The rotor employs a new, energy‑saving, high‑efficiency profile, delivering stable, high‑efficiency performance. Featuring a two‑stage, independent compression design with equal pressure ratios and low rotational speeds, it achieves a more than 15% increase in air delivery at the same power level. The low compression ratio of each stage ensures reduced leakage and higher volumetric efficiency. Interstage oil‑mist spray cooling brings the entire compression process close to isothermal compression, enhancing adiabatic efficiency. The two rotor stages are directly driven by helical gears, enabling each stage to attain optimal peripheral velocity and achieving highly efficient power transmission. 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, and an intuitive, quick, and convenient menu interface; allows presetting and control of delay times for star‑delta switching, starting, loading, stopping, overpressure, and other operations; 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; and 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. 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, complies with hardware cabling specifications, and offers 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 prevents 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. A three-stage precision separation system—rotational centrifugal separation, mechanical impact, and adsorption‑coalescence—keeps the oil content in the compressed air below 2 ppm. The tank lid is galvanized for an attractive finish that resists rust. Shock‑absorbing cushioning pads prevent pipe rupture caused by vibration.
China’s 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 the national Level 1 energy efficiency standard.
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/W0.7V/GP
22
0.7
4.4
66±3
RC11/2
1350
1800*1270*1550
WZS-22A/W0.8V/GP
0.8
4.2
WZS-22A/W1.0V/GP
1.0
3.5
WZS-22A/W1.25V/GP
1.25
3.2
WZS-30A/W0.7V/GP
30
0.7
6.5
66±3
RC11/2
1550
1800*1270*1550
WZS-30A/W0.8V/GP
0.8
6.2
WZS-30A/W1.0V/GP
1.0
4.9
WZS-30A/W1.25V/GP
1.25
4.2
WZS-37A/W0.7V/GP
37
0.7
7.5
68±3
RC21/2
1900
1300*1000*1420
WZS-37A/W0.8V/GP
0.8
7.2
WZS-37A/W1.0V/GP
1.0
6.5
WZS-37A/W1.25V/GP
1.25
5.4
WZS-45A/W0.7V/GP
45
0.7
10.0
68±3
RC21/2
2100
1800*1270*1550
WZS-45A/W0.8V/GP
0.8
9.0
WZS-45A/W1.0V/GP
1.0
7.8
WZS-45A/W1.25V/GP
1.25
6.5
WZS-55A/W0.7V/GS/H/P
55
0.7
13.0
70±3
RC21/2
2200
2100*1360*1660
WZS-55A/W0.8V/GS/H/P
0.8
12.5
WZS-55A/W1.0V/GS/H/P
1.0
10.5
WZS-55A/W1.25V/GS/H/P
1.25
9.0
WZS-75A/W0.7V/GS/H/P
75
0.7
17.5
70±3
RC21/2
2800
2150*1500*1790
WZS-75A/W0.8V/GS/H/P
0.8
16.5
WZS-75A/W1.0V/GS/H/P
1.0
13.0
WZS-75A/W1.25V/GS/H/P
1.25
10.0
WZS-90A/W0.7V/GS/H/P
90
0.7
21.0
72±3
DN80
2800
2720*1720*1900
WZS-90A/W0.8V/GS/H/P
0.8
19.0
WZS-90A/W1.0V/GS/H/P
1.0
16.5
WZS-90A/W1.25V/GS/H/P
1.25
14.5
WZS-110A/W0.7V/GS/H/P
110
0.7
24.5
72±3
DN80
2800
2600*1500*2000
WZS-110A/W0.8V/GS/H/P
0.8
23.5
WZS-110A/W1.0V/GS/H/P
1.0
19.5
WZS-110A/W1.25V/GS/H/P
1.25
17.5
WZS-132A/W0.7V/GS/H/P
132
0.7
30.0
72±3
DN100
3000
3600*1500*2000
WZS-132A/W0.8V/GS/H/P
0.8
28.0
WZS-132A/W1.0V/GS/H/P
1.0
23.0
WZS-132A/W1.25V/GS/H/P
1.25
19.5
WZS-160A/W0.7V/GS/H/P
160
0.7
35.0
74±3
DN100
4100
3200*1860*2400
WZS-160A/W0.8V/GS/H/P
0.8
32.6
WZS-160A/W1.0V/GS/H/P
1.0
29.0
WZS-160A/W1.25V/GS/H/P
1.25
23.5
WZS-185A/W0.7V/GS/H/P
185
0.7
42.0
74±3
DN100
4500
3200*1860*24000
WZS-185A/W0.8V/GS/H/P
0.8
38.0
WZS-185A/W1.0V/GS/H/P
1.0
36.5
WZS-185A/W1.25V/GS/H/P
1.25
28.0
WZS-200A/W0.7V/GS/H/P
200
0.7
45.0
76±3
DN125
5100
3200*1860*2400
WZS-200A/W0.8V/GS/H/P
0.8
42.0
WZS-200A/W1.0V/GS/H/P
1.0
38.5
WZS-200A/W1.25V/GS/H/P
1.25
32.0
WZS-220A/W0.7V/GS/H/P
220
0.7
50.0
76±3
DN125
6200
3200*1860*2400
WZS-220A/W0.8V/GS/H/P
0.8
46.0
WZS-220A/W1.0V/GS/H/P
1.0
41.5
WZS-220A/W1.25V/GS/H/P
1.25
38.5
WZS-250A/W0.7V/GS/P
250
0.7
55.0
78±3
DN125
8200
3700*2200*2300
WZS-250A/W0.8V/GS/P
0.8
52.0
WZS-250A/W1.0V/GS/P
1.0
46.0
WZS-250A/W1.25V/GS/P
1.25
40.0
WZS-280A/W0.7V/GS
280
0.7
58.0
78±3
DN150
8500
4200*2300*2400
WZS-280A/W0.8V/GS
0.8
55.0
WZS-280A/W1.0V/GS
1.0
50.0
WZS-280A/W1.25V/GS
1.25
43.0
WZS-315A/W0.7V/GS
315
0.7
65.0
80±3
DN150
8850
4560*2450*2450
WZS-315A/W0.8V/GS
0.8
61.0
WZS-315A/W1.0V/GS
1.0
56.0
WZS-315A/W1.25V/GS
1.25
51.0
WZS-350A/W0.7V/GS
350
0.7
73.0
80±3
DN150
9250
4800*2450*2450
WZS-350A/W0.8V/GS
0.8
70.0
WZS-350A/W1.0V/GS
1.0
61.0
WZS-350A/W1.25V/GS
1.25
54.0
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.
Applications:
Woodworking and furniture manufacturing, automotive repair and maintenance shops, electronics and home appliance assembly, packaging and printing in light‑industry facilities, aluminum doors, windows, and hardware production, textile and garment factories, general food and grain processing, small injection‑molding and rubber‑processing plants, advertising and signage fabrication, general mechanical machining, warehousing and logistics, small‑scale environmental water treatment, building materials and stone processing, and other industries.
