China Sanzhi Manufacturer 90kw 120HP Two-Stage Permanent Magnet VFD Screw Compressor for Industrial Applications

• Customization: Available
• After-sales Service: Online Technology Support
• Warranty: 1 Year for The Whole Machine & 2 Years for Airend
• Model NO.: SZ90VF-II
• 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

Discover the pinnacle of industrial efficiency with our Low-Pressure Compressor, featuring advanced Two-Stage Compression technology. This revolutionary Permanent Magnet Variable Frequency Drive Screw Air Compressor is meticulously engineered for optimal performance across a wide range of power capacities, including 15KW, 22KW, 30KW, 37KW, 45KW, 55KW, 75KW, 90KW, 110KW, 132KW, 160KW, 185KW, 200KW, and 250KW. Perfectly suited for diverse industrial applications, it ensures unparalleled energy savings, reliability, and operational excellence.


 

Product Structure

Internal Structure Frontside

Internal Structure Backside

Working Principle

In an ideal air compression scenario, the energy required for single-stage compression should match the cumulative energy needed for multi-stage compression. Yet, in practical applications, factors such as coupling transmission power loss, bearing friction, and the cooling effect of liquid viscosity increase the actual operational power. By minimizing the compression ratio for each stage, we can effectively reduce unnecessary power consumption, ensuring that multi-stage compression requires less energy than single-stage compression.

The two-stage screw air compressor is an advanced system comprising two rotary screw compressors. Each stage features an active and a passive screw. The active screw propels the passive screw using an external power transmission mechanism. The initial stage employs a low-pressure screw group, while the subsequent stage utilizes a high-pressure screw group. A sealing air film envelops each screw, and during operation, the gas undergoes three transformative phases: suction, pressurization, and exhaust.

First Stage Compression: The initial stage of the two-stage screw air compressor features a low-pressure screw group, which compresses the gas within. The gas is drawn into the screw compression chamber via the suction valve, and through the rapid rotation of the screw rotor, it is gradually compressed and moves onward to the second stage of compression.

Second Stage Compression: Within the second stage screw group, the gas is introduced into a more constrained screw space, experiencing compression at elevated temperatures and pressures. The exhaust valve opens to efficiently expel high-pressure gases from the system, completing the compression cycle.

Natural air is drawn into the first stage through an air filter, where it combines with a small amount of lubricating oil in the compression chamber. This mixture is compressed to the interstage pressure. Upon entry into the cooling channel, it interacts with abundant oil mist, significantly lowering its temperature. The cooled compressed gas proceeds to the second-stage rotor, where it undergoes secondary compression, reaching the final exhaust pressure. Ultimately, the compressor releases the gaseous output through the exhaust valve, culminating the comprehensive compression process.

 

Detailed Photos

1) High efficiency of PM motor: The constant torque range and weak magnetic range are wider, The efficiency of the permanent magnet motor is higher by 20-30% than that of the regular motor. When the permanent magnet motor operates away from the rated frequency, its efficiency is basically unchanged, and it can still maintain extremely high motor efficiency.

2)Two-stage compression unique air end: The two-stage compression screw machine has a unique design for the air end. It combines the first-stage compression rotor and the second-stage compression rotor in a case, and rotates them directly through gears respectively, so that each stage of the rotor can obtain the best linear speed, so that the compression efficiency is higher.

3)Integrated frequency converter: Adopt the top frequency system in China, with a wide range of speed regulation, and high precision, according to the user's actual gas demand frequency modulation operation, the air compressor energy saving effect is remarkable.
 

4)Reduce internal leakage: Two-stage compression is adopted, which reduces the compression ratio of each compression, reduces the internal leakage from the high-pressure end to the low-pressure end, and improves the volume efficiency.

5)Variable frequency start and the soft start of the motor are realized, which greatly reduce the impact on the power grid equipment and do not cause damage to the electrical equipment.

