Transformer oil filtration plants in India

Transformer oil filtration machine

A transformer oil filtration machine is a specialized equipment used to purify and filter insulating oil in transformers. Transformer oil, also known as insulating oil, is crucial for the efficient operation and insulation of electrical transformers. Over time, transformer oil can become contaminated with moisture, dirt, and other impurities, which can degrade its performance and potentially damage the transformer.

Transformer oil filtration machines employ various techniques to remove impurities from the oil, such as:


The machine typically uses high-quality filters to physically remove solid particles, sludge, and other contaminants from the oil.


Some machines include degassing systems to remove dissolved gases, such as oxygen, nitrogen, and methane, which can degrade the insulating properties of the oil.


Moisture is a common contaminant in transformer oil and can lead to reduced dielectric strength. Transformer oil filtration machines often include dehydration systems, such as vacuum chambers or special absorbent materials, to remove water from the oil.


Heating the oil can help improve the efficiency of filtration and enhance the removal of contaminants.

By effectively removing impurities from transformer oil, filtration machines help extend the lifespan of transformers, improve their performance, and reduce the risk of equipment failure and downtime. Regular maintenance and filtration of transformer oil are essential for ensuring the reliability and safety of electrical power systems.

Single Stage Degassing System

These type of transformer oil filtration & dehydration plants mainly used for filtration of distribution transformers. In these types, machine consists of single stage degassing chamber connected to single vacuum pump with high ultimate vacuum. From these machines, you will achieve the desired results within 3 to 5 passes of oil through the machine.

single stage degassing system
1. Brakdown Voltage with 2.5mm electrode Gap 20Kv 60kv
2. Moisture Content 50-100 Up to < 5-10 ppm
3. Particle Size Visible to Naked eye < 1 micron
4. Gas Content < 10% by volume upto < 0.1% by volume
5. Neutralization value(with IRC option only) 0.5 mg of KOH/gm of oil < 0.05mg of KOH/ gm of oil

Schematic Diagram3

om sai ps enterprises

Technical Data Sheet3

transformer oil filter

Two Stage Degassing Systems

Two-stage degassing systems are designed for quickly filtering and drying transformer oil, especially in power transformers with minimal downtime and a need for fast results. These systems have two stages: the first stage connects to one vacuum pump, while the second stage connects to a combination of vacuum pumps called roots-rotary pumps. This setup creates a vacuum ranging from 0.1 to 0.2 mbar. By passing oil through the machine only 2 to 3 times, you can achieve the desired results.

transformer oil filter plant
1. Brakdown Voltage with 2.5mm electrode Gap 20Kv 60kv
2. Moisture Content 50-100 Up to < 5-10 ppm
3. Particle Size Visible to Naked eye < 1 micron
4. Gas Content < 10% by volume upto < 0.1% by volume
5. Neutralization value 0.5 mg of KOH/gm of oil < 0.05mg of KOH/ gm of oil

Schematic Diagram

transformation oil

Technical Data Sheet

oil filteration

How to Use Frequently Asked Questions?


A Transformer Oil Filtration and Dehydration Plant, also known as a Transformer Oil Purification Plant, is an advanced system designed to remove impurities and moisture from transformer oil, improving its dielectric strength and extending the lifespan of transformers. Here's how such a plant typically works:

1. Initial Inspection and Preparation: Before beginning the filtration and dehydration process, the transformer oil and the transformer itself are inspected to assess the level of contamination and moisture. The transformer may need to be disconnected from power and drained of its oil.

2.Oil Heating: The first step involves heating the transformer oil to a predetermined temperature. Heating the oil helps to reduce its viscosity, allowing contaminants and moisture to be more effectively removed during the filtration process.

3. Filtration: The heated oil is then pumped into the filtration system. The filtration system typically consists of several stages of filtration, including mechanical filters to remove solid particles, such as dirt and carbon, and chemical filters to remove dissolved impurities. These filters are designed to achieve a high level of oil purity.

