The rotor features a new, energy‑saving, high‑efficiency profile, delivering stable, high‑performance operation. With a two‑stage independent compression design, equal pressure ratios, and low rotational speeds, air delivery is increased by more than 15% at the same power level. Each stage’s low compression ratio ensures reduced leakage and higher volumetric efficiency. Interstage oil‑mist spray cooling keeps the entire compression process close to isothermal compression, enhancing adiabatic efficiency. The two rotor sections are directly driven by helical gears, enabling each rotor to achieve optimal peripheral velocity and maximizing compression transmission efficiency. With minimal load on the rotors and bearings, the compressor boasts an extended service life under continuous operation.
Intelligent Microcomputer Control System
Simple to operate, it supports switching between Chinese and English, as well as between Traditional and Simplified Chinese. It features intelligent monitoring and management of air filters, oil filters, oil‑fine separators, and lubricating oil, along with a remote monitoring function for users to choose from.
Wan Beardsley Air Compressor Cloud Platform
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 field 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 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 heat‑dissipation design prevents thermal shutdowns in summer’s high temperatures. A dust‑proof mesh is standard, and the circuit board features a surface coating that provides resistance to dirt, dust, and moisture. It supports the CAN standard protocol, with defined hardware cabling specifications and 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.
High-efficiency, energy-saving permanent magnet motor
The main motor is a high-efficiency, energy-saving permanent‑magnet motor with an IP55 protection rating, carefully selected to meet the specific requirements of the air compressor. It fully complies with national energy‑efficiency standards, features Class F insulation and Class B temperature rise, effectively preventing the ingress of dust and particulates, and is equipped with SKF heavy‑duty bearings to ensure long‑term, continuous, trouble‑free operation.
High-efficiency, quiet cooling fan
Ultra-quiet, high‑airflow inverter‑controlled cooling fan; low pressure drop, low noise, and low power consumption; high heat‑transfer efficiency, centrifugal cooling fan—quiet and highly efficient.
Energy-Saving Intake Control System
A newly designed, integrated intake valve featuring specialized engineering, with a wide adjustment range, pressure‑regulating valve control, minimal pressure loss, stable operation, and extended service life. The key component of the intake valve—the solenoid valve—is sourced from internationally renowned brands, ensuring safe and cost‑effective operation of the screw compressor.
Enhance the specially customized oil–gas separation system.
A specially designed extra-large oil separator tank and oil separator element, rated for 0.5 MPa and 0.2 MPa, effectively ensures lower energy consumption; the air filter, oil–gas separator, and oil separator element all utilize imported filter media from Germany; three-stage fine separation—rotational centrifugal separation, mechanical impact, and adsorption‑coalescence—guarantees an oil content in the compressed air of less than 2 ppm; the tank lid is galvanized for an attractive finish that resists rust; and a shock‑absorbing cushioning pad prevents pipe rupture caused by vibration.
China Level 1 Energy Efficiency Label
Authoritative Testing
Wan Beardsley two-stage compression permanent-magnet variable-frequency air compressor
The Wan Beardsley two-stage compressor consumes 0.092 kWh per cubic meter of gas, with a specific power of 5.5 kW·min/m³.
Around 15%
About 15% more energy-efficient than National Level 1 energy efficiency.
In 2015, two-stage compression consumed 0.108 kWh per cubic meter of gas, with a specific power of 6.5 kW·min/m³.
Around 25%
About 25% more energy-efficient than the national Level 2 energy efficiency standard.
From 2009 to the present, single-stage compression has achieved an electricity consumption of 0.121 kWh per cubic meter of gas, with a specific power of 7.3 kW·min/m³.
Around 35%
About 35% more energy-efficient than the national Level 3 energy efficiency standard.
For equipment purchased before 2009, the electricity consumption per cubic meter of gas is 0.135 kWh, with a specific power of 8.4 kW·min/m³.
Technical Specifications
Model No.
