China Hot selling Screw Industrial AC Oil Free Used CHINAMFG Zr 75 Air Compressor with Hot selling

Product Description

        CHINAMFG is renowned for designing and manufacturing the most durable oil-free tooth compressors. The ZR/ZT rotary tooth compressor comes out of this strong tradition. Ideal for industries where high-quality oil-free air is key, the ZR/ZT offers the highest reliability and safety in combination with low energy costs.
       Oil-free air is used in all kinds of industries where air quality is paramount for the end product and production process. These applications include food and beverage processing, pharmaceutical manufacturing, chemical and petrochemical processing, fermentation, wastewater treatment, pneumatic conveying, non-woven textile manufacturing and many more.
       With the ZR/ZT, we provide an all-in-1 standard package incorporating the latest technology in a built-tolast design. To further optimize your ZR/ZT’s performance or to simply tailor it to your specific production environment, optional features are available.

ZR/ZT110-275(FF)
Model Hz FAD Power Noise Weight
I/s M³/min cfm kw hp db(A) Standard FF
kg  Ibs kg Ibs
ZR110-7.5 50 318.2 19.1 674 110 150 69 2709 5972 2954 6512
ZR110-8.6 50 286.1 17.2 606 110 150 69 2709 5972 2954 6512
ZR110-10 50 266.5 16 565 110 150 69 2709 5972 2954 6512
ZR132-7.5 50 365.6 21.9 775 132 150 69 2900 6393 3145 6933
ZR132-8.6 50 326.4 19.6 692 132 150 69 2900 6393 3145 6933
ZR132-10 50 314.2 18.9 666 132 150 69 2900 6393 3145 6933
ZR145-7.5 50 391.6 23.5 830 145 200 70 2895 6382 3145 6933
ZR145-8.6 50 361.7 21.7 766 145 200 70 2895 6382 3145 6933
ZR145-10 50 334.5 20.1 709 145 200 69 2895 6382 3145 6933
ZR145-13 50 304 18.2 644 145 200 73 2895 6382 3145 6933
ZR160-7.5 50 472.2 28.3 1001 160 200 69 3760 8289 4670 15715
ZR160-8.6 50 435 26.1 922 160 200 69 3760 8289 4670 15715
ZR160-10 50 402.6 24.2 853 160 200 69 3760 8289 4670 15715
ZR200-7.5 50 602.1 36.1 1276 200 250 67 3860 8510 5230 11530
ZR200-8.6 50 551.6 33.1 1169 200 250 67 3860 8510 5230 11530
ZR200-10 50 506.2 30.4 1073 200 250 69 3860 8510 5230 11530
ZR250-7.5 50 717.6 43.1 1521 250 300 67 4310 9502 5680 12522
ZR250-8.6 50 683.8 41 1449 250 300 67 4310 9502 5680 12522
ZR250-10 50 622.5 37.4 1319 250 300 67 4310 9502 5680 12522
ZR250-13³ 50 514.9 30.9 1091 250 300 70 4310 9502    
ZR275-7.5 50 774.1 46.4 1640 275 350 67 4640 15719 6571 13250
ZR275-8.6 50 716.7 43 1518 275 350 67 4640 15719 6571 13250
ZR275-10 50 683.5 41 1448 275 350 67 4640 15719 6571 13250
ZR275-13³ 50 561.8 33.7 1190 275 350 70 4640 15719    
ZT110-7.5 50 306.9 18.4 650 110 150 71 3654 8056 4146 9140
ZT110-8.6 50 286.2 17.2 606 110 150 71 3654 8056 4146 9140
ZT110-10 50 266.9 16 566 110 150 71 3654 8056 4146 9140
ZT132-7.5 50 363.1 21.8 769 132 150 72 3845 8477 4355 9601
ZT132-8.6 50 325.2 19.5 689 132 150 72 3845 8477 4355 9601
ZT132-10 50 313.3 18.8 664 132 150 72 3845 8477 4355 9601
ZT145-7.5 50 387.3 23.2 821 145 200 72 3840 8466 4350 9590
ZT145-8.6 50 358.4 21.5 759 145 200 72 3840 8466 4350 9590
ZT145-10 50 332.3 19.9 704 145 200 72 3840 8466 4350 9590
ZT160-7.5 50 465.5 27.9 986 160 200 77 5150 11354 5590 12324
ZT160-8.6 50 428.3 25.7 908 160 200 77 5150 11354 5590 12324
ZT160-10 50 396.3 23.8 840 160 200 78 5150 11354 5590 12324
ZT200-7.5 50 568.4 34.1 1204 200 250 78 5250 11574 6150 13558
ZT200-8.6 50 521.7 31.3 1105 200 250 78 5250 11574 6150 13558
ZT200-10 50 499.6 30 1059 200 250 78 5250 11574 6150 13558
ZT250-7.5 50 706.3 42.4 1497 250 300 77 5700 12566 6600 14450
ZT250-8.6 50 673.5 40.4 1427 250 300 78 5700 12566 6600 14550
ZT250-10 50 613.9 36.8 1301 250 300 78 5700 12566 6600 14550
ZT275-7.5 50 738.1 44.3 1564 275 350 77 6030 13294 7080 15609
ZT275-8.6 50 706.3 42.4 1497 275 350 78 6030 13294 7080 15609
ZT275-10 50 673.1 40.4 1426 275 350 78 6030 13294 7080 15609

