FOR SALE USED SCREW COMPRESSOR. BRAND KAESER. BDS 62 MODEL. COMPLETE WITH BOOKLET INDICATING THE LATEST MAINTENANCE PERFORMED.  

## Introduction

The **Kaeser BDS 62 screw compressor** is an industrial machinery used for the production of compressed air, fundamental in numerous industrial applications such as production, manufacturing, automotive and many other sectors. Buying a used screw compressor like the Kaeser BDS 62 can offer numerous benefits in terms of cost and operational efficiency. In this guide, we will explore how this type of compressor works, how to use it correctly, the different types of compressors available, the main applications, the alternatives on the market and the reasons why it is worth buying a used model like the Kaeser BDS 62.

## 1. **How ​​a Kaeser BDS 62 Screw Compressor Works**

### Operating Principle

The **screw compressor** is a type of rotary positive displacement compressor that uses two intertwined screw rotors to compress air. In the case of the **Kaeser BDS 62**, operation occurs as follows:

1. **Air Suction**: The ambient air is sucked through a suction filter which eliminates impurities and particles.
2. **Compression**: Air enters the compression chamber where two screw rotors (male and female) rotate in opposite directions. The movement of the rotors reduces the volume of the chamber, compressing the air inside it.
3. **Oil Cooling and Separation**: During compression, oil is injected to lubricate, seal and cool the rotors. Next, the compressed air passes through a separator which removes the oil from the air.
4. **Post-Treatment**: The compressed air can be further cooled and filtered to remove residual moisture and particles, making it suitable for various applications.
5. **Exhaust**: The clean, dry compressed air is then stored in a tank or distributed directly to the point of use.

### Features of the Kaeser BDS 62

- **Air Flow Capacity**: The BDS 62 model offers a significant air flow rate, suitable for medium to large industrial applications.
- **Energy Efficiency**: Designed to operate with optimized energy consumption, reducing operating costs.
- **Reliability**: Kaeser compressors are known for their robust construction and long operating life.
- **Control System**: Equipped with a control panel that automatically monitors and adjusts operating parameters to ensure optimal performance.

## 2. **How ​​to use it**

### Installation

1. **Positioning**: The compressor must be installed on a flat and stable surface, in a well-ventilated area and easily accessible for maintenance.
2. **Electrical Connections**: Connect the compressor to an adequate electrical supply, ensuring that the voltage and frequency are compatible with the specifications of the machinery.
3. **Air Connections**: Connect the compressed air outlet to the distribution system or storage tank.
4. **Checking Oil Levels**: Check that the oil level complies with the instructions in the operating manual.

### Operation

1. **Startup**: Turn on the compressor using the control panel. The system will perform a self-diagnosis before starting the operation.
2. **Parameter Setting**: Configure the desired working pressure and other operating parameters according to the specific needs of the application.
3. **Monitoring**: During operation, constantly monitor parameters such as pressure, temperature and oil level through the control panel display.
4. **Shutdown**: At the end of the operation, turn off the compressor following the procedures indicated in the manual to ensure a safe shutdown.

### Maintenance

- **Oil Change**: Change the oil at the specified maintenance intervals to ensure adequate lubrication.
- **Filter Cleaning**: Clean or replace air and oil filters regularly to maintain operational efficiency.
- **Component Inspection**: Perform periodic inspections of rotors, seals and other critical components to prevent sudden failures.
- **Check Connections**: Periodically check all electrical and mechanical connections to ensure they are secure and free of leaks.

## 3. **Types of Screw Compressors**

### Based on Lubrication

- **Oil-Injected Screw Compressors**: They use oil to lubricate and cool the rotors during compression. Suitable for most industrial applications.
- **Oil-Free Screw Compressors**: They do not use oil in the compression process, guaranteeing compressed air free of oily contamination. Ideal for sensitive applications such as in the food, pharmaceutical and electronics industries.

### Depending on the Cooling System

- **Air Cooled**: Use ambient air to cool the system. They are simpler and require less maintenance.
- **Water Cooled**: Use water for cooling, offering better thermal efficiency. Suitable for applications with high cooling requirements.

### Based on Speed ​​Control

- **Fixed Speed**: Operate at a constant speed, ideal for applications with stable compressed air demand.
- **Variable Speed ​​(VSD)**: They automatically adjust the motor speed based on the demand for compressed air, improving energy efficiency.

## 4. **Applications and Workable Materials**

**Screw compressors** such as the Kaeser BDS 62 are used to supply compressed air needed in a wide range of industrial applications, including:

- **Manufacturing Industry**: Supply of pneumatic tools, assembly lines, painting and sandblasting systems.
- **Food and Beverage Industry**: Packaging, bottling and process control operations.
- **Pharmaceutical Sector**: Production processes, environmental control and instrumentation.
- **Chemical and Petrochemical Industry**: Transport of materials, process control and supply of equipment.
- **Construction**: Powering jackhammers, drills and other construction equipment.
- **Automotive sector**: Painting, assembly and quality control.

## 5. **Reciprocating Machinery**

### Reciprocating Compressors

- **Piston Compressors**: They use pistons to compress the air. They are more suitable for applications requiring low quantities of compressed air and have lower initial costs, but less efficient and noisier than screw compressors.
  
### Scroll compressors

- **Spiral (Scroll) Compressors**: They use two spirals to compress the air. They are quiet and compact, ideal for applications requiring clean, low-volume compressed air.

### Centrifugal Compressors

- **Dynamic (Centrifugal) Compressors**: Use a high-speed rotating impeller to accelerate and compress the air. Suitable for applications requiring large volumes of compressed air at moderate pressures.

## 6. **Why it is better to buy a used Kaeser BDS 62 screw compressor**

### Economic Advantages

- **Lower Cost**: Purchasing a used compressor significantly reduces the initial investment compared to purchasing a new machine.
- **Reduced Depreciation**: A used machinery has already suffered most of the depreciation, maintaining its value better over time.

### Reliability and Quality

- **Kaeser Build Quality**: Kaeser is renowned for producing high quality and reliable compressors. A used model like the BDS 62 can still offer excellent performance if well maintained.
- **Durability**: Screw compressors are designed to last over time. A used model, if subjected to regular maintenance, can operate effectively for many years.

### Immediate availability

- **Reduced Delivery Time**: A used compressor is generally available immediately, avoiding the waiting times associated with ordering and manufacturing a new machine.

### Environmental Sustainability

- **Reduction of Environmental Impact**: Reusing used machinery contributes to the reduction of industrial waste and the environmental impact linked to the production of new machinery.

### Tested and Verified

- **Proven Performance**: A used compressor has already demonstrated its operational reliability. Furthermore, any manufacturing defects have probably already been identified and corrected.

### Support and Maintenance

- **Availability of Spare Parts**: Kaeser provides excellent after-sales support and easy availability of spare parts, facilitating the maintenance and repair of used models such as the BDS 62.
- **Widespread Technical Knowledge**: Being a widespread model, it is easier to find qualified technicians and detailed information for the maintenance and correct use of the machinery.

## Conclusion

Purchasing a **used Kaeser BDS 62 screw compressor** represents a smart choice for companies looking to optimize costs without compromising quality and operational efficiency. Thanks to its reliability, energy efficiency and versatility, this machinery can satisfy a wide range of industrial needs. It is essential, however, to ensure that your used compressor has been well maintained and to check its operating condition before purchasing, possibly with the assistance of a qualified technician. With the right precautions, a used compressor like the Kaeser BDS 62 can offer excellent value for money and contribute significantly to company productivity.