Product Introduction
Product Features
The single-screw compressor airend features a more rational and reliable high-pressure section.
Proprietary seal design
As the third stage and high-pressure section of a medium-pressure air compressor, it endures significantly higher internal pressures than conventional compressors. Its specially designed seals effectively prevent leaks, ensuring reliable operation under high pressure.
The single-screw high-pressure section is uniquely advantageous.
Fully balanced compression, with no radial unbalance forces; no leakage gaps, resulting in higher volumetric efficiency compared to twin-screw compressors.
It features low‑pulse vibration and is far more environmentally friendly than reciprocating compressors; it delivers high pressure, high efficiency, and excellent cost‑effectiveness; and its specialized design ensures reliable operation.
Atmospheric-pressure section, single high-efficiency two-stage compression airend
The two compression stages are driven by precision gears, ensuring that the rotors of each stage operate at their optimal peripheral speed and delivering superior energy efficiency. Between the first- and second-stage compressors, atomized cooling oil is injected for interstage cooling, while an optimized flow‑path design enables compressed air to pass with virtually no pressure loss, significantly enhancing overall efficiency.
The entire series comes standard with a permanent‑magnet variable‑frequency motor, which, combined with vector‑control VFD technology, precisely adjusts speed in response to changes in air demand, delivering greater efficiency and energy savings. In the atmospheric‑pressure stage, primary compressed air at 6 bar is produced; after oil–air separation and cooling, it passes through the standard external refrigerant dryer before entering the high‑pressure stage for further compression. The compression process in the atmospheric‑pressure stage closely approximates ideal isothermal compression, resulting in higher overall efficiency.
A reliable single-screw compressor airend at the high-pressure end
The leak‑free triangular design delivers a volumetric efficiency exceeding 90%, resulting in higher overall efficiency, with a single‑stage compression ratio of up to 30 under atmospheric pressure. Improved dynamic balance of the meshing pair extends the service life of bearings and other components, while reducing machine vibration and noise. The star wheel is crafted from a specialized rare material, offering superior mechanical properties, and its precision manufacturing process minimizes vibration and wear.
The high-precision manufacturing and machining of the high-pressure-stage single-screw compressor housing enable it to withstand pressures of up to 70 bar.
The permanent-magnet variable-frequency motor, combined with vector control technology, precisely regulates speed and compression ratio, with a pressure adjustment range of 2.0 to 5.0 MPa.
Thoughtful overall design
Design of a Multi-Stage Oil–Gas Separation System
Each compression stage is equipped with a dedicated oil–gas separation system, ensuring that the compressed air entering the next stage remains clean. A larger oil–gas separator cylinder helps maintain more stable system pressure and reduces the formation of lubricant foam. Additionally, an enlarged fine‑oil separation element increases the oil–gas separation surface area, further minimizing pressure drop.
Excellent ventilation design
The permanent‑magnet motor is located in the lower‑temperature section of the entire air‑compressor unit. Its dedicated motor intake air duct further reduces operating temperature, preventing high‑temperature demagnetization, thereby extending motor life and ensuring precise speed control. Both the electrical control cabinet and the variable‑frequency drive cabinet feature independent cooling air paths that draw in cooler ambient air to actively cool the cabinets, keeping the entire control system at an optimal operating temperature and guaranteeing reliable performance of the entire compressor unit.
High-performance cooling system
The water‑cooled cooler features a robust, high‑capacity design with water flowing inside the tubes and air passing outside. This configuration not only ensures easy cleaning but also delivers optimal cooling performance. Its straight‑through tube design allows compressed air to pass with virtually no pressure loss.
Air-cooled heat exchangers feature a larger heat-transfer surface area for improved cooling efficiency and reduced fan noise; they also offer lower airflow resistance, enhancing sensor performance and minimizing the temperature difference between incoming and outgoing air.
High-efficiency intake valve
It integrates functions such as backflow prevention and oil shut-off, and can also perform intake air volume control; its large‑diameter, low‑pressure‑drop design enhances suction efficiency.
Oil-mist pressure relief
Equipped with an oil‑mist‑proof pressure relief device, this system not only maintains normal pressure within the oil tank but also prevents oil mist from entering the unit, thereby avoiding hydrocarbon contamination of the machine room air and ensuring cleanliness both inside the unit and in the working environment.
