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What Is A Basket Type Strainer And How Do They Work?

Basket Type Strainer

What Is a Basket Type Strainer?

Basket type strainers are essential filtration devices used in various industries to remove impurities from liquids and protect equipment from damage. They are designed to capture solid particles and debris, ensuring the smooth operation of pipelines and systems. In this article, we will explore the functionality and benefits of basket type strainers, their working principle, and their applications in different industries.

In fluid handling systems, it is crucial to prevent the flow of contaminants such as debris, dirt, scale, and other solid particles. Basket type strainers are mechanical devices used to achieve this objective. They act as filters, intercepting and removing unwanted particles from the liquid stream. By doing this, they protect heat exchangers, pumps, valves, and other delicate machinery from possible harm.

The Purpose of Basket Type Strainers

A basket type strainer’s main function is to offer dependable and effective filtering. They are especially made to deal with high flow rates and remove solid contaminants that could damage machinery or impair system operation. The strainer aids in preserving the fluid being processed’s purity by getting rid of these impurities.

Components of a Basket Type Strainer

A typical basket type strainer consists of the following components:

Strainer Body: The main housing that contains the straining elements and provides a pathway for the fluid flow.

Basket: A removable or integral mesh or perforated screen where the contaminants are trapped.

Cover: The top part of the strainer body that allows access to the basket for cleaning and maintenance.

Inlet/Outlet Connections: The points where the fluid enters and exits the strainer.

Drain/Vent Connections: Optional connections used for draining and venting the strainer during maintenance.

Working Principle of Basket Type Strainers

Basket type strainers work on a simple yet effective principle. The fluid enters the strainer body through the inlet connection and flows through the basket. As the liquid passes through the perforations or openings in the basket, solid particles are trapped, while the clean fluid continues its journey through the outlet connection.

Pressure drop over the strainer rises with time as pollutants are accumulated in the basket. The basket is taken out of the strainer body when the pressure reaches a specific point, signaling the necessity for cleaning. The basket is then reinstalled once the trapped debris has been manually or mechanically cleaned.

Types of Basket Type Strainers

Basket type strainers come in various designs to accommodate different applications. Some common types include:

Simplex Basket Strainers: These strainers have a single basket and are used in applications where temporary interruption of flow during maintenance is acceptable.

Duplex Basket Strainers: Duplex strainers consist of two parallel strainer bodies connected by a diverter valve. This design allows continuous operation by diverting the flow to the clean strainer while the other is being cleaned.

Y-Type Basket Strainers: Y-strainers have a Y-shaped configuration, offering low-pressure drop and easy maintenance. They are commonly used in pipelines with limited space.

Customized Basket Strainers: Depending on the specific requirements of an application, basket type strainers can be customized in terms of material, mesh size, connection type, and pressure ratings.

Benefits of Using Basket Type Strainers

The utilization of basket type strainers provides several benefits, including:

Equipment Protection: By capturing solid particles, basket strainers prevent clogging, corrosion, and damage to downstream equipment, extending their lifespan.

Enhanced System Efficiency: Strainers help maintain the efficiency of pumps, valves, and other equipment by preventing the accumulation of debris that can impede flow or cause blockages.

Improved Product Quality: Strainers remove contaminants that could adversely affect the quality of the final product, ensuring consistent output and customer satisfaction.

Reduced Maintenance Costs: Regular use of strainers minimizes the need for extensive system maintenance, saving both time and money in the long run.

Environmental Compliance: Strainers play a crucial role in preventing pollutants from being discharged into the environment, helping industries meet regulatory requirements.

Applications of Basket Type Strainers

Basket type strainers find applications in a wide range of industries, including:

  • Oil and Gas
  • Chemical Processing
  • Power Generation
  • Water Treatment
  • Food and Beverage
  • Pharmaceutical
  • Pulp and Paper
  • Marine and Shipbuilding

Their versatility and effectiveness in removing various types of solids make them a vital component in fluid handling systems across these industries.

Maintenance and Cleaning

To ensure the proper functioning of basket type strainers, regular maintenance and cleaning are essential. This involves monitoring pressure differentials, scheduling cleaning intervals, and inspecting the baskets for wear and tear. When cleaning the basket, it is important to follow the manufacturer’s guidelines and use suitable cleaning agents that do not damage the screen or the strainer body.


Basket type strainer play a crucial role in maintaining the integrity and efficiency of fluid handling systems. By capturing solid particles and debris, they protect valuable equipment, enhance system performance, and ensure the production of high-quality products. Understanding their working principle, benefits, and applications can assist industries in choosing the appropriate strainer for their specific needs.


Q: How often should the basket type strainer be cleaned?

A: The frequency of cleaning varies depending on the fluid type, the amount of pollutants, and the operational circumstances. The appropriate cleaning intervals can be determined with regular monitoring of pressure differentials.

Q: Can basket type strainers handle high-pressure applications?

A: Yes, basket type strainers are available in different pressure ratings to accommodate high-pressure applications. It is important to select a strainer that meets the specific pressure requirements of the system.

Q: Can basket type strainers remove all types of contaminants?

A: Basket type strainers are effective in capturing solid particles and debris. However, for specific applications involving fine particles or chemical impurities, additional filtration techniques may be necessary.

Q: Are basket type strainers easy to install?

A: Yes, basket type strainers are designed for easy installation. They typically come with standard pipe connections, allowing for straightforward integration into the pipeline or system.