Durable Two-Stage Screw Air Compressor Twin-Screw Screw Energy Efficiency Air Compressor Variable Frequency

• Customization: Available
• After-sales Service: Online Technology Support
• Warranty: 1 Year, 2 Years
• Model NO.: SZ90VF-II
• Lubrication Style: Lubricated
• Cooling System: Air Cooling
• Power Source: AC Power
• Cylinder Position: Vertical
• Structure Type: Closed Type
• Installation Type: Stationary Type
• Type: Twin-Screw Compressor
• Brand Name: Sanzhi
• Power: 90kw
• Exhaust Pressure: 0.5-1.6 MPa
• Weight: 3200kg
• Free Air Delivery* of Unit at Working: 24-11m³/Min
• Condition: New
• Voltage: 220V / 380V / 400V / 415V
• Frame Color: White, Beige and Gray Combination, or Any Color
• Transport Package: Standard Wooden Package
• Specification: 2700*1920*1820mm
• Trademark: SZ
• Origin: Zhengzhou
• HS Code: 8414804990
• Production Capacity: 500PCS/Month
• Package Size: 275.00cm * 197.00cm * 187.00cm
• Package Gross Weight: 3200.000kg

Product Description

Introducing the groundbreaking Low-Pressure Compressor by Sanzhi (Henan) Compressor Co., Ltd.! This state-of-the-art Two-Stage Compression Permanent Magnet Variable Frequency Drive Screw Air Compressor is meticulously engineered to elevate industrial excellence to new heights. Available in an extensive range of power options-including 15KW, 22KW, 30KW, 37KW, 45KW, 55KW, 75KW, 90KW, 110KW, 132KW, 160KW, 185KW, 200KW, and 250KW-this versatile and robust machine ensures unmatched efficiency, durability, and reliability. Transform your operations with this cutting-edge solution, explicitly designed to meet the diverse and demanding needs of today's modern industries. Experience unparalleled performance and elevate your productivity with Sanzhi's innovative compressor technology!

Product Structure

 

Internal Structure Frontside

Internal Structure Backside

Working Principle

In an ideal air compression scenario, the energy required for single-stage pressure transmission equates to the combined energy demands of multi-stage compression. Realistically, however, factors such as coupling power losses, bearing friction, and the cooling effects of fluid viscosity result in higher operational power requirements. Reducing the compression ratio at each stage minimizes these inefficiencies. Consequently, the total power consumption for multi-stage compression is lower than that of single-stage compression.

Our cutting-edge two-stage screw air compressor features a sophisticated twin-stage rotary screw mechanism. This advanced system includes an active screw in each stage driving a passive screw via a robust external power transmission setup. The first stage uses a low-pressure screw group, while the second stage employs a high-pressure screw group. Every screw is encased within a sealing air film. As they rotate, the gas undergoes a tri-phase process: suction, pressurization, and exhaust, ensuring optimal compression efficiency.

First Stage Compression: Equipped with a low-pressure screw group, the initial stage of the two-stage screw air compressor compresses the gas efficiently. Gas is drawn into the compression chamber through the suction valve, where the high-speed rotation of the screw rotor compresses it before transferring it to the second stage.

Second Stage Compression: Within the second stage screw group, the gas is further compressed in a more confined screw space, reaching higher temperatures and pressures. The exhaust valve then opens, releasing the high-pressure gases from the system and completing the compression process.

Natural air is initially drawn through the air filter into the first compression stage, where it merges with a small quantity of lubricating oil. This mixture is compressed to an intermediate pressure. Following this, the gas enters a cooling channel, interacting with a substantial amount of oil mist that significantly lowers its temperature. The cooled, compressed gas then advances to the second-stage rotor for final compression to the ultimate exhaust pressure. The process culminates as the fully compressed gas exits the system through the exhaust valve, completing the compression cycle.

Detailed Photos

 

 

1) High efficiency of PM motor:Experience unparalleled efficiency with our advanced permanent magnet motor. Its constant torque range and weak magnetic range are significantly wider, delivering an efficiency boost of 20-30% over conventional motors. Even when operating away from the rated frequency, the motor sustains its high efficiency, ensuring optimal performance at all times.

2)Two-stage compression unique air end:Our revolutionary two-stage compression screw machine features a uniquely designed air end. The first and second-stage compression rotors are combined within a single casing and driven directly by gears, enabling each rotor to achieve the optimal linear speed and thereby maximizing compression efficiency.

3)Integrated frequency converter: Equipped with China's premier frequency system, the air compressor offers a wide range of speed regulation and high precision. Users can modulate the frequency according to actual gas demand, leading to remarkable energy savings and operational efficiency.

 

4)Reduce internal leakage:Employing two-stage compression technology reduces the compression ratio for each stage, thereby minimizing internal leakage from the high-pressure end to the low-pressure end while significantly enhancing volumetric efficiency.

5)Variable frequency start and the soft startof the motor are achieved, significantly reducing the impact on power grid equipment and preventing damage to electrical components.

