Internal Structure Frontside
Internal Structure Backside
Working Principle
In an ideal air compression journey, the power required for single-stage pressure transmission mirrors the sum needed for multi-stage compression. However, real-world conditions introduce complexities like coupling transmission power loss, bearing friction, and the cooling effects of liquid viscosity, resulting in higher actual working power. By optimizing the compression ratio of each stage, we can minimize these losses, making the total power required for multi-stage compression significantly less than that for single-stage compression.
Our state-of-the-art two-stage screw air compressor features a sophisticated two-stage rotary screw compressor system. Each stage comprises both an active and a passive screw, with the active screw driving the passive one via an external power transmission device. The first stage utilizes a low-pressure rate screw group, while the second stage employs a high-pressure rate screw group. These screws are enveloped by a sealing air film, and as they rotate, the gas undergoes three critical processes: suction, pressurization, and exhaust.
First Stage Compression: The initial stage employs a low-pressure rate screw group, where gas is captured between the screws. The gas is drawn into the screw compression chamber through the suction valve. The high-speed rotation of the screw rotor compresses the gas, progressively transferring it to the second stage.
Second Stage Compression: In the more compressed environment of the second stage screw group, gas enters a tighter screw space and is subjected to even higher temperature and pressure. The exhaust valve then opens, efficiently releasing the high-pressure gases from the system.
Natural air initially enters the first compression stage via the air filter, where it mixes with a small amount of lubricating oil in the compression chamber. The mixed gas is compressed to interstage pressure, enters the cooling channel, and encounters a large amount of oil mist, significantly lowering its temperature. This cooled, compressed gas then enters the second-stage rotor, undergoes two-stage compression to reach the final exhaust pressure, and is ultimately discharged through the exhaust valve, completing the entire compression process.
Our water-cooled compressors stand out by utilizing water as the cooling medium, providing a dual benefit: lubrication and longevity for friction-prone parts. As the cooling water courses through the compressor, it sweeps away heat from the cylinder and the compressed gas, effectively lowering exhaust temperatures and power consumption. This translates to significant operating cost reductions. Note: proper maintenance is necessary to manage potential scaling within the water cooling system.
1) Superior PM Motor Efficiency:With an expansive constant torque and weak magnetic range, our permanent magnet motor outperforms regular motors by 20-30%. Remarkably, even when operating outside the rated frequency, the motor maintains its high efficiency, ensuring optimal performance at all times.
2) Maintenance-Free Motor:Designed without internal bearings, our permanent magnet motor eliminates bearing maintenance and replacement costs, delivering hassle-free operation.
3) Integrated Frequency Converter: Employing China's top-tier frequency system, our converter offers a broad speed regulation range with exceptional precision. It dynamically adjusts to the user's gas demand, ensuring superb energy savings.
4) Zero Transmission Loss: Our design features a direct-connection structure between the permanent magnet motor and compressor, enhancing compactness. With no couplings or transmission parts, we achieve 100% transmission efficiency.
5) Variable Frequency and Soft StartOur motor's variable frequency start and soft start capabilities significantly reduce impact on power grid equipment, ensuring no harm to electrical systems.
6) Enhanced Energy Efficiency: Our system's frequency conversion ranges from 25% to 100%, compared to 50% to 100% in ordinary systems. This distinction enables up to 30% more energy savings over fixed-speed compressors and approximately 5% over standard variable frequency models. The greater the fluctuation in system gas consumption, the more pronounced the energy savings.
7) Innovative Two-Stage Compression Air End:Our uniquely designed two-stage compression air end integrates the first and second-stage compression rotors within a single casing, driven directly by gears. This setup ensures each rotor operates at optimal linear speeds, significantly boosting compression efficiency.
8) Advanced Internal Spray Curtain Cooling: Our high-efficiency internal spray curtain cooling method significantly reduces compressed air temperatures, achieving near-isothermal compression. This decreases pressure loss between stages, enhances compression efficiency, and improves overall performance.
9) Minimized Internal Leakage:By adopting two-stage compression, we reduce each stage's compression ratio, cutting down internal leakage from high to low-pressure ends and boosting volumetric efficiency.
10) Noise Reduction:Two-stage compression lowers the compression ratio, resulting in a substantial noise reduction, particularly during unloading.
11) Simplified Maintenance and Servicing:Our two-stage compressor unit's design mirrors that of single-stage systems, except for the air end, ensuring ease of maintenance and user convenience.
1. Price Advantage
Gain the upper hand with our factory-direct pricing, ensuring you remain competitive in the market.
2. Direct Deal
Experience unparalleled value as all our products come straight from the factory, offering you unmatched cost-effectiveness.
