China Sanzhi Wholesale 55kw Permanent Magnet VFD Screw Air Compressor with Variable Speed for Food Factory

• Customization: Available
• Brand Name: Sanzhi
• Power: 55kw
• 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 air compression, the ideal scenario envisions a power requirement for single-stage pressure transmission equating to the cumulative power needed for multi-stage compression. Yet, real-world conditions introduce factors such as coupling power loss, bearing friction, and cooling effects due to liquid viscosity, which inflate the actual working power. To mitigate this inefficiency, reducing the compression ratio at each stage emerges as a strategic solution. This approach ensures that the collective power needed for multi-stage compression remains below that of a single-stage system, optimizing performance and reducing wasted energy.

The innovative two-stage screw air compressor boasts a sophisticated construction featuring dual rotary screw compressors, each equipped with an active and passive screw. The active screw, bolstered by an external power transmission device, energizes the passive screw. At the heart of this system, the first stage deploys a low-pressure rate screw group, while the second stage commands with a high-pressure rate variant. Enveloping each screw, a sealing air film optimizes the rotation process, allowing gas compression through a seamless cycle of suction, pressurization, and exhaust, ensuring efficiency and performance.

First stage compression: In this initial phase, the two-stage screw air compressor employs a low-pressure rate screw group to expertly squeeze the gas. As the gas navigates into the screw compression chamber via the suction valve, the high-speed screw rotor's rotation gradually compresses and channels it onward to the second stage, laying the foundation for efficient compression.

Second stage compression: Progressing to the second stage, the gas encounters a more constricted screw space, where it's subjected to intensified temperature and pressure. As the compression reaches its zenith, the exhaust valve activates, smoothly expelling high-pressure gas and maintaining system efficiency.

Natural air, purified through an air filter, embarks on its journey into the first compression stage, where it mingles with a trace of lubricating oil within the compression chamber. This mixture undergoes compression to interstage pressure. The resultant compressed gas then traverses the cooling channel, engaging with abundant oil mist to dramatically lower its temperature. The cooled, compressed gas subsequently advances to the second-stage rotor, where it experiences a second round of compression, reaching the final exhaust pressure. Completing its odyssey, the gas exits the compressor via the exhaust valve, culminating in a flawlessly executed compression process.

 

Detailed Photos

 

 

 

1) Superior Efficiency of the PM Motor: With a broader constant torque and weak magnetic range, the permanent magnet motor's efficiency surpasses regular motors by an impressive 20-30%. Even when functioning away from the rated frequency, this motor maintains an exceptionally high efficiency level.

2) Maintenance-Free Motor Operation: The innovative design of the permanent magnet motor eliminates internal bearings, significantly reducing maintenance costs for motor bearing upkeep and replacement.

3) Seamless Integrated Frequency Converter: Featuring China's top-tier frequency system, it offers an expansive speed regulation range and precise control, aligning with actual gas demands for efficient frequency modulation, showcasing outstanding energy-saving capabilities of the air compressor.

4) Absolute Transmission Efficiency: The permanent magnet motor and compressor's embedded integrated shaft structure is directly connected, ensuring a compact design with 100% transmission efficiency, free from any coupling or additional transmission components.

5) Variable Frequency and Soft Start Optimization This feature is ingeniously designed to minimize impact on power grid equipment, safeguarding electrical systems from potential damage.

6) Enhanced Energy Efficiency: With a frequency conversion range spanning 25% to 100% (compared to the usual 50% to 100%), it achieves over 30% energy savings compared to fixed-speed compressors. Even against standard variable frequency models, it offers about 5% additional savings. Greater gas consumption fluctuations yield even more pronounced savings.

7) Revolutionary Two-Stage Compression Air End: Crafted with an inventive design, the two-stage compression screw machine unites the first and second-stage rotors within a single case, each driven directly by gears to attain optimal linear speed and peak compression efficiency.

8) Innovative Internal Spray Curtain Cooling: This advanced cooling method, known for its energy efficiency, delivers an exceptional cooling effect, substantially lowering compressed air temperature, achieving near-isothermal compression, reducing pressure loss, compression ratio, and enhancing efficiency.

9) Minimized Internal Leakage: Employing two-stage compression reduces the compression ratio per stage, curtails internal leakage from high to low pressure ends, thereby boosting volume efficiency.

10) Remarkable Noise Reduction: The two-stage compression method significantly diminishes the compression ratio, markedly reducing noise levels, notably during unloading.

11) Simplified Maintenance and Service: The two-stage compressor unit maintains identical system structures to single-stage compression, aside from the screw air end, simplifying maintenance routines and user operation.

 

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. Price Advantage

We offer customers direct access to ex-factory prices, ensuring our clients stand out with a competitive edge in the market.

2. Direct Deal
Our entire product line is available straight from the factory, guaranteeing you more cost-effective and value-driven solutions.

3. OEM & ODM Services
Benefit from our factory's robust production and management capabilities, which allow us to provide tailored OEM and ODM services to meet your unique needs.

4. Customized Service
We embrace non-standard and export orders with flexibility in voltage, power, and pressure specifications, ensuring they are customized to your exact requirements. Reach out to us to discuss your demands.

5. Accept Small Orders
Test the exceptional quality of our offerings by starting with a small trial order, perfect for your initial evaluation needs.

6. Fast Delivery
Experience high-quality product fulfillment with the assurance of timely delivery, every time.

7. Complete Authorization
For our valued distributors, we provide comprehensive authorization certificates, empowering you to confidently promote and sell our esteemed SANZHI brand products.
 

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Packaging & Shipping

Company Profile

 

Sanzhi (Henan) Compressor Co., Ltd is a distinguished manufacturer with over a decade of excellence in producing high-quality screw air compressors and vacuum pumps. Our expansive product line features a broad array of options, including normal pressure and low-pressure screw air compressors, cutting-edge permanent magnet frequency conversion screw air compressors, the advanced two-stage compression screw air compressors, specialized screw air compressors for laser cutting, versatile single-tank and double-tank mobile screw air compressors, highly efficient electric mobile screw air compressors, robust diesel mobile screw air compressors, and efficient screw vacuum pumps, among others.

Our state-of-the-art production facilities are equipped with sophisticated multi-air compressor assembly lines that are designed for maximum efficiency, embodying the pinnacle of lean and modern manufacturing practices. With a dedicated team of over 50 skilled employees, we tirelessly refine our management systems, such as ERP, to minimize lead times and ensure that our customers receive top-quality products swiftly and reliably.

Our unwavering commitment to quality management is demonstrated by our factory's ISO9001 certification and our rigorous adherence to stringent quality management protocols. Each machine undergoes a comprehensive quality journey, including meticulous material inspections, thorough production assessments, and exhaustive pre-delivery inspections, ensuring that only the finest products leave our facility.

In the realm of customer service, we excel at offering expert pre-sales guidance to assist customers in selecting the ideal air equipment tailored to their specific needs, complete with high levels of customization in appearance and configuration. Our ability to deliver bespoke products to meet the unique demands of dealers, including OEM solutions, sets us apart. Moreover, our dedicated sales and service team is committed to providing rapid and effective after-sales support, ensuring complete customer satisfaction.

At Sanzhi (Henan) Compressor Co., Ltd, we are passionately dedicated to delivering products of superior quality and stability, fostering enduring relationships with our valued customers. Our promise of efficient delivery, exceptional product quality, and competitive pricing makes us the trustworthy choice for all your compressed air solutions.

Nestled in the vibrant city of Xinzheng, Henan Province, China, our factory is conveniently located just 30 kilometers from Xinzheng International Airport. We warmly invite you to visit us, and we offer complimentary transfers from the airport to our facility, ensuring a seamless and welcoming experience. Welcome to Sanzhi (Henan) Compressor Co., Ltd!
 

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.