6)Reduce energy consumption: Our frequency conversion operates from 25% to 100%, a significant improvement over the ordinary 50% to 100% range. Compared to fixed-speed air compressors, energy savings can exceed 30%. Even against regular variable frequency compressors, it offers around 5% more energy efficiency, with greater savings for systems with fluctuating gas demands.

 

7)No transmission loss: The permanent magnet motor and compressor utilize an embedded integrated shaft direct connection structure, making it more compact. With no couplings or other transmission parts, the transmission efficiency reaches an unparalleled 100%.

8)Air cooling method: Our high energy-efficient air cooling method delivers excellent cooling performance, significantly reducing the temperature of compressed air. This near-isothermal compression also minimizes pressure loss between stages, reducing the compression ratio and enhancing overall efficiency.

9)Smart Touch Controller:Our state-of-the-art built-in intelligence requires minimal manual operation. Featuring a high-precision color electronic screen, it provides clear graphical displays, maintenance information, fault alarms, and safety shutdown alerts for seamless operation.

 

10)Special Type Intake Valve:Automatically controlled opening ensures smooth engine fuel injection and lubricating oil circulation.
Ultra-low oil circuit loss enhances overall efficiency.
The normally open solenoid valve automatically closes during emergency stops to prevent oil injection, ensuring system safety.

11)Excellent Air Filter:Our top-tier air filter boasts exceptional air purification capabilities, ensuring a clean air system with three-stage filtration for superior air quality. It efficiently removes steam and dust, meeting stringent emission standards.

12)High-Quality Soundproof Cotton:Our compact noise reduction housing, coupled with high-quality soundproof cotton, minimizes operational vibration and significantly enhances noise reduction, ensuring a quieter, more efficient workspace.

 

13)Motor maintenance-free:Our permanent magnet motor, free of internal bearings, eliminates the need for motor bearing maintenance and replacement, reducing long-term maintenance costs and enhancing reliability.

14)Noise reduction:Experience unparalleled tranquility with our state-of-the-art two-stage compression technology. This advanced system significantly lowers the compression ratio, dramatically reducing operational noise, especially during unloading. Revel in a quieter, more efficient working environment.

15) Effortless Maintenance and Service:Our innovative two-stage compressor unit preserves the familiar structure and systems of a single-stage compressor. By excluding only the screw air end, we ensure that maintenance and service remain straightforward and user-friendly for everyone, allowing for hassle-free upkeep and consistent performance. Delight in the ease of maintaining high operational standards without the usual complications.

Product Parameters

 

Model	Power	Exhaust pressure	Free air delivery* of unit at working pressure	Voltage	Frequency	Air outlet discharge size	Weight	Dimensions
	KW	Mpa	m³/min	V	Hz	Inch	Kg	L*W*H(mm)
SZ15VF-II	15	0.5	4.00	380	50	G1½	660	1450*780*1180
		0.8	3.00
		1.3	2.00
SZ19VF-II	18.5	0.5	5.00	380	50	G1½	680	1450*780*1180
		0.8	4.00
		1.3	3.80
		1.6	2.20
SZ22VF-II	22	0.5	6.60	380	50	G1½	730	1650*880*1280
		0.8	4.20
		1.3	3.00
		1.6	2.50
SZ30VF-II	30	0.5	7.00	380	50	G1½	980	2000*1260*1560
		0.8	6.40
		1.3	4.00
		1.6	3.00
SZ37VF-II	37	0.5	10.00	380	50	G1½	1080	2000*1260*1560
		0.8	7.00
		1.3	5.50
		1.6	4.00
SZ45VF-II	45	0.5	13.00	380	50	G2	1980	2000*1260*1560
		0.8	10.00
		1.3	6.50
		1.6	5.00
SZ55VF-II	55	0.5	17.00	380	50	G2	2180	2150*1300*1730
		0.8	12.00
		1.3	8.60
		1.6	5.00
SZ75VF-II	75	0.5	20.00	380	50	G2	2280	2150*1300*1730
		0.8	16.50
		1.3	11.00
		1.6	9.00
SZ90VF-II	90	0.5	24.00	380	50	DN65	3200	2700*1920*1820
		0.8	20.00
		1.3	14.00
		1.6	11.00
SZ110VF-II	110	0.5	28.00	380	50	DN65	3360	2700*1920*1820
		0.8	24.50
		1.3	18.00
		1.6	14.00
Due to product updates, the above parameters are subject to deviation in kind.

 

Our Advantages

 

1. Competitive Pricing

Unlock unparalleled savings by sourcing directly from Sanzhi (Henan) Compressor Co., Ltd. Our factory-direct pricing ensures you remain a frontrunner in the competitive market.

2. Direct Transactions
Maximize cost-efficiency with our direct sourcing model. Every product delivered straight from our factory to your hands guarantees superior value.

3. OEM & ODM Services
Harness our extensive production and management expertise to obtain custom OEM and ODM services, meticulously crafted to meet your specific needs.

