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Single-stage Permanent Magnet Variable Speed Drive Rotary Screw Air Compressor (IP55)

Rated Power: 7.5~250 kW Discharge Pressure: 0.8~1.25 MPa Free Air Delivery: 0.8~42 m³/min

Product Introduction

Single-stage Permanent Magnet Variable Speed Drive Rotary Screw Air Compressor (IP55)

Product Features

New generation high-efficiency screw compressor airend

A new energy-saving helical gear profile technology; a novel 5:6 asymmetric rotor tooth profile; equipped with a Leitz high-precision three‑coordinate measuring machine, delivering superior machining accuracy, minimal vibration, and low noise. It utilizes original Swedish‑imported SKF tapered roller bearings; compared to conventional models, it achieves energy savings of 2%–5% or more over similar products on the market.

WZS Smart IoT Control System

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 field faults; stores and retrieves information on the types and occurrence times of historical faults; 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 it 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, 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. It also incorporates integrated fan and motor dual‑vector variable‑frequency control technology.

Efficient and powerful cooling system

Air-cooled units feature an optimized, oversized finned‑tube cooling system that delivers high heat‑dissipation efficiency, ensuring continuous operation even in high‑temperature, high‑humidity conditions and enhancing overall machine performance and stability. (Water‑cooled units available as an option.) These units are equipped with horizontal shell-and-tube condensers; the copper core can be removed separately for easy cleaning, while the inner tubes—made of stainless steel or red copper—are highly corrosion‑resistant, making them suitable for harsh operating environments.

Air-cooled IP55 high-efficiency split-type permanent magnet motor

High-efficiency, semi‑enclosed, air‑cooled permanent‑magnet variable‑frequency motor with an IP55 protection rating. The high‑efficiency permanent‑magnet motor and the screw rotor are integrated via an internal, one‑piece shaft‑direct‑drive configuration, achieving a transmission efficiency approaching 100%. With no gearbox, no belts, and no losses in transmission efficiency, the unit boasts a compact footprint—typically about one‑third that of a conventional motor.

High-efficiency oil-cooled integrated permanent magnet motor

IP65 oil‑cooled permanent‑magnet synchronous motor; vacuum epoxy potting process; 38UH permanent magnets with a theoretical temperature rating of 180°C; integrated design for enhanced stability; vacuum epoxy encapsulation of the windings ensures rapid heat dissipation, high efficiency, and superior dielectric strength; dual‑layer housing with helical cooling channels reduces motor vibration, noise, and temperature rise; the stator core is made from 35Ww360 silicon steel, offering excellent performance at high frequencies with low losses and high efficiency.

High-efficiency, energy-saving filtration system

High-efficiency oil–gas separator, featuring a compact, streamlined design, a coalescing separation element, and an oil‑return system; service life of 6,000 hours. Oil filter with low‑pressure drop design, offering a service life of up to 4,000 hours; its high filtration accuracy effectively protects bearings and the screw compressor rotor. Air filter that, during filtration, does not alter the airflow direction—air passes directly through the filter media, minimizing pressure loss and delivering greater energy efficiency than conventional air filters. It boasts a larger filtration area, higher precision, and an extended service life.

Technical Specifications

Model No.	Rated Power	Discharge Pressure	Free Air Delivery (FAD)	Noise Level	Outlet Pipe Size	Unit Weight	Overall Dimensions LWH
	(kW)	(MPa)	(m³/min)	dB(A)	(EN)	(kg)	(mm)
WZS-7.5A0.8VD	7.5	0.8	1.1	60±2	3/4	240	8007841110
WZS-7.5A1.0VD		1	0.9
WZS-7.5A1.25VD		1.25	0.8
WZS-11A0.8VD	11	0.8	1.6	62±2	1	400	10808541290
WZS-11A1.0VD		1	1.4
WZS-11A1.25VD		1.25	1.2
WZS-15A0.8VD	15	0.8	2.2	63±2	1	410	10808541290
WZS-15A1.0VD		1	2
WZS-15A1.25VD		1.25	1.8
WZS-22A0.8VD	22	0.8	3.5	66±2	1 1/4	620	12008501170
WZS-22A1.0VD		1	3.2
WZS-22A1.25VD		1.25	2.9
WZS-30A0.8VD	30	0.8	5	68±2	1 3/4	680	13808501150
WZS-30A1.0VD		1	4.3
WZS-30A1.25VD		1.25	3.7
WZS-37A0.8VD	37	0.8	6.2	68±2	1 1/2	840	130010541410
WZS-37A1.0VD		1	5.7
WZS-37A1.25VD		1.25	5.1
WZS-45A0.8VD	45	0.8	7.7	68±2	1 1/2	890	160010001370
WZS-45A1.0VD		1	7
WZS-45A1.25VD		1.25	6.2
WZS-55A0.8VD	55	0.8	10.5	69±2	2 1/2	1735	180012701500
WZS-55A1.0VD		1	9.8
WZS-55A1.25VD		1.25	7.5
WZS-75A0.8VD	75	0.8	13.3	70±2	2 1/2	1850	205012701550
WZS-75A1.0VD		1	11.6
WZS-75A1.25VD		1.25	10.6
WZS-90A0.8VD	90	0.8	15	70±2	2 1/2	1920	205012701550
WZS-90A1.0VD		1	14.6
WZS-90A1.25VD		1.25	12.3
WZS-150A0.8VD	110	0.8	19	71±2	DN65	3000	8275017501900
WZS-150A1.0VD		1	17
WZS-150A1.25VD		1.25	14.6
WZS-132A0.8VD	132	0.8	23	72±2	DN80	3100	275017501900
WZS-132A1.0VD		1	20
WZS-132A1.25VD		1.25	18
WZS-160A0.8VD	160	0.8	26.5	75±2	DN100	3200	295018001850
WZS-160A1.0VD		1	22.5
WZS-160A1.25VD		1.25	20.1
WZS-185A0.8VD	185	0.8	31	85±2	DN100	3470	300020002100
WZS-185A1.0VD		1	28
WZS-185A1.25VD		1.25	25
WZS-200A0.8VD	200	0.8	33.5	85±2	DN100	4200	3002002100
WZS-200A1.0VD		1	21
WZS-200A1.25VD		1.25	28
WZS-220A0.8VD	220	0.8	36.8	85±2	DN125	4500	320021002450
WZS-220A1.0VD		1	32.2
WZS-220A1.25VD		1.25	28.5
WZS-250A0.8VD	250	0.8	42	85±2	DN125	4600	320021002450
WZS-250A1.0VD		1	38.8
WZS-250A1.25VD		1.25	34.6

Remarks:

1. In our model naming convention, WZS stands for oil-injected screw; A, air-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. Motor Protection Class IP55. 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.

4. 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 and windows 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.

Keywords:

Single-stage Permanent Magnet Variable Speed Drive Rotary Screw A

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