6)Reduce energy consumption: Frequency conversion range from 25% to 100% (ordinary frequency conversion from 50% to 100%), compared with fixed speed air compressor, energy saving up to more than 30%; Compared with the ordinary variable frequency air compressor, the energy saving is about 5%. And the larger the fluctuation of the system gas consumption, the more obvious the energy-saving effect.
 

7)No transmission loss: the permanent magnet motor and the compressor adopt the embedded integrated shaft directly connected structure, which is more compact in structure. There is no coupling and other transmission parts, and the transmission efficiency is 100%.

8)Air cooling method: using high energy saving air cooling method, good cooling effect, greatly reduces the temperature of compressed air, achieves close to isothermal compression, but also can reduce the pressure loss between the first and second, reduce the compression ratio, improve the compression efficiency.

9)Smart Touch Controller:Superior built-in intelligence requires minimal manual operation. A high-precision color electronic screen, clear graphics display, and indication of maintenance information, fault alarms, and safety shutdown alarms.
 

10)Special Type Intake Valve: Automatic control of the opening, to ensure the engine fuel injection and lubricating oil circulation.
Ultra-low oil circuit loss, overall efficiency improvement.
Normally open solenoid valve control, emergency stop automatically closed, prevent oil injection.

11)Excellent Air Filter: An air filter with excellent air purification capability ensures a clean air system and three-stage filtration to maximize air purification and meet standard emissions, it can remove a lot of steam and a small amount of dust gas occasions.

12)High-Quality Soundproof Cotton: Compact noise reduction housing, achieving no vibration amplitude during operation, cooperates with high-quality soundproof cotton to further improve noise reduction levels.
 

13)Motor maintenance-free: The permanent magnet motor has no bearings inside, which eliminates the cost of motor bearing maintenance and replacement.

14) Noise Reduction: Experience a significant drop in noise levels with our innovative two-stage compression system. By minimizing the compression ratio, we not only achieve efficient performance but also deliver a considerable reduction in operational noise, particularly during unloading phases. Enjoy a quieter working environment with the advanced design of our compressor.

15) Easy Maintenance and Service: Our state-of-the-art two-stage compressor units are designed with user convenience in mind. Apart from the sophisticated screw air end, all other systems and structures align seamlessly with those found in single-stage compressors. This thoughtful design ensures that maintenance and operation are straightforward and user-friendly, allowing for hassle-free service and upkeep.

 

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. Price Advantage

We proudly offer ex-factory prices directly to our valued customers, enhancing their competitiveness in the market.

2. Direct Deal
Our entire product range is sourced directly from the factory, enabling us to present you with unrivaled cost-effective solutions.

3. OEM & ODM Services
Leveraging the robust production and management capabilities of our factory, we tailor OEM and ODM services to meet your precise needs.

4. Customized Service
We embrace non-standard, export, voltage/power/pressure orders, fully customized to your specifications. Contact us to explore your tailored options.

5. Accept Small Orders
Begin with a small trial order to experience the exceptional quality of our offerings firsthand.

6. Fast Delivery
Rely on us for high-quality products paired with prompt and reliable delivery services.

7. Complete Authorization
We provide comprehensive authorization certificates for distributors, empowering you to sell our prestigious SANZHI brand products with confidence.

 

Packaging & Shipping

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Company Profile

Sanzhi (Henan) Compressor Co., Ltd is a distinguished manufacturer of screw air compressors and screw vacuum pumps, backed by over a decade of expertise. We boast an extensive collection of products, including normal pressure and low-pressure screw air compressors, permanent magnet frequency conversion screw air compressors, two-stage compression screw air compressors, and specialized screw air compressors for laser cutting. Our lineup also features single-tank and double-tank mobile screw air compressors, along with electric and diesel options, as well as high-performance screw vacuum pumps. Our comprehensive offerings ensure we can meet diverse industrial needs with exceptional efficiency.