4. Dehydration:gies such as vacuum dehydration or centrifugal dehydration to remove moisture from the oil. Moisture is a major cause of reduced dielectric strength in transformer oil, so removing it is critical for maintaining the insulation properties of the oil.

5. Degassing: In addition to moisture, dissolved gases such as oxygen, nitrogen, and methane can also degrade the performance of transformer oil. The purified and dehydrated oil is then subjected to a degassing process to remove these gases. This is often accomplished by exposing the oil to a high vacuum, causing the gases to vaporize and be removed from the oil.

6. Testing and Quality Control: Throughout the purification process, the quality of the oil is monitored using sensors and testing equipment. Parameters such as moisture content, dielectric strength, and gas content are measured to ensure that the oil meets specified standards.

7. Return to Transformer: Once the oil has been thoroughly purified, dehydrated, and degassed, it is pumped back into the transformer's reservoir. The transformer can then be refilled with the purified oil, and normal operation can resume.

Transformer Oil Filtration and Dehydration Plants are crucial for maintaining the reliability and efficiency of transformers, especially in high-voltage applications where the integrity of the insulation is critical. Regular maintenance with these plants helps to prevent equipment failure and extend the lifespan of transformers.


A transformer oil filtration machine is a crucial tool for maintaining the health and efficiency of transformers. However, for plants, especially industrial or manufacturing facilities, there are several other essential supplies and equipment needed to ensure smooth operations and safety. Here are some key items:

1. Power Generators: Plants often require backup power generators to ensure uninterrupted operations in case of power outages.

2. Safety Equipment: This includes personal protective equipment (PPE) such as helmets, gloves, goggles, and safety harnesses, as well as fire extinguishers, first aid kits, and emergency alarms.

3. Machinery and Equipment: Depending on the type of plant, various machinery and equipment are necessary for production processes. This might include conveyor belts, industrial ovens, compressors, pumps, and specialized manufacturing machines.

4. Maintenance Tools: Tools for routine maintenance and repairs are essential to keep the plant equipment and machinery in optimal condition. This includes wrenches, screwdrivers, drills, and diagnostic equipment.

5. Raw Materials: Plants need a steady supply of raw materials to produce their goods. This could be anything from metals and plastics to chemicals and agricultural products.

6. Packaging Materials: If the plant produces goods for sale, packaging materials such as boxes, containers, and wrapping materials are necessary to prepare products for distribution.

7. Utilities: Besides electricity, plants require other utilities such as water, gas, and sometimes steam for various processes.

8. Office Supplies: Administrative tasks within the plant require standard office supplies like computers, printers, paper, pens, and office furniture.

9. Environmental Controls: Equipment for environmental control such as HVAC systems, air filters, and waste management systems are important for maintaining a safe and comfortable working environment.

10. Security Systems: Surveillance cameras, access control systems, and security personnel may be necessary to protect the plant from theft, vandalism, and unauthorized access.

These are just some of the supplies and equipment that a plant might need beyond a transformer oil filtration machine. The specific requirements would vary depending on the nature of the plant's operations and its industry.


When selecting a transformer oil filtration machine for a plant, there are several important points to consider to ensure that you choose the right equipment for your needs:

1. Capacity: Determine the capacity of the transformer oil filtration machine needed based on the size and number of transformers in your plant. Ensure that the machine can handle the volume of oil required for regular maintenance and servicing.

2. Filtration Efficiency: Look for a machine with high filtration efficiency to effectively remove contaminants, moisture, and gases from the transformer oil. Consider factors such as micron rating and filtration media to ensure thorough purification.

3. Process Automation: Opt for a machine with automated features such as programmable controls, auto shut-off, and alarms for efficient and safe operation. Automation can help streamline the filtration process and minimize human error.

4. Portability and Mobility: Depending on the layout of your plant and the need for flexibility, consider the portability of the filtration machine. Look for features such as wheels or skids for easy transportation and positioning.