Reliable high-pressure section protection
The high-pressure-stage compressor is equipped with a dedicated bypass protection for the air filter. At startup, when the high-pressure stage has not yet been able to draw in compressed air processed by the low-pressure stage, this device ensures normal oil injection and start-up, thereby preventing the high-pressure rotor from seizing.
Worry-free low-pressure-drop piping design
The design of internal piping and even the interfaces adheres to principles of high efficiency, low energy consumption, and low noise. A large‑diameter channel design keeps pressure drops in the hydraulic and pneumatic circuits within a significantly reduced range. Highly reliable material selection and assembly ensure leak‑free operation, enabling the entire unit to run with peace of mind.
Host Test Bench
A fully automated testing system that ensures reliable operation.
Equipped with a uniquely configured, intelligent, fully automated precision testing system, the company subjects both individual components and complete units to a series of rigorous tests. Products are delivered only after successfully passing a range of demanding simulated operating‑condition tests, ensuring that every Xunliyuan air compressor delivers reliable performance under all conceivable service conditions.
Host Testing: Overspeed, Overpressure, Overtemperature
System-level testing: operational performance under a variety of harsh operating conditions.
Large color display, easy-to-use smart control system
A clear, intuitive human–machine interface; supports multiple languages and delivers superior anti‑interference performance. Remote on/off functionality. RS485 communication enables sequential control of multiple units. Optional energy‑management module provides transparent, real-time energy‑consumption monitoring.
Modular design for enhanced scalability. Equipped with a CAN network communication interface. Optional 4G IoT control.
IoT Solution System
A | Remote monitoring | The air compressor’s equipment status and operating data can be remotely monitored via computer, smartphone, or tablet. |
B | Permission Management | Data and information for air compressor equipment can be managed with tiered access permissions. |
C | Remote Troubleshooting | Analyze fault information to help narrow down the scope of the issue, facilitate proactive preparation of solutions, and reduce labor costs. |
D | Fault Alert Function | When the air compressor equipment malfunctions, fault information is promptly communicated to relevant personnel via SMS, email, and system notifications, specifying the fault type and its cause. |
E | Maintenance services | Maintenance reminders can be customized based on the specific components being serviced and the urgency of the task. |
Features of Oil-Free, Water-Lubricated Products
Reliable | Environmental protection |
Absolute oil-free assurance. | No lubricants are used, thereby preventing environmental pollution. |
Energy conservation | Intelligence |
More than 15% more energy-efficient than dry-type oil-free compressors. | Auto start-stop function, automatic exhaust flow regulation, and self-protection against faults. |
PM VSD Light Oil Medium-Pressure Screw Air Compressor
