China Sanzhi High-Power Sanzhi 55kw Permanent Magnet VFD Two-Stage Screw Air Compressor (0.8MPa-1.6MPa) for Food Factory Use

• Customization: Available
• Brand Name: Sanzhi
• Power: 75kw
• Model NO.: SZ55VF-II
• Exhaust Pressure: 0.5-1.6 MPa
• Weight: 2280kg
• Condition: New
• Transport Package: Standard Wooden Package
• Specification: 2150*1300*1730mm
• Trademark: SZ
• Origin: Zhengzhou
• HS Code: 8414804990
• Production Capacity: 500PCS/Month
• Package Size: 220.00cm * 135.00cm * 183.00cm
• Package Gross Weight: 2280.000kg

Product Description

Product Structure

 

Internal Structure Frontside

Internal Structure Backside


Working Principle

In the realm of ideal air compression, the power needed for single-stage pressure transmission perfectly matches the cumulative power required for multi-stage compression. However, in the real-world scenario, various factors such as coupling transmission power loss, bearing friction, and the cooling effect influenced by liquid viscosity contribute to an increase in actual working power. To enhance efficiency and minimize unnecessary power consumption, it's essential to lower the compression ratio at each stage. This strategic reduction ensures that the overall power demand for multi-stage compression is significantly less than that for single-stage compression.

The innovative two-stage screw air compressor is ingeniously designed with a dual rotary screw mechanism. Each stage features both an active and a passive screw, where the active screw drives its counterpart via an external power transmission system. The compressor's initial stage employs a low-pressure rate screw assembly, while the subsequent stage operates with a high-pressure rate screw assembly. Encircling each screw is a protective sealing air film, and as they rotate, the gas undergoes a seamless transformation through three pivotal phases: suction, pressurization, and exhaust. This design maximizes efficiency and optimizes air compression.

First stage compression: The two-stage screw air compressor initiates its process with a low-pressure rate screw assembly, effectively squeezing the gas between its components. Upon entering the screw compression chamber through the suction valve, the gas is subjected to the high-speed rotation of the screw rotor. This motion gradually expels and transfers the compressed gas towards the second stage, setting the foundation for advanced compression.

Second stage compression: Upon reaching the second stage screw assembly, the gas is channeled into a more confined screw space where it undergoes further compression at elevated temperatures and pressures. The exhaust valve then opens, efficiently expelling the high-pressure gases from the system, completing the advanced compression cycle.

Natural air, meticulously filtered, enters the compression system's first stage through the air filter. Within the compression chamber, it mingles with a precise amount of lubricating oil, creating a mixture that undergoes initial compression to reach interstage pressure. This compressed mixture traverses the cooling channel, encountering substantial oil mist, which significantly diminishes its temperature. This cooling phase prepares the gas for its journey into the second-stage rotor. Here, it undergoes further compression, achieving the ultimate exhaust pressure. The entire process culminates as the fully compressed gas is expelled via the exhaust valve, completing the comprehensive compression sequence.

 

Detailed Photos

 

 

 

1) Supreme Efficiency of PM Motor: Discover the brilliance of our permanent magnet motor, which boasts an expansive constant torque range and an impressive weak magnetic range. Its efficiency outshines that of standard motors by an extraordinary 20-30%. Even when operating beyond rated frequencies, this motor retains its efficiency, delivering unmatched performance with consistently high motor efficiency.

2) Hassle-Free Motor Maintenance: Experience the convenience of a maintenance-free design. Our permanent magnet motor is crafted without internal bearings, which entirely eliminates the need for bearing maintenance and replacement, cutting down on long-term costs.

3) Advanced Integrated Frequency Converter: Embrace cutting-edge technology with the leading frequency system in China. Offering a broad spectrum of speed regulation and precision, it dynamically adjusts to match your specific gas needs. The result is monumental energy savings in air compressor operation.

4) Absolute Transmission Efficiency: Our innovative design integrates the permanent magnet motor directly with the compressor via an embedded shaft structure. This eliminates the need for couplings and other transmission components, ensuring that transmission efficiency is a perfect 100%.

5) Optimized Variable Frequency Start and Gentle Motor Soft Start This feature significantly minimizes the impact on power grid equipment, safeguarding against potential electrical damage.

6) Enhanced Energy Savings: With a frequency conversion range of 25% to 100%-surpassing ordinary systems that range from 50% to 100%-our system achieves over 30% energy savings compared to fixed speed counterparts. Even compared to typical variable frequency compressors, it saves about 5% in energy. The more variable the system's gas consumption, the more pronounced the energy-saving benefits.