4. Customized Solutions
We specialize in non-standard and export orders, offering tailor-made solutions for unique voltage, power, and pressure requirements. Share your customization needs with us.

5. Small Order Acceptance
Start with a small trial order and experience firsthand the superior quality of our products. Test us to believe in our excellence.

6. Rapid Delivery
Enjoy swift, timely deliveries of premium products, ensuring smooth and uninterrupted operations for your business.

7. Comprehensive Authorization
Boost your distribution efforts with our full authorization certificates, enabling you to confidently market and sell SANZHI brand products with ease.
 

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Certifications

Sanzhi (Henan) Compressor Co., Ltd. is a distinguished manufacturer specializing in the creation of top-notch screw air compressors and vacuum pumps. With over a decade of industry prowess, we present a diverse array of products including normal and low-pressure screw air compressors, permanent magnet frequency conversion screw air compressors, advanced two-stage compression screw air compressors, precision models designed for laser cutting, versatile single-tank and double-tank mobile screw air compressors, both electric and diesel-driven mobile variants, and high-efficiency screw vacuum pumps.

Our cutting-edge production facility is equipped with multiple air compressor assembly lines, ensuring exceptional efficiency and quality. Supported by a dedicated team of over 50 professionals, we continually enhance our management systems, such as ERP, to reduce lead times and guarantee expedited delivery of premier products.

Our robust management systems are crafted to maintain the highest quality standards. Certified with the ISO9001 quality management system, we adhere to stringent quality control protocols. Each machine undergoes meticulous inspections at every stage, from material selection and production checks to pre-delivery evaluations, ensuring our products' unparalleled reliability.

Regarding customer service, our expert pre-sales team offers detailed guidance on selecting the perfect air equipment for various facilities and provides extensive customization options, including design and configuration. We also produce tailor-made products to meet specific dealer requirements through our OEM services. Our professional sales and service team is dedicated to providing prompt post-sales support, ensuring quick resolutions to any customer inquiries.

At Sanzhi (Henan) Compressor Co., Ltd., we are driven by a commitment to deliver exceptional, reliable, and stable products, striving to build long-lasting relationships with our clients. Our pledge encompasses swift delivery, superior machinery, and competitive pricing, ensuring you receive the ultimate compressed air solution.

Located in the heart of Xinzheng City, Henan Province, China, our factory is conveniently situated just 30 kilometers from Xinzheng International Airport, approximately an hour's drive. We cordially invite you to visit our facility and experience our exceptional offerings firsthand!


FAQ
Q1. Are you a trading company or manufacturer?
A: We are a distinguished manufacturer specializing in screw air compressors, proudly boasting over a decade of industry expertise.

Q2. How do you control quality?
A: 1. Our raw materials undergo rigorous inspection to ensure the highest quality.
2. The meticulous installation process is stringently monitored.
3. Every machine is subjected to a minimum of 5 continuous hours of testing before dispatch to ensure optimal performance.

Q3. What information must I provide to get the suitable machine?
1. Your required air delivery capacity (Unit: CFM or m³/Min).
2. The desired working pressure (Unit: PSI, Bar or Mpa).
3. The voltage and frequency specifications of your country of residence (V/Hz).
4. Any additional accessories needed, such as an air tank, filters, or air dryers.
Share this information with us, and we will tailor a perfect solution 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 offers a range of voltages including 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, 440v/60hz/3p, with customization options to meet your specific requirements.

Q6. How long is the delivery time?
A: For standard voltage units, delivery is within 15 working days post order confirmation. For non-standard requirements, please contact our sales team.

Q7. What's the payment term?
A: Payment terms include 30% T/T in advance, 40% T/T before shipment, and the remaining 30% T/T upon B/L copy. Payments can be made in USD or RMB.

Q8. How about your warranty?
A: We offer a comprehensive warranty of one year for the entire machine and two years for the screw air compressor, excluding consumable spare parts.

Q9. What about the maintenance?
A: The initial maintenance is required after 500 hours of operation. Subsequent maintenance should be performed every 2000-3000 hours, taking into account the actual working environment.

Q10. Can machines be run in high-temperature environment?
A: Absolutely, our machines are designed to operate efficiently in high-temperature environments, with a working temperature range from -20° to 45° (-4ºF to 113ºF).

Q11. Do you offer OEM service?
A: Yes, we excel in both OEM & ODM services, backed by our professional design team. Your custom orders are highly welcomed.

Q12. How long could your air compressor be used?
A: Our air compressors are engineered for longevity, typically exceeding 10 years of service life.

Q13. Will you provide some spare parts for the machines?
A: Certainly, we offer an extensive selection of premium spare parts to guarantee the seamless and efficient operation of your advanced machinery. Our commitment is to ensure your equipment runs flawlessly, reducing downtime and maximizing productivity.

Q14. How about your after-sales service?
A: We provide exceptional after-sales support, encompassing comprehensive online installation and commissioning guidance. Additionally, we can dispatch skilled engineers for hands-on training and installation assistance, ensuring your equipment operates at peak efficiency.