5. Compatibility: Ensure that the filtration machine is compatible with the type of transformer oil used in your plant, as well as the specific requirements of your transformers. Consider factors such as oil viscosity, temperature range, and dielectric strength.

6. Maintenance Requirements: Evaluate the maintenance requirements of the filtration machine, including filter replacement, cleaning, and calibration. Choose a machine with accessible components and easy maintenance procedures to minimize downtime.

7. Quality and Reliability: Select a reputable manufacturer known for producing high-quality and reliable filtration equipment. Consider factors such as warranty coverage, customer reviews, and industry certifications to assess the machine's reliability.

8. Safety Features: Prioritize safety features such as overpressure protection, leak detection, and emergency shutdown systems to prevent accidents and ensure operator safety during operation.

9. Cost-effectiveness: Compare the upfront cost of the filtration machine with its long-term benefits and operational efficiency. Consider factors such as energy consumption, maintenance costs, and potential savings from extended transformer lifespan.

10. Technical Support and Training: Choose a supplier that offers comprehensive technical support, training, and after-sales service to assist with installation, operation, and troubleshooting of the filtration machine.

By considering these points, you can make an informed decision when selecting a transformer oil filtration machine for your plant, ensuring efficient operation and prolonged lifespan of your transformers.


Configuring a transformer oil filtration machine involves setting up the equipment according to the specific requirements of your plant and transformers. Here's a general guide on how to configure the machine:

1. Placement and Setup:
  • Choose a suitable location for the filtration machine within your plant, considering factors such as accessibility, ventilation, and proximity to the transformers.
  • Ensure that the machine is placed on a stable and level surface, with sufficient space for operation and maintenance.

  • 2. Connectivity:
  • Connect the filtration machine to the power supply, ensuring that it meets the voltage and power requirements specified by the manufacturer.
  • If the machine has additional features such as automation or monitoring systems, connect any required sensors, controllers, or communication interfaces.

  • 3. Oil Inlet and Outlet:
  • Identify the oil inlet and outlet ports on the filtration machine.
  • Connect the inlet hose to the transformer oil reservoir or directly to the transformer's oil tank, ensuring a secure and leak-proof connection.
  • Connect the outlet hose to a suitable container or back to the transformer, depending on whether you're draining and replacing the oil or filtering it in situ.

  • 4. Filtration Media:
  • Install the appropriate filtration media or cartridges in the filtration machine, following the manufacturer's instructions.
  • Ensure that the filtration media is correctly seated and securely fastened to prevent leaks or bypass during operation.

  • 5. Settings and Controls:
  • Familiarize yourself with the control panel or interface of the filtration machine.
  • Set the operational parameters such as flow rate, temperature, pressure, and filtration duration according to the recommendations for your transformers and the condition of the oil.
  • If the machine has programmable features, configure any automation settings or scheduling options to optimize the filtration process.

  • 6. Safety Precautions:
  • Review the safety features and precautions outlined in the machine's manual.
  • Ensure that emergency shutdown mechanisms, overpressure relief valves, and other safety devices are functioning properly.
  • Train operators on safe operation procedures, including proper use of personal protective equipment (PPE) and emergency protocols.

  • 7. Testing and Calibration:
  • < Conduct initial testing and commissioning of the filtration machine to verify its performance and functionality.
  • Monitor the filtration process closely during the initial operation to identify any issues or anomalies.
  • Calibrate any sensors or instrumentation as needed to ensure accurate measurement and control of the filtration parameters.

  • 8. Documentation and Maintenance:
  • Keep detailed records of the machine's configuration, operational parameters, and maintenance activities.
  • Develop a regular maintenance schedule for the filtration machine, including routine inspections, filter replacements, and system checks.
  • Train maintenance personnel on proper maintenance procedures and troubleshooting techniques to keep the machine operating efficiently.

  • By following these steps, you can effectively configure a transformer oil filtration machine to meet the specific needs of your plant and ensure the reliable operation and longevity of your transformers.