| 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-35A3.0VD | 35 | 2.0~3.0 | 3.5 | 60 | DN25 | 1200 | 1850*1300*1600 |
| WZS-37A4.0VD | 37 | 3.5~4.0 | |||||
| WZS-40A3.0VD | 40 | 2.0~3.0 | 4.5 | 62 | DN25 | 1300 | 1850*1300*1600 |
| WZS-45A4.0VD | 45 | 3.5~4.0 | |||||
| WZS-50A3.0VD | 50 | 2.0~3.0 | 6 | 65 | DN40 | 1650 | 2300*1600*1700 |
| WZS-55A4.0VD | 55 | 3.5~4.0 | |||||
| WZS-70A3.0VD | 70 | 2.0~3.0 | 8.5 | 69 | DN40 | 1950 | 2300*1600*1700 |
| WZS-75A4.0VD | 75 | 3.5~4.0 | |||||
| WZS-85A/W3.0VD | 85 | 2.0~3.0 | 10.5 | 70 | DN50 | 2530 | 2650*1700*2040 |
| WZS-90A/W4.0VD | 90 | 3.5~4.0 | |||||
| WZS-100A/W3.0VD | 100 | 2.0~3.0 | 12 | 71 | DN50 | 2640 | 2650*1700*2040 |
| WZS-110A/W4.0VD | 110 | 3.5~4.0 | |||||
| WZS-120A/W3.0VD | 120 | 2.0~3.0 | 14 | 72 | DN50 | 2750 | 2650*1700*2040 |
| WZS-130A/W4.0VD | 130 | 3.5~4.0 | |||||
| WZS-140A/W3.0VD | 140 | 2.0~3.0 | 16 | 73 | DN50 | 3210 | 3100*1860*2100 |
| WZS-150A/W4.0VD | 150 | 3.5~4.0 | |||||
| WZS-155A/W3.0VD | 155 | 2.0~3.0 | 18 | 75 | DN65 | 3310 | 3100*1860*2100 |
| WZS-165A/W4.0VD | 165 | 3.5~4.0 | |||||
| WZS-175A/W3.0VD | 175 | 2.0~3.0 | 20 | 76 | DN65 | 4750 | 3100*1860*2100 |
| WZS-185A/W4.0VD | 185 | 3.5~4.0 | |||||
| WZS-190W3.0VD | 190 | 2.0~3.0 | 23 | 76 | DN65 | 4950 | 3900*2100*2150 |
| WZS-200W4.0VD | 200 | 3.5~4.0 | |||||
| WZS-200W3.0VD | 200 | 2.0~3.0 | 25 | 78 | DN65 | 5050 | 4450*2100*2150 |
| WZS-220W4.0VD | 220 | 3.5~4.0 | |||||
| WZS-220W3.0VD | 220 | 2.0~3.0 | 28 | 79 | DN80 | 5450 | 4450*2100*2150 |
| WZS-250W4.0VD | 250 | 3.5~4.0 | |||||
| WZS-250W3.0VD | 250 | 2.0~3.0 | 30 | 79 | DN80 | 6200 | 4750*2100*2250 |
| WZS-270W4.0VD | 270 | 3.5~4.0 | |||||
| WZS-300W3.0VD | 300 | 2.0~3.0 | 35 | 80 | DN80 | 6650 | 4750*2100*2250 |
| WZS-315W4.0VD | 315 | 3.5~4.0 | |||||
| WZS-340W3.0VD | 340 | 2.0~3.0 | 40 | 83 | DN100 | 6980 | 4950*2200*2250 |
| WZS-355W4.0VD | 355 | 3.5~4.0 | |||||
| WZS-380W3.0VD | 380 | 2.0~3.0 | 45 | 85 | DN100 | 7050 | 5100*2300*2350 |
| WZS-405W4.0VD | 405 | 3.5~4.0 | |||||
| WZS-420W3.0VD | 420 | 2.0~3.0 | 50 | 85 | DN100 | 7250 | 5100*2300*2350 |
| WZS-450W4.0VD | 450 | 3.5~4.0 |
Remarks:
1. In our model naming convention, WZS stands for oil-injected screw; A/W, air-cooled/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. Custom power supply can be realized. Please contact your sales representative for water-cooled units, units with different discharge pressures and other special requirements.
4. Final dimensions refer to the latest official drawings. We reserve the right to revise product specifications without prior notification.
Features:
Two-stage compression, continuous and stable delivery of clean air at 2–5 MPa; robust and easy to maintain; ideal for long-term, uninterrupted high-pressure air applications.
Applications:
Large‑capacity PET/PC blow‑molding, oil, gas, and energy industries, high‑pressure testing of pressure vessels and valves, aerospace and high‑end precision manufacturing, thermal power and new energy, chemical and advanced materials, marine and offshore equipment, mining and heavy construction machinery, fire‑fighting and specialized equipment, as well as large‑scale rubber, plastics, and tire manufacturing.