In our state-of-the-art production facilities, we harness the power of multi-air compressor assembly lines that are both lean and modern, achieving unparalleled production efficiency. Supported by a dedicated team of over 50 employees, we continually refine our management systems, such as ERP, to minimize lead times and ensure rapid delivery of top-quality products.

Our management excellence is underscored by our ISO9001 quality management system certification. We are committed to maintaining rigorous quality standards, adhering to detailed quality control processes. Each machine undergoes thorough material inspection, production testing, and pre-delivery evaluation, ensuring our customers receive only the best.

In customer service, we deliver exceptional pre-sales support, offering expert guidance for selecting air equipment tailored to various facilities. Our high-customization capabilities allow us to modify appearance and configuration, even crafting unique OEM products to meet specific dealer requirements. Our dedicated sales and service team is poised for swift after-sales responses, ensuring customer satisfaction at every step.

At Sanzhi (Henan) Compressor Co., Ltd, we are committed to providing superior, stable products for lasting relationships with our valued customers. With efficient delivery, certified machines, and fair pricing, we are your trusted partner for satisfying compressed air solutions.

Our factory is situated in Xinzheng City, Henan Province, China. We gladly offer transportation from Xinzheng International Airport to our factory, just 30 kilometers away, taking about an hour. We warmly invite you to visit us and explore our offerings firsthand!

Certifications

 

Successful Cases


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

Q2. How do you control quality?
A: 1. We rigorously inspect all raw materials to ensure premium quality.
2. Our installation processes are meticulously controlled to guarantee precision.
3. Each machine undergoes a minimum of 5 hours of continuous testing before departing our facility, ensuring impeccable performance.

Q3. What information must I provide to get the suitable machine?
1. Specify the required air delivery capacity (Units: CFM or m³/Min).
2. Provide the desired working pressure (Units: PSI, Bar, or Mpa).
3. Indicate the voltage and frequency applicable in your country (V/Hz).
4. Inform us if additional accessories, such as an air tank, filters, or air dryers, are needed.
Share these details with us, and we will tailor an ideal scheme for you!

Q4. What is the general unit conversion?
1Bar = 0.1Mpa = 14.5PSI - an essential conversion for precise measurements.
1m³/min = 35.32cfm - a key conversion for understanding airflow.
1KW = 1.34HP - know your power conversion for optimal efficiency.

Q5. What is the available voltage air compressor?
A: Sanzhi compressors are versatile, supporting voltages like 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, 440v/60hz/3p, with customization options to cater to your precise needs.

Q6. How long is the delivery time?
A: For standard voltage models, delivery is within 15 working days post order confirmation. For non-standard requirements, kindly consult our sales team for guidance.

Q7. What's the payment term?
A: Payment terms include 30% T/T in advance, 40% T/T pre-shipment, and 30% T/T upon receipt of the B/L copy, with options for transactions in USD or RMB.

Q8. How about your warranty?
A: We offer a comprehensive warranty: one year coverage 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 should occur after 500 hours, followed by routine maintenance every 2000-3000 hours, adjusted based on actual operational conditions.

Q10. Can machines be run in high-temperature environments?
A: Absolutely, our machines are engineered to operate efficiently in high-temperature regions, managing working temperatures from -20° to 45°(-4ºF-113ºF).

Q11. Do you offer OEM service?
A: Yes, indeed! With our expert design team, we warmly welcome both OEM & ODM orders to fulfill your specific requirements.

Q12. How long could your air compressor be used?
A: Typically, our air compressors are designed for a lifespan exceeding 10 years, ensuring long-term reliability.

Q13. Will you provide some spare parts for the machines?
A: Certainly, we provide all necessary spare parts to ensure seamless operation and maintenance.

Q14. How about your after-sales service?
A: Our commitment extends beyond sales with comprehensive after-sales support, including online installation and commissioning guidance, alongside dispatching engineers for training and installation assistance.