Explore our state-of-the-art permanent magnet variable speed drive (PM VSD) systems engineered for maximum energy efficiency, lower operating noise, and long-term reliability.
Engineered for large-scale industrial operations, this direct-drive rotary screw air compressor covers a wide power range from 7.5kw to 535kw. Operating at multi-pressure stages (7/8/10/13bar) to match your precise application requirements.
See product details >
Designed for critical applications in food, medical, and electronics industries. Water lubrication ensures absolutely zero oil carryover, providing 100% clean compressed air at ultra-low noise levels.
See product details >
Leverages two-stage compression principles to significantly reduce internal pressure ratios. Paired with a PM VFD motor, it delivers outstanding energy reductions and improves volumetric efficiency.
See product details >
High-capacity 315kw model certified for Level 1 energy consumption standards. Features a permanent magnet synchronous motor that scales down electrical consumption during partial load operations.
See product details >
An economical yet highly reliable VSD solution ranging from 7.5kw to 132kw. Incorporates advanced frequency inverters to regulate speed in real-time, eliminating unloaded power waste.
See product details >
Equipped with a synchronized double-screw airend profile and a permanent magnet variable speed drive motor, ensuring optimized torque distribution and massive electricity savings.
See product details >
Compact integrated design containing the screw air compressor unit and frequency controllers, minimizing field installation footprint while delivering high efficiency.
See product details >
Features advanced oil-cooling technology integrated into a permanent magnet scroll compressor system. Highly silent operation with near-constant discharge pressures for small-to-medium clean-air applications.
See product details >Industrial manufacturing facilities operate under fluctuating compressed air demands. Traditional fixed-speed air compressors utilize standard induction motors that load and unload, consuming up to 70% of their full-load power even when running completely idle. This cycle is an immense source of energy waste. Variable Frequency Drive (VFD) rotary screw compressors, particularly those featuring Permanent Magnet (PM) synchronous motors, adjust their rotational speeds dynamically to match real-time demand. This eliminates unload cycles, reduces system pressure variation to ±0.1 bar, and delivers energy savings of 35% to 50%.
By pairing high-precision twin-screw air ends with Permanent Magnet Variable Speed Drive (PM VSD) motors, manufacturers achieve unparalleled performance. The integration of oil-cooled permanent magnet motors removes traditional transmission components like gearboxes and couplings. This direct-drive alignment ensures a mechanical efficiency rating close to 100%, while also reducing maintenance downtime.
Our twin-screw airends incorporate optimized 5:6 asymmetrical rotor profiles. This profile maximizes the compression chamber's volume while minimizing internal backflow leakage, ensuring stable displacement and low specific power consumption across the entire operational range.
High-performance frequency inverters analyze network pressures thousands of times per second. Motor speeds adapt instantaneously to prevent pressure drops or over-pressurization, providing a steady air supply to the downstream production processes.
Utilizing high-grade Neodymium permanent magnets (NdFeB), our PM motors offer superior efficiency compared to standard induction units. Cooled directly by the compressor's lubricant oil, these motors maintain optimal operational temperatures, preventing demagnetization even under heavy loads.
Sourcing air compressors from China offers global enterprises distinct structural advantages. The Yangtze River Delta cluster houses the world's most dense ecosystem of high-precision machine tool manufacturers, rotor casting foundries, and advanced electrical component suppliers. This local integration reduces transit times for raw materials and enables rapid implementation of engineering changes.
At Shanghai Honest Compressor Co., Ltd., we utilize this centralized supply chain to produce world-class twin-screw systems. By maintaining in-house design engineering, direct control over stator winding, rotor grinding, assembly, and strict multi-point QA checks, we offer OEM and ODM partners premium equipment at highly competitive price-to-performance ratios.
Understanding the technical challenges of global deployment, we tailor our variable frequency air compressors to local electrical infrastructure and environmental demands.
Our VFD systems accommodate diverse global grids: 380V/50Hz (Asia & Europe), 460V/60Hz (North America), and 220V single-phase systems (for light commercial areas). Our variable frequency drives act as active voltage stabilizers to protect delicate electronic elements from local power variations.
Designed with IP54 and IP55 protection ratings, our electrical cabinets and motors prevent the ingress of dust and moisture. This renders them highly suitable for harsh mining operations, tropical manufacturing zones, and high-humidity textile mills.
All VFD systems conform to strict international directives: CE certificates for the European market, ASME pressure vessel standards for North American regions, and ISO9001 quality management guidelines to ensure consistent factory performance.
Shanghai Honest Compressor Co., Ltd. is a British-owned enterprise founded in early 2004. Our primary manufacturing facility is located at NO. 355 Jiajian Branch Road, Malu Town, Jiading District, Shanghai, China. We have grown into one of China's largest engineering and manufacturing enterprises specializing in high-performance twin-screw air compressors, as well as a leading developer of custom air system solutions.
