Festo PU Tube PUN-H-3 x 0.5 NT

Festo Part No. 197375 | PUN-H-3X0,5-NT

Product Overview

The Festo PUN-H-3X0,5-NT is a compact polyurethane pneumatic tube designed for flexible and reliable routing of compressed air in industrial automation and pneumatic systems. With a 3 mm outside diameter and 2.1 mm inside diameter, this tubing is particularly suitable for compact pneumatic installations where limited space, flexibility and controlled tube routing are important.

Manufactured from ether-based TPE-U polyurethane, the PUN-H series is designed for demanding pneumatic applications and is suitable for energy-chain installations, including applications involving high cycle rates. The natural-colour construction provides a clean, unobtrusive appearance for machine and automation installations.

The tube can be used with compatible push-in pneumatic fittings designed for 3 mm outside-diameter tubing, making it suitable for compact valves, actuators, manifolds, sensors and other pneumatic components.

Key Features

• Genuine Festo PUN-H series pneumatic tubing
• Festo Part No. 197375
• 3 mm outside diameter
• 2.1 mm inside diameter
• 0.5 mm nominal wall specification
• Natural colour
• Flexible ether-based TPE-U polyurethane construction
• Suitable for energy-chain applications
• Designed for high-cycle-rate applications
• Minimum bending radius: 6 mm
• Flow-relevant bending radius: 12 mm
• Suitable for compressed-air applications
• Temperature-dependent operating pressure up to 10 bar
• Ambient temperature range: -35 °C to +60 °C
• RoHS compliant
• TÜV certification listed by Festo

Technical Specifications

Technical values above are based on Festo's current product data for Part No. 197375.

Flexible Pneumatic Tube for Compact Installations

The small 3 mm outside diameter of the PUN-H-3X0,5-NT makes it well suited to pneumatic systems where installation space is limited. Its polyurethane construction allows the tube to be routed through compact machine layouts while maintaining the flexibility required for practical pneumatic installation.

The specified 6 mm minimum bending radius allows tight routing, while the 12 mm flow-relevant bending radius should be considered when maintaining pneumatic flow performance is important.

Suitable for Dynamic Applications

Festo identifies the PUN-H tubing family as suitable for energy-chain applications. The PUN-H-3X0,5-NT is therefore appropriate for pneumatic systems where tubing may be routed through moving machine sections or other applications involving repeated movement.

This makes it useful in automation machinery, robotic equipment, handling systems and other applications where pneumatic tubing needs to accommodate controlled movement.

Pneumatic Compatibility

The PUN-H-3X0,5-NT is intended for use with pneumatic push-in fittings designed for 3 mm outside-diameter tubing. The small tube diameter makes it particularly suitable for compact pneumatic connectors and miniature pneumatic components.

For reliable installation, the tube should be cut cleanly and squarely before insertion into the fitting. The tube should be pushed fully into the connector and checked for secure retention before the pneumatic circuit is pressurised.

Typical Applications

The Festo PUN-H-3X0,5-NT can be used in applications such as:

• Industrial automation systems
• Pneumatic control circuits
• Compact pneumatic valves
• Small pneumatic actuators
• Pneumatic manifolds
• Sensors and instrumentation
• Robotic systems
• Pick-and-place machinery
• Machine-building equipment
• Energy-chain pneumatic installations
• High-cycle automation applications
• Compact compressed-air distribution

Installation Guidelines

1. Cut the tube squarely using an appropriate pneumatic-tube cutter.
2. Ensure that the tube end is clean and free from burrs or deformation.
3. Insert the tube fully into a compatible 3 mm push-in fitting.
4. Perform a gentle pull test to confirm that the tube is securely retained.
5. Avoid sharp bends below the specified minimum bending radius.
6. Where flow performance is important, consider the 12 mm flow-relevant bending radius.
7. Protect the tubing from sharp edges, excessive abrasion and environmental conditions outside its specified limits.
8. Confirm the actual pressure, temperature and operating-medium requirements before commissioning.

Why Choose Festo PUN-H-3X0,5-NT?

The PUN-H-3X0,5-NT is a practical choice for applications requiring small-diameter, flexible pneumatic tubing. Its compact dimensions, polyurethane construction and suitability for dynamic routing make it particularly useful in modern automation equipment where installation space and tube flexibility are important.

Its 3 mm outside diameter also makes it a useful option for compact pneumatic assemblies using appropriately sized push-in fittings.