TPermanent Magnet VSD Light Oil Boosting Screw Air Compressor
| Model No. | Rated Power | Inlet Pressure | Inlet Air Flow | Outlet Pressure | Free Air Delivery (FAD) | Noise Level | Inlet/Outlet Pipe Size | Unit Weight | Overall Dimensions L*W*H |
| (kW) | MPa(A) | (m³/min) | (MPa) | (m³/min) | dB(A) | (EN) | (kg) | (mm) | |
| WZS-30A4.0VD | 30 | 0.8~1 | ≥10 | 2.0~4.0 | 6~9 | 60 | DN50/DN32 | 1600 | 2100*1200*1700 |
| WZS-37A4.0VD | 37 | 0.8~1 | ≥12.5 | 2.0~4.0 | 7.5~11 | 62 | DN50/DN40 | 1700 | 2100*1200*1700 |
| WZS-45A4.0VD | 45 | 0.8~1 | ≥15 | 2.0~4.0 | 9~13.5 | 62 | DN50/DN40 | 1800 | 24.0*14.0*2050 |
| WZS-55A4.0VD | 55 | 0.8~1 | ≥19 | 2.0~4.0 | 11~17 | 65 | DN65/DN50 | 2000 | 24.0*14.0*2050 |
| WZS-75A4.0VD | 75 | 0.8~1 | ≥25 | 2.0~4.0 | 15~22.5 | 69 | DN65/DN50 | 2350 | 2800*1650*2080 |
| WZS-90W4.0VD | 90 | 0.8~1 | ≥30 | 2.0~4.0 | 18~27 | 70 | DN65/DN65 | 2600 | 2800*1650*2080 |
| WZS-110W4.0VD | 110 | 0.8~1 | ≥36.5 | 2.0~4.0 | 21.5~33 | 71 | DN80/DN65 | 3250 | 3150*1850*2100 |
| WZS-132W4.0VD | 132 | 0.8~1 | ≥43 | 2.0~4.0 | 25~39 | 72 | DN80/DN65 | 3450 | 3150*1850*2100 |
| WZS-160W4.0VD | 160 | 0.8~1 | ≥55 | 2.0~4.0 | 30~50 | 75 | DN100/DN65 | 3560 | 3550*1900*2100 |
| WZS-185W4.0VD | 185 | 0.8~1 | ≥62 | 2.0~4.0 | 36~56 | 76 | DN100/DN80 | 3750 | 3550*1900*2100 |
Remarks:
1. In our model naming convention, WZS stands for oil-injected screw; A/W, air-cooled/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. Custom power supply available. Please contact your sales representative for water-cooled units, units with different discharge pressures and other special demands.
4. A PM VSD air compressor is recommended for upstream installation. Inlet air temperature ≤40°C, inlet solid particles ≤1μm. Cooling type can be customized according to customer requirements.
Final dimensions refer to the latest official drawings. We reserve the right to revise product specifications without prior notification.
PM VSD Water-injected Oil-free Boosting Screw Air Compressor
| Model No. | Rated Power | Inlet Pressure | Inlet Air Flow | Outlet Pressure | Free Air Delivery (FAD) | Lubricating Water Flow | Cooling Water Flow | Noise Level | Inlet/Outlet Pipe Size | Unit Weight | Overall Dimensions L*W*H |
| (kW) | MPa(A) | (m³/min) | (MPa) | (m³/min) | (L/min) | (m³/h) | dB(A) | (EN) | (kg) | (mm) | |
| WZS-30W3.0VD | 30 | 0.8~1 | ≥10 | 2.0~3.0 | 6~9 | 73.71 | 6.19 | 65 | DN50/DN32 | 2550 | 2000*1250*1600 |
| WZS-30W4.0VD | ≥12.5 | 3.5~4.0 | 7.5~11 | DN50/DN40 | |||||||
| WZS-37W3.0VD | 37 | 0.8~1 | ≥15 | 2.0~3.0 | 9~13.5 | 90.91 | 7.64 | 65 | DN50/DN40 | 2600 | 2000*1250*1600 |
| WZS-37W4.0VD | ≥19 | 3.5~4.0 | 11~17 | DN65/DN50 | |||||||
| WZS-45W3.0VD | 45 | 0.8~1 | ≥25 | 2.0~3.0 | 15~22.5 | 110.57 | 9.29 | 68 | DN65/DN50 | 2650 | 2200*1380*1800 |
| WZS-45W4.0VD | ≥30 | 3.5~4.0 | 18~27 | DN65/DN65 | |||||||
| WZS-55W3.0VD | 55 | 0.8~1 | ≥36.5 | 2.0~3.0 | 21.5~33 | 135.14 | 11.35 | 68 | DN80/DN65 | 2750 | 2200*1380*1800 |
| WZS-55W4.0VD | ≥43 | 3.5~4.0 | 25~39 | DN80/DN65 | |||||||
| WZS-75W3.0VD | 75 | 0.8~1 | ≥55 | 2.0~3.0 | 30~50 | 184.29 | 15.48 | 72 | DN100/DN65 | 2850 | 2200*1380*1800 |
| WZS-75W4.0VD | ≥62 | 3.5~4.0 | 36~56 | DN100/DN80 | |||||||