We provide a comprehensive catalog of compression products, including piston air compressors (low, medium, and high pressure; oil-free configurations), and full rotary screw systems (spanning 3KW to 480KW). Our portfolio also covers gas separation systems, refrigeration equipment, refrigerated dryers, filters, ceramic membrane filtration setups, and complete OEM/ODM consumables support.
Read more about us >To showcase our technological innovations and keep pace with evolving industrial standards, we actively participate in global exhibitions and trade shows. Our engineers present our latest permanent magnet synchronous variable speed technology and discuss thermodynamic trends with industry peers.
By engaging with engineers worldwide, we gain insights into local application scenarios. This feedback loop allows us to customize control software, optimize cooling fans, and improve mechanical designs to better serve clients across different climates and sectors.
According to MRFR analysis, the dry vacuum pump market size is valued at US$ 5.97 billion in 2024. The dry vacuum pump market is expected to grow from US$ 6.17 billion in 2025 to US$ 8.28 billion in 2034, registering continuous double-digit expansion across various production sectors.
A closer look at the technical configurations of our primary air ends and integrated compressor modules.
Combines the rotary screw air compressor, refrigerated air dryer, precise filters, and air receiver tank in a single compact frame. Maximizes usable workspace.
See more products >
Engineered with dry-type oil-free screw rotors. Prevents compressed air contamination without lubricating fluids. Ideal for chemical and pharmaceutical applications.
See more products >
Heavy-duty 280kw configuration delivering high flow volumes of certified oil-free air. Built with sound-dampening enclosures to minimize factory floor decibels.
See more products >
Uses primary and secondary rotor setups to distribute compression ratios evenly, lowering thermodynamic loads and significantly enhancing mechanical longevity.
See more products >
Compact, base-mounted twin-screw system. Merges electrical speed control with a rugged air end for small workshop settings.
See more products >
Incorporates dual filtration blocks and refrigeration drying systems, providing immediate dry, clean industrial air straight out of the box.
See more products >
High-capacity industrial unit designed for 24/7 continuous operation. Excellent heat dissipation and low energy metrics.
See more products >
Engineered for heavy-duty applications. Dual-stage compression rotors deliver high volumetric efficiency at a low specific power input.
See more products >
A dependable, fixed-speed model designed for steady-load manufacturing plants where consistent volume output is required.
See more products >
Integrated explosion-proof design. Super silent system with 1-year whole-machine warranty, ISO and CE certified. Ideal for noise-sensitive operating sites.
See more products >
Model XD-8A, providing free air delivery of 0.8-1.2m3/min at 7-12bar. Features automatic PLC controller, direct driven elastic coupling, and low noise operations under 63dB(A).
See more products >
Two-stage compression oil injection system with optimized pressure ratios and minimal leakage. Promotes better line speed matching for enhanced energy balance.
See more products >Our permanent magnet variable frequency compressor units are deployed across various industries worldwide, tailored to meet precise operating demands.
Automotive production lines require variable compressed air flows for pneumatic tooling, painting, and clamping. Our VSD compressors adjust output dynamically, preventing line pressure drops while saving energy during shift changes and tool idle times.
Silicon wafer production requires high air purity. By utilizing our water-lubricated oil-free screw air compressors alongside refrigerated air dryers, fabs ensure zero hydrocarbon contamination and reliable dew points down to ISO Class 0/Class 1 air quality standards.
Air-jet weaving looms consume large volumes of continuous compressed air. The dust-heavy environment of textile mills demands robust IP54-rated motor casings and multi-stage air intake filters to prevent internal contamination and maintain cooling efficiency.
Detailed answers to common technical, electrical, and maintenance questions from project engineers and procurement departments.
Browse our complete range of specialized low-pressure screw compressors, high-protection industrial air ends, and refrigerated dryers.
Protects downstream equipment from moisture. Uses eco-friendly refrigerants to achieve a stable pressure dew point of 2-10°C, preventing pipeline corrosion.
See product details >
Designed for applications requiring lower pressures (3bar to 5bar), such as glass manufacturing and wastewater aeration, reducing energy consumption compared to standard 7-bar compressors.
See product details >
Equipped with IP55-rated enclosures and a 55kw motor. The two-stage compression design minimizes internal leakage and optimizes thermal efficiency under continuous loads.
See product details >
A single-phase 220V variable frequency PM compressor suitable for smaller facilities and workshops, providing industrial-grade screw compression without three-phase power constraints.
See product details >
Designed for baseload applications with constant air demand. Ranges from 7.5kw to 400kw, delivering high volumetric reliability and simplified maintenance schedules.
See product details >
A popular 15kw (20hp) model suited for small-to-medium manufacturing plants. Offers low noise levels and high durability in a compact footprint.
See product details >
Heavy-duty 132kw compressor engineered for demanding mining and industrial applications. Features two-stage compression to maximize output per kilowatt consumed.
See product details >
Combines two-stage air ends with direct-driven motor alignments. High-efficiency air-cooling system ensures stable discharge temperatures in hot climates.
See product details >