Rated Power
Discharge Pressure
Free Air Delivery (FAD)
Noise Level
Outlet Pipe Size
Unit Weight
Overall Dimensions L*W*H
(kW)
(MPa)
(m³/min)
dB(A)
(EN)
(kg)
(mm)
WZS-22A/W0.4V/GP
22
0.4
6.4
66±3
RC11/2
1350
1800*1000*1380
WZS-22A/W0.5V/GP
0.5
6.25
WZS-30A/W0.4V/GP
30
0.4
8.8
66±3
RC11/2
1550
1800*1270*1550
WZS-30A/W0.5V/GP
0.5
7.2
WZS-37A/W0.4V/GP
37
0.4
10.5
68±3
RC21/2
1900
2100*1360*1660
WZS-37A/W0.5V/GP
0.5
10.0
WZS-45A/W0.4V/GP
45
0.4
13.2
68±3
RC21/2
2100
2100*1360*1660
WZS-45A/W0.5V/GP
0.5
12.0
WZS-55A/W0.4V/GS/H/P
55
0.4
16.5
70±3
RC21/2
2200
2200*1600*1900
WZS-55A/W0.5V/GS/H/P
0.5
15.0
WZS-75A/W0.4V/GS/H/P
75
0.4
20.5
70±3
DN80
2800
2150*1500*1790
WZS-75A/W0.5V/GS/H/P
0.5
18.5
WZS-90A/W0.4V/GS/H/P
90
0.4
25.5
72±3
DN80
2800
2720*1720*1900
WZS-90A/W0.5V/GS/H/P
0.5
23.0
WZS-110A/W0.4V/GS/H/P
110
0.4
30.0
72±3
DN80
3200
3280*1800*2370
WZS-110A/W0.5V/GS/H/P
0.5
28.0
WZS-132A/W0.4V/GS/H/P
132
0.4
36.0
72±3
DN100
3500
3280*1800*2370
WZS-132A/W0.5V/GS/H/P
0.5
32.5
WZS-160A/W0.4V/GS/H/P
160
0.4
43.5
74±3
DN125
4100
3280*1800*2370
WZS-160A/W0.5V/GS/H/P
0.5
41.0
WZS-185A/W0.4V/GS/H/P
185
0.4
49.0
74±3
DN125
4500
3700*2150*2400
WZS-185A/W0.5V/GS/H/P
0.5
45.0
WZS-200A/W0.4V/GS/H/P
200
0.4
55.0
76±3
DN150
5100
3700*2150*2400
WZS-200A/W0.5V/GS/H/P
0.5
50.0
WZS-220A/W0.4V/GS/H/P
220
0.7
50.0
76±3
DN125
6200
3800*2250*2250
WZS-220A/W0.5V/GS/H/P
0.8
46.0
WZS-250A/W0.4V/GS/P
250
0.4
65.0
78±3
DN150
6600
4350*2250*2350
WZS-250A/W0.5V/GS/P
0.5
61.0
Remarks:
1. In our model naming convention, WZS stands for oil-injected screw; A/W, air-cooled/water-cooled; V/G, PM VSD/fixed-speed; S/H/P, vertical/transverse/horizontal two-stage compression.
2. According to airend layout, two-stage screw compressors include vertical two-stage (upper-lower), transverse two-stage (left-right), and horizontal two-stage (front-rear).
3. Compressor volumetric flow is tested under loaded conditions complying with GB/T3853 (equivalent to ISO1217) and GB19153-2019.
4. Standard power supply: 380V, 3-phase, 50Hz. Earthing is mandatory. Custom power supply, water-cooled units, units with different discharge pressures and other special requirements, please contact your sales representative.
5. Final dimensions refer to the latest official drawings. We reserve the right to revise product specifications without prior notification.
Features:
Specifically designed for low-pressure, high-flow applications; eliminates the need for high-pressure relief, with energy consumption 30%–40% lower than conventional 8-bar models, delivering consistently stable, high‑volume airflow.
Applications:
Textile and synthetic fiber industries (the largest‑scale use case), environmental wastewater treatment and biofermentation, powder conveying in cement and building materials, the paper industry, glass and ceramic production, pneumatic conveying of food, grain, and oil products, chemical raw material handling, auxiliary processes in lithium‑ion battery and photovoltaic manufacturing, non‑ferrous metal smelting, as well as large‑scale central air‑conditioning systems and ventilation support in cleanrooms.
