Pneumatic push-in fittings—