| WZS-90W3.0VD | 90 | 0.8~1 | ≥10 | 2.0~3.0 | 6~9 | 221.14 | 18.58 | 72 | DN50/DN32 | 3200 | 2500*1600*1800 |
| WZS-90W4.0VD | ≥12.5 | 3.5~4.0 | 7.5~11 | DN50/DN40 | |||||||
| WZS-110W3.0VD | 110 | 0.8~1 | ≥15 | 2.0~3.0 | 9~13.5 | 270.29 | 22.70 | 75 | DN50/DN40 | 3350 | 2500*1600*1800 |
| WZS-110W4.0VD | ≥19 | 3.5~4.0 | 11~17 | DN65/DN50 | |||||||
| WZS-132W3.0VD | 132 | 0.8~1 | ≥25 | 2.0~3.0 | 15~22.5 | 324.34 | 27.24 | 75 | DN65/DN50 | 3450 | 2500*1600*1800 |
| WZS-132W4.0VD | ≥30 | 3.5~4.0 | 18~27 | DN65/DN65 | |||||||
| WZS-160W3.0VD | 160 | 0.8~1 | ≥36.5 | 2.0~3.0 | 21.5~33 | 393.14 | 33.02 | 80 | DN80/DN65 | 4500 | 3000*2000*1800 |
| WZS-160W4.0VD | ≥43 | 3.5~4.0 | 25~39 | DN80/DN65 | |||||||
| WZS-185W3.0VD | 185 | 0.8~1 | ≥55 | 2.0~3.0 | 30~50 | 454.57 | 38.18 | 80 | DN100/DN65 | 5000 | 3000*2000*1800 |
| WZS-185W4.0VD | ≥62 | 3.5~4.0 | 36~56 | DN100/DN80 |
Remarks:
1. In our model naming convention, WZS stands for oil-injected screw; 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. Custom power supply available. Please contact your sales representative for water-cooled units, units with different discharge pressures and other special demands.
4. A PM VSD air compressor is recommended for upstream installation. Inlet air temperature ≤40°C, inlet solid particles ≤1μm. Cooling type can be customized according to customer requirements.
5. Final dimensions refer to the latest official drawings. We reserve the right to revise product specifications without prior notification.
Air-cooling system flowchart
Water Cooling System Flowchart
Schematic diagram of two-stage compression
Compressed Air Purification System
1. Suitable for general machinery, welding, mining, and other applications; compliant with ISO 8573-1:3–4.
2. Suitable for general workshops, pneumatic tools, sandblasting, and similar applications; compliant with ISO 8573‑1:2010.
3. Suitable for food, beverages, electrostatic coating, precision control valves, and more; compliant with ISO 8573.1:1–1.
4. Suitable for food, beverages, medical applications, clean and sterile laboratories, automated technological equipment, and the precision electronics industry; compliant with ISO 8573.1:1–1.
Q-grade stainless steel filter | Coalescing Ceramic Filter Cartridge Removes 3-μm water molecules and solid particulates from heavy rain. Oil content is less than 3 ppm. |
S-grade stainless steel filter | Coalescing Glass Fiber Filter Cartridge Removes water molecules and solid particulates larger than 0.01 μm. Oil content is less than 0.011 ppm. |
Grade C stainless steel filter | Sterilizing Activated Carbon Filter Cartridge Removes water molecules and solid particulates larger than 0.003 μm. Oil content is less than 0.003 ppm. |
T-grade stainless steel filter | Deodorizes and provides deep filtration with a PTFE filter element. Removes water molecules and solid particles larger than 0.001 μm. Oil content is less than 0.001 ppm. |
Customer visit
Packaging and shipping
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Contact Us
Email: info@wzscompressor.com
Landline: 0086-21-39193352
WhatsApp: 8613381795589
Address: Bldg. 6, No.625 Rongchang Rd., Lvxiang Town, Jinshan District, Shanghai, China
Postal code: 201518
