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Single-stage Permanent Magnet Variable Speed Drive Rotary Screw Air Compressor (high‑spec model, IP23/IP65)

Rated Power: 7.5~75 kW Discharge Pressure: 0.8~1.25 MPa Free Air Delivery: 0.8~13.2 m³/min

Product Introduction

Single-stage Permanent Magnet Variable Speed Drive Rotary Screw Air Compressor (high‑spec model, IP23/IP65)

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; 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 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; 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, ensuring 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. 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.

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 IP23 high-efficiency split-type permanent magnet motor

High-efficiency, semi‑closed, air‑cooled permanent‑magnet variable‑frequency motor with an IP23 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, this unit boasts a compact footprint—typically about one‑third that of a conventional motor.

High-efficiency IP65 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 internal design for enhanced stability; winding vacuum epoxy potting for rapid heat dissipation, high efficiency, and superior insulation strength; dual‑layer housing with helical cooling channels, reducing motor vibration, noise, and temperature rise; stator core made from 35WW360 silicon steel, optimized for low eddy‑current losses at high frequencies and delivering high efficiency.

High-efficiency, energy-saving filtration system

High-efficiency oil–gas separator, featuring a compact 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-7.5A/W0.8VD	7.5	0.8	1.1	60±2	3/4	200	8007841110
WZS-7.5A/W1.0VD		1	1
WZS-7.5A/W1.25VD		1.25	0.8
WZS-11A/W0.8VD	11	0.8	1.6	62±2	1	260	10508001080
WZS-11A/W1.0VD		1	1.4
WZS-11A/W1.25VD		1.25	1.2
WZS-15A/W0.8VD	15	0.8	2.2	63±2	1	380	10508001080
WZS-15A/W1.0VD		1	2
WZS-15A/W1.25VD		1.25	1.7
WZS-22A/W0.8VD	22	0.8	3.8	66±2	1 1/4	420	11108001140
WZS-22A/W1.0VD		1	3.2
WZS-22A/W1.25VD		1.25	2.9
WZS-30A/W0.8VD	30	0.8	5	68±2	1 3/4	600	11108001140
WZS-30A/W1.0VD		1	4.4
WZS-30A/W1.25VD		1.25	3.7
WZS-37A/W0.8VD	37	0.8	6.2	68±2	1 1/2	700	12109101290
WZS-37A/W1.0VD		1	5.7
WZS-37A/W1.25VD		1.25	5.1
WZS-45A/W0.8VD	45	0.8	7.7	68±2	1 1/2	780	12109101290
WZS-45A/W1.0VD		1	7
WZS-45A/W1.25VD		1.25	5.8
WZS-55A/W0.8VD	55	0.8	10.5	69±2	2 1/2	1350	180012701500
WZS-55A/W1.0VD		1	8.7
WZS-55A/W1.25VD		1.25	7.5
WZS-75A/W0.8VD	75	0.8	13.2	70±2	2 1/2	1470	205012701550
WZS-75A/W1.0VD		1	11.6
WZS-75A/W1.25VD		1.25	9.8

Remarks:

1. In this model naming convention, WZS stands for oil-injected screw IP23/65 high-end version; A/W, IP23 air-cooled/IP65 oil-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, 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

Single-stage Permanent Magnet Variable Speed Drive Rotary Screw Air Compressor (standard configuration: IP23/IP65)

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