magnet materials with exceptionally high intrinsic coercivity, offering excellent resistance to demagnetization; delivers constant torque across both the slip‑frequency and rated speed ranges; features a unique asymmetric magnetic circuit design that minimizes torque ripple at low speeds; boasts high balance accuracy, smooth operation at high speeds, low noise, and minimal vibration.

Intake valve

A newly designed, integrated intake valve featuring specialized engineering, offering a wide adjustment range for air intake and pressure regulation. It delivers low pressure loss, stable operation, and extended service life. Key components of the intake valve, including the solenoid valve, are sourced from internationally renowned brands, ensuring safe operation and cost-effective control of the screw compressor.

Detachable water-cooled heat exchanger

The plate material is made of a special stainless steel, offering excellent corrosion resistance and high heat-transfer efficiency, thereby ensuring near-isothermal compression of the system. In addition, the system features a compact footprint, reduced cooling water consumption, minimal pressure loss, and ease of maintenance and cleaning.

Water softener

By applying the principle of ion exchange, it removes scale-forming ions from the water, effectively preventing scale buildup in the system while keeping maintenance costs low.

Water filter

The housing is made of stainless steel, and the custom-designed filter element offers high filtration accuracy and long service life, ensuring a clean system free of contaminants.

Technical Specifications

Model No.	Rated Power	Discharge Pressure	Free Air Delivery (FAD)	Cooling Water Flow (Inlet 32℃)	Lubricating Water Flow	Noise Level	Cooling Water Inlet/Outlet Size	Outlet Pipe Size	Unit Weight	Overall Dimensions LWH
	(kW)	(MPa)	(m³/min)	(m³/h)	(L/min)	dB(A)	(EN)	(EN)	(kg)	(mm)
WZW-7.5A0.8VD	7.5	0.8	0.35~1.17	2	10	58	3/4”	314”	510	8008001200
WZW-7.5A1.0VD		1	0.3~1.05
WZW-7.5A1.25VD		1.25	0.24~0.81
WZW-11A0.8VD	11	0.8	0.54~1.65	2.5	26	60	1”	3/4”	620	11507551340
WZW-11A1.0VD		1	0.45~1.42
WZW-11A1.25VD		1.25	0.35~1.10
WZW-15A0.8VD	15	0.8	0.75~2.43	3.5	26	63	7”	3/4”	679	11507551340
WZW-15A1.0VD		1	0.65~2.17
WZW-15A1.25VD		1.25	0.6~1.80
WZW-18.5A0.8VD	18.5	0.8	0.9~3.13	4	30	65	1”	1”	730	14009001450
WZW-18.5A1.0VD		1	0.9~2.82
WZW-18.5A1.25VD		1.25	0.6~2.05
WZW-22A0.8VD	22	0.8	1.1~3.52	5	30	65	1”	1”	780	14009001450
WZW-22A1.0VD		1	0.97~3.21
WZW-22A1.25VD		1.25	0.85~2.78
WZW-30A/W0.8VD	30	0.8	1.55~5.12	7	40	67	11/2”	11/4”	1150	1550*11501550 [A] 150011501300 [W]
WZW-30A/W1.0VD		1	1.255~4.43
WZW-30A/W1.25VD		1.25	1.1~3.63
WZW-37A/W0.8VD	37	0.8	1.91~6.30	9	40	67	11/2”	11/4”	1200	1550*11501550 [A] 150011501300 [W]
WZW-37A/W1.0VD		1	1.60~5.33
WZW-37A/W1.25VD		1.25	1.42~4.77
WZW-45A/W0.8VD	45	0.8	2.50~7.4	10	90	68	11/2”	2”	1490	198013001760 [A] 180013001680 [W]
WZW-45A/W1.0VD		1	1.91~6.30
WZW-45A/W1.25VD		1.25	1.70~5.56
WZW-55A/W0.8VD	55	0.8	3.0~9.76	12	120	70	11/2”	2”	1570	198013001760 [A] 180013001680 [W]
WZW-55A/W1.0VD		1	2.60~8.55
WZW-55A/W1.25VD		1.25	2.30~7.67
WZW-75A/W0.8VD	75	0.8	3.95~13.00	18	120	73	11/2”	2”	2250 1750	210016001900 [A] 220015001800 [W]
WZW-75A/W1.0VD		1	3.40~11.50
WZW-75A/W1.25VD		1.25	3.0~9.70
WZW-90A/W0.8VD	90	0.8	5.0~14.8	20	180	73	11/2”	21/2”	3150 2450	240016002000 [A] 220015001800 [W]
WZW-90A/W1.0VD		1	4.30~13.90
WZW-90A/W1.25VD		1.25	3.72~12.60
WZW-110A/W0.8VD	110	0.8	6.0~19.85	24	180	78	2”	21/2”	3150 2580	300017002250 [A] 220015001800 [W]
WZW-110A/W1.0VD		1	5.0~16.66
WZW-110A/W1.25VD		1.25	4.65~15.56
WZW-132A/W0.8VD	132	0.8	6.75~23.1	30	240	78	2”	21/2”	3500 2700	300017002250 [A] 220015001800 [W]
WZW-132A/W1.0VD		1	6.0~19.97
WZW-132A/W1.25VD		1.25	5.07~16.90
WZW-160W0.8VD	160	0.8	8.5~28.11	35	240	80	3”	DN80	3900	270018002050
WZW-160W1.0VD		1	7.6~25.45
WZW-160W1.25VD		1.25	6.7~22.52
WZW-185W0.8VD	185	0.8	10~33.97	38	300	80	3”	DN80	4050	270018002050
WZW-185W1.0VD		1	8.72~29.00
WZW-185W1.25VD		1.25	7.75~25.21
WZW-200W0.8VD	200	0.8	11.2~36.75	42	300	80	4”	DN100	4200	270018002050
WZW-200W1.0VD		1	9.68~32.78
WZW-200W1.25VD		1.25	9.2~29.24
WZW-220W0.8VD	220	0.8	12.2~39.67	47	360	80	4”	DN100	4400	270018002050
WZW-220W1.0VD		1	11.2~36.75
WZW-220W1.25VD		1.25	9.0~29.63
WZW-250W0.8VD	250	0.8	13.5~43.5	58	360	80	4”	DN100	4800	270018002050
WZW-250W1.0VD		1	12.3~39.30
WZW-250W1.25VD		1.25	10.2~34

Remarks:

1. In our model naming convention, WZW stands for oil-free water-lubricated; W, water-cooled; V, PM VSD; D, single-stage twin-screw.

2. Compressor volumetric flow is tested under loaded conditions complying with GB/T3853 (equivalent to ISO1217) and GB19153-2019.

3. Standard power supply: 380V, 3-phase, 50Hz. Earthing is mandatory. For custom power supply, water-cooled units, units with different discharge pressures and other special requirements, please contact your sales representative.

4. Final dimensions refer to the latest official drawings. We reserve the right to revise product specifications without prior notification.

Features:

Oil-free operation, ensuring compliance with stringent cleanliness standards in industries such as food, pharmaceuticals, and semiconductors.

Applications:

Pharmaceutical manufacturing, deep processing of food and beverages, semiconductor chips and microelectronics, medical device production, dental and surgical operating rooms, high-end lithium‑ion battery production lines, optical instruments and precision optics, tobacco processing, premium cosmetics manufacturing, biological laboratories and testing facilities, as well as high‑end food blow‑molding for beverages, among others.