7) Innovative Two-Stage Compression Air End: Our two-stage compression screw machine revolutionizes efficiency with its ingeniously designed air end. It unites the first and second-stage compression rotors within one casing, rotating them directly via gears. This ensures optimal linear speed for each rotor, elevating compression efficiency to new heights.

8) High-Efficiency Internal Spray Curtain Cooling: Utilizing an exceptionally energy-saving spray curtain cooling method, this system delivers outstanding cooling performance. It significantly reduces compressed air temperatures, nearly achieving isothermal compression. Additionally, it minimizes pressure loss between stages, reduces compression ratios, and enhances compression efficiency.

9) Enhanced Internal Leak Prevention: By employing a two-stage compression strategy, the compression ratio per stage is reduced. This design diminishes internal leakage from high to low-pressure ends, thus boosting volumetric efficiency.

10) Superior Noise Reduction: Our two-stage compression approach not only reduces the compression ratio but also drastically cuts down noise, particularly during unloading.

11) Simplified Maintenance and Service: The dual-stage compressor unit maintains a design consistent with single-stage compression systems, aside from the screw air end. This consistency simplifies maintenance and enhances user convenience.

 

Product Parameters

 

Sanzhi (Henan) Compressor Co,. Ltd.
Two-Stage Compression Permanent Magnet Variable Frequency Screw Air Compressor
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. Unbeatable Price Advantage

We offer direct ex-factory prices to our esteemed customers, ensuring you gain a powerful edge in the competitive market.

2. Direct Factory Deal
Our entire product range is supplied straight from our factory, guaranteeing you receive the most cost-effective solutions.

3. Exceptional OEM & ODM Services
Backed by our robust production and management capabilities, we are fully equipped to offer tailored OEM/ODM solutions to meet your needs.

4. Personalized Custom Service
We embrace non-standard and export orders with flexible customization in voltage, power, pressure, and more. Reach out to us with your specific requirements.

5. Flexible Small Order Acceptance
Initiate a small trial order to experience the superior quality of our products firsthand.

6. Swift and Reliable Delivery
Expect high-quality products delivered promptly, ensuring your operations proceed without delay.

7. Comprehensive Authorization
For our distributors, we provide complete authorization certificates, empowering you to market our renowned SANZHI brand products.
 

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Packaging & Shipping

Company Profile

 

Sanzhi (Henan) Compressor Co., Ltd. stands as a beacon of excellence in the realm of manufacturing, specializing in the production of cutting-edge screw air compressors and screw vacuum pumps. With over a decade of rich industry experience, we boast an extensive and diverse product lineup that caters to varying needs. Our offerings include normal pressure and low-pressure screw air compressors, innovative permanent magnet frequency conversion screw air compressors, and advanced two-stage compression screw air compressors. We also provide specialized models such as screw air compressors tailored for laser cutting, single-tank and double-tank mobile screw air compressors, as well as electric and diesel mobile screw air compressors, not to forget our efficient screw vacuum pumps.

Our production prowess is unmatched, achieved through the strategic use of state-of-the-art multi-air compressor assembly lines. These lines are designed to be both lean and modern, ensuring high efficiency in production. Powered by a dedicated team of over 50 skilled employees, we consistently refine our management systems, including ERP, to significantly reduce lead times and rapidly deliver top-tier products to our clients.

Our commitment to excellence in management is evidenced by our factory's ISO9001 quality management system certification. We unwaveringly adhere to rigorous quality management practices and strictly enforce standard quality control processes. Every machine we produce undergoes a meticulous and comprehensive inspection process, including material inspection, production inspection, and a thorough pre-delivery inspection, ensuring that only the highest quality products leave our facility.

At Sanzhi, our customer service is unparalleled. In the pre-sales phase, we provide expert guidance to help our customers select the perfect air equipment for their diverse facilities. We pride ourselves on offering extensive customization options, from appearance to allocation, and can create bespoke products to suit the specific demands of dealers through our OEM services. Our after-sales support is robust, with a highly professional sales and service team on standby to offer swift and effective responses to any customer inquiries or needs.

At Sanzhi (Henan) Compressor Co., Ltd., our mission is to consistently deliver products that are not only superior in quality but stable in performance. We are dedicated to nurturing long-standing relationships with our customers, built on the pillars of efficient delivery, quality assurance, and competitive pricing. Trust us to provide you with a reliable and comprehensive compressed air solution that meets your needs.

Our state-of-the-art factory is strategically situated in the vibrant city of Xinzheng, Henan Province, China. For your convenience, we offer transportation from Xinzheng International Airport to our factory, a journey of merely 30 kilometers that takes approximately one hour. We warmly welcome you to visit our company and experience our commitment to excellence 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.