After-sales Service: Online Support
Warranty: 12 Months
Lubrication Style: Oil-free
Cooling System: Water Cooling
Power Source: AC Power
Cylinder Position: Horizontal
Customization:
Available

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air compressor

Are There Oil-Free Screw Compressors Available?

Yes, oil-free screw compressors are available in the market to cater to applications where oil contamination is a concern. Here’s a detailed explanation:

Oil-free screw compressors, as the name suggests, are designed to operate without the use of lubricating oil in the compression chamber. These compressors offer several advantages in industries where oil-free compressed air or gas is required, such as in food and beverage, pharmaceutical, electronics, and certain manufacturing processes.

The key features and considerations of oil-free screw compressors include:

  • 1. Specialized Design: Oil-free screw compressors are designed with specialized materials, coatings, and sealing systems to eliminate the need for lubricating oil in the compression process. The rotors and other internal components are constructed to ensure minimal friction and wear, even in the absence of oil.
  • 2. Dry Compression: Unlike lubricated screw compressors, oil-free screw compressors rely on dry compression methods. The compression chamber is designed to achieve compression without the presence of oil, ensuring that the discharged air or gas is free from oil contaminants. This is particularly critical in industries where oil contamination can have detrimental effects on product quality or equipment performance.
  • 3. Sealing Technology: Oil-free screw compressors employ advanced sealing technologies to prevent air or gas leakage between the high-pressure and low-pressure sides of the compressor. These sealing systems ensure efficient compression while maintaining the required clearances between the rotors and the compressor housing.
  • 4. Cooling Systems: Oil-free screw compressors utilize alternative cooling methods, such as air or water cooling, to dissipate the heat generated during compression. Efficient cooling is crucial to prevent overheating and ensure reliable operation.
  • 5. Filtration Systems: Oil-free compressors often incorporate high-quality filtration systems to remove particulates, moisture, and other contaminants from the incoming air or gas. These filtration systems help maintain the integrity of the compressor and ensure the delivery of clean, oil-free compressed air or gas.
  • 6. Application-Specific Solutions: Oil-free screw compressors are available in various sizes and configurations to meet specific application requirements. They can be tailored to deliver the desired air or gas flow rates, pressures, and purity levels.

It’s important to note that oil-free screw compressors generally have higher initial costs compared to lubricated compressors due to their specialized design and materials. However, they offer benefits such as reduced maintenance, minimized risk of oil contamination, and compliance with stringent industry standards or regulations.

When considering an oil-free screw compressor, it’s crucial to assess the specific application needs, air quality requirements, and operating conditions. Consulting with manufacturers or suppliers can help in selecting the most suitable oil-free screw compressor for a particular industry or process.

In summary, oil-free screw compressors are available and offer a reliable and efficient solution for applications where oil-free compressed air or gas is essential. These compressors are designed with specialized features to ensure dry compression, reliable sealing, effective cooling, and high-quality filtration.

air compressor

What Is the Role of Control Systems in Screw Compressor Operation?

Control systems play a crucial role in the operation of screw compressors. Here’s a detailed explanation:

Screw compressors are complex machines that require precise control and monitoring for optimal performance and efficiency. Control systems provide the necessary intelligence and automation to regulate various aspects of screw compressor operation. Here are the key roles of control systems:

1. Start-up and Shutdown Control:

Control systems manage the start-up and shutdown sequences of screw compressors. During start-up, the control system ensures a gradual ramp-up of motor speed and system pressure to prevent sudden surges and excessive wear on components. During shutdown, it safely brings the compressor to a stop and performs necessary cooling and ventilation processes.

2. Load and Unload Control:

Screw compressors often feature load and unload operation to match compressed air supply with demand. The control system monitors system pressure, flow requirements, and other parameters to determine when to load or unload the compressor. It engages or disengages the compressor’s capacity control mechanism, such as inlet modulation valves or variable-speed drives, to maintain optimal operation at varying loads.

3. Pressure Control:

Control systems regulate the discharge pressure of screw compressors. They continuously monitor the system pressure and adjust compressor operation to maintain the desired pressure setpoint. The control system modulates the compressor’s capacity, adjusts the speed of the drive motor, or controls the opening and closing of inlet or discharge valves to achieve the target pressure.

