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|Published Aug 14, 2024|Updated Aug 16, 2024|4 MIN READ

Choosing the Right One Touch Fittings

Choosing the right fittings for your pneumatic systems can significantly impact efficiency and performance. One touch fittings, also known as quick connect or push-to-connect fittings, offer a seamless solution for connecting air hoses and tubes. However, with many options available how can you choose the best ones for your needs? This guide will take you through the fundamentals of One Touch Fittings, from understanding their various types to installation guidance and choosing the ideal fittings for your needs.

Understanding One Touch Fittings

One Touch Fittings are designed to make connecting and disconnecting tubes in pneumatic systems quick and simple. These fittings, such as those provided by SMC, enable secure connections without the need for additional tools. Simply putting the tubing into the fitting creates a reliable connection that provides excellent performance in a variety of industrial applications.

Types of One Touch Fittings

Selecting the right type of SMC One Touch Fitting is crucial for optimal performance. Here are the main types available:

KQ2 Series

The KQ2 Series is the standard One Touch Fittings designed for a wide range of pneumatic applications. They provide a reliable and efficient connection for various tubing sizes.

KQ2 Series

KQG2 Series

KQG2 Series fittings are made of stainless steel, offering higher corrosion resistance. They are suitable for applications in harsh environments where durability is crucial.

KQG2 Series

KR Series

The KR Series is designed for smaller diameter tubes and is ideal for compact spaces. These fittings ensure a secure connection even in the most confined areas.

KR Series

KA Series

KA Series fittings are built for applications requiring higher pressure resistance. They are robust and provide a secure connection under high-pressure conditions.

KA Series

KP Series

KP Series fittings are miniature One Touch Fittings, perfect for applications where space is limited. Despite their small size, they offer reliable performance.

KP Series

KE Series

KE Series fittings are compatible with soft nylon and polyurethane tubing. They are designed to provide a secure and leak-free connection with flexible tubing materials.

KE Series

KG Series

KG Series fittings are ideal for high-speed operations. They are designed to handle rapid connection and disconnection cycles efficiently.

KG Series

KC Series

KC Series fittings are tailored for cleanroom environments. They ensure that the connections meet the stringent cleanliness standards required in such settings.

KC Series

KQB2 Series

KQB2 Series fittings offer an economical option without compromising on reliability. They provide a cost-effective solution for standard pneumatic applications.

KQB2 Series

Key Factors to Consider

When choosing One Touch Fittings, consider the following factors to ensure they meet your specific needs:

Material Compatibility

Ensure that the fitting material is suitable with the tube and media being carried. Different materials provide varying degrees of durability and chemical resistance, which is critical for system integrity.

Pressure and Temperature Rating


Check the fittings' maximum operational pressure and temperature ratings. These ratings guarantee that the fittings will resist the operational demands of your system without fail.

Size and Configuration

Choose the appropriate size and configuration based on your application's requirements. To prevent leaks and maintain a secure connection, the fitting size should be the same as the tubing.

Ease of Installation

Choose fittings that are straightforward to install and maintain. One Touch Fittings are intended for rapid and tool-free connections, which saves time and reduces the possibility of installation problems.

How to Install One Touch Fittings

Installing One Touch Fittings is straightforward. Follow these steps for a secure connection:

  1. Cutting the Tubing: Cut the tubing straight and neatly to avoid distortion, which could result in incorrect sealing. For best results, use an appropriate tube cutter.
  2. Inserting the Tubing: Insert the tubing directly into the One Touch fitting until it stops. Once placed, gently tug on the tubing to make a good connection.
  3. Removing the Tubing: To remove the tubing, press down on the fitting's release button and pull it out while keeping the button pressed.

For specific details, such as installation for different series of SMC One Touch Fittings or additional precautions, please refer to the "Series Catalogue" document available on the product page of the one touch fittings that best suits your needs.


One Touch Fittings are a vital part of any pneumatic system, offering quick and reliable connections. Whether you're installing new fittings or upgrading your current setup, SMC's range of One Touch Fittings provides the perfect solution. For more information, visit Proax Technologies or contact our experts today.

If you need assistance choosing the right One Touch Fittings for your application, our team at Proax Technologies is here to help. Contact us today for expert advice and high-quality products.

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