3. OEM & ODM Services
Harness our robust production and management capabilities to avail bespoke OEM and ODM services tailored for you.
4. Customized Service
Embrace flexibility with our acceptance of non-standard, export, and custom orders, including voltage, power, and pressure specifications. Reach out with your specific requirements.
5. Accept Small Orders
Initiate with a small trial order and evaluate the superior quality of our products before making larger commitments.
6. Fast Delivery
Expect premium quality products delivered to you promptly and efficiently.
7. Complete Authorization
For our valued distributors, we provide full authorization certificates, empowering you to sell our esteemed SANZHI brand products.
Sanzhi (Henan) Compressor Co., Ltd is a seasoned manufacturer specializing in the production of screw air compressors and screw vacuum pumps, boasting over a decade of industry expertise. Our comprehensive product portfolio features an array of options including normal pressure/low-pressure screw air compressors, permanent magnet frequency conversion screw air compressors, two-stage compression screw air compressors, screw air compressors for laser cutting, single-tank mobile screw air compressors, double-tank mobile screw air compressors, electric mobile screw air compressors, diesel mobile screw air compressors, and screw vacuum pumps.
Our production process leverages highly efficient multi-air compressor assembly lines, designed to be both lean and modern. With the dedication of over 50 skilled employees, we continually refine our management systems, including ERP, to minimize lead times and ensure the rapid delivery of high-quality products.
In management, our factory has earned the prestigious ISO9001 quality management system certification. We steadfastly adhere to rigorous quality management protocols, meticulously implementing standardized quality control procedures. Each machine undergoes a comprehensive inspection process, including material inspection, production inspection, and pre-delivery inspection, ensuring impeccable quality.
Our customer service is exemplary. In pre-sales, we provide expert guidance to help customers select the ideal air equipment for their specific needs, offering extensive customization options in appearance and configuration. We can also tailor unique products to meet dealers' specific requirements through OEM services. For after-sales support, our professional sales and service team is committed to delivering swift and effective responses to customer inquiries.
At Sanzhi (Henan) Compressor Co., Ltd, we are dedicated to delivering superior, stable products, and fostering long-term relationships with our customers. Our commitment to efficient delivery, high-quality machines, and competitive pricing makes us a trusted partner for all your compressed air solutions.
Our factory is conveniently located in Xinzheng City, Henan Province, China. We are pleased to offer transportation from Xinzheng International Airport to our factory, a journey of approximately one hour covering 30 kilometers. We warmly welcome you to visit our company and explore our offerings firsthand!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a professional manufacturer of screw air compressors, with more than 10 years of experience.
Q2. How do you control quality?
A: 1. The raw materials are strictly inspected.
2. Installation procedures are strictly controlled.
3. Each machine must pass at least 5 hours of continuous testing before leaving the factory.
Q3. What information must I provide to get the suitable machine?
1. How much air delivery capacity (Unit: CFM or m³/Min)
2. How much working pressure (Unit: PSI, Bar or Mpa)
3. What is the voltage and frequency of my country of residence (V/Hz)
4. Whether I need other accessories such as an air tank, filters, and/or air dryers.
Tell us the answer, we will offer a scheme for you!
Q4. What is the general unit conversion?
1Bar = 0.1Mpa = 14.5PSI
1m³/min = 35.32cfm
1KW = 1.34HP
Q5. What is the available voltage air compressor?
A: Sanzhi available voltage include 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, 440v/60hz/3p, and can be customized according to your requirements.
Q6. How long is the delivery time?
A: For standard voltage,15 working days after the confirmed order. Non-standard, please contact our sales.
Q7. What's the payment term?
A: 30% T/T in advance, 40% T/T before shipment, and 30% T/T against the B/L copy. USD, RMB can be accepted.
Q8. How about your warranty?
A: One year for the whole machine and two years for screw air compressor, except for consumable spare parts.
Q9. What about the maintenance?
A: First maintenance needs to be done after 500 hours, and then every 2000-3000 hours to do the normal maintenance, and consider the actual environment.
Q10. Can machines be run in high-temperature environment?
A: Yes, machines would run in high-temperature environment countries. Working temperature from -20° to 45°(-4ºF-113ºF).
Q11. Do you offer OEM service?
A: Yes, with a professional design team, both OEM & ODM orders are highly welcome.
Q12. How long could your air compressor be used?
A: Generally, more than 10 years.
Q13. Will you provide some spare parts for the machines?
A: Yes, of course.
Q14. How about your after-sales service?
A: Provide customers with installation and commissioning online instructions, and arrange for our engineers to help you with training and installation.
Audited Supplier 
){kind=link}
){kind=link}