4. Temperature Control:

Control systems monitor and control various temperature parameters within the screw compressor system. They ensure that the compressor operates within safe temperature limits by monitoring coolant temperatures, lubricant temperatures, and interstage or discharge temperatures. If temperature limits are exceeded, the control system may activate cooling mechanisms, adjust operating parameters, or trigger alarms and shutdowns to prevent damage.

5. Monitoring and Protection:

Control systems provide comprehensive monitoring and protection functions for screw compressors. They continuously collect data from various sensors and instruments, such as pressure sensors, temperature sensors, vibration sensors, and current sensors. The control system analyzes this data to detect abnormalities, malfunctions, or potential failures. It can initiate alarms, shutdowns, or safety interlocks to protect the compressor and associated equipment.

6. Energy Management:

Control systems optimize energy efficiency in screw compressor operation. They analyze system demand, performance characteristics, and energy consumption to make intelligent decisions regarding load modulation, capacity control, and motor speed adjustments. By optimizing the compressor’s operation, the control system helps reduce energy consumption, operating costs, and environmental impact.

7. Remote Monitoring and Control:

Modern control systems often offer remote monitoring and control capabilities. They can be integrated into supervisory control and data acquisition (SCADA) systems or connected to networked platforms. Remote access allows operators to monitor compressor performance, adjust operating parameters, receive alarms, and perform diagnostics from a central control room or via mobile devices.

In summary, control systems play a vital role in the operation of screw compressors by providing intelligent control, monitoring, and protection. They manage start-up and shutdown sequences, regulate load and unload operation, control pressure and temperature, monitor system parameters, optimize energy efficiency, and enable remote monitoring and control. By effectively managing the compressor’s operation, control systems contribute to reliable performance, energy efficiency, and overall system optimization.

air compressor

What Is a Screw Compressor?

A screw compressor is a type of positive displacement compressor that operates based on the principle of rotary motion. Here’s a detailed explanation:

Working Principle:

A screw compressor consists of two helical rotors, typically called male and female rotors, that rotate in opposite directions within a housing. The rotors have specially designed profiles that interlock with each other, creating a series of compression chambers as they rotate. As the rotors rotate, the volume of these chambers decreases, compressing the air or gas trapped inside.

Compression Process:

As the air or gas enters the screw compressor, it gets trapped between the rotors’ lobes or threads. As the rotors continue to rotate, the trapped air or gas is carried along the length of the rotors and gradually compressed. The compression occurs continuously and smoothly as the air or gas moves from the suction side to the discharge side of the compressor. The interlocking rotors ensure a continuous flow of compressed air or gas without pulsation.

Oil-Injected and Oil-Free Variants:

Screw compressors are available in both oil-injected and oil-free variants. In oil-injected screw compressors, a small amount of lubricating oil is injected into the compression chamber to provide lubrication, cooling, and sealing between the rotors. The oil also helps in reducing friction and minimizing wear. Oil-injected screw compressors are commonly used in various industrial applications where a small amount of oil in the compressed air is acceptable.

On the other hand, oil-free screw compressors are designed to operate without the need for oil lubrication. These compressors use specialized rotor coatings, such as PTFE (polytetrafluoroethylene) or other non-stick materials, to reduce friction and prevent the need for oil. Oil-free screw compressors are often favored in applications where oil-free and contaminant-free compressed air is essential, such as in food and beverage, pharmaceutical, and electronics industries.

Applications:

Screw compressors are widely used in various industries for a range of applications. They are commonly employed in manufacturing plants, refineries, power generation facilities, and other industrial settings to supply compressed air or gas for pneumatic tools, process equipment, air conditioning systems, and more. The ability of screw compressors to deliver a continuous flow of compressed air or gas makes them suitable for applications that require a steady and reliable source of compressed air.

Advantages:

Screw compressors offer several advantages compared to other types of compressors. They provide high efficiency and can deliver a large volume of compressed air or gas. The continuous compression process results in smooth operation with minimal pulsation. Additionally, screw compressors are known for their compact design, low vibration levels, and relatively quiet operation.

In summary, a screw compressor is a rotary positive displacement compressor that uses interlocking helical rotors to compress air or gas. It operates based on a continuous compression process and is available in both oil-injected and oil-free variants. Screw compressors find widespread use in various industries for applications that require a reliable source of compressed air or gas.

China Hot selling Screw Industrial AC Oil Free Used CHINAMFG Zr 75 Air Compressor   with Hot sellingChina Hot selling Screw Industrial AC Oil Free Used CHINAMFG Zr 75 Air Compressor   with Hot selling
editor by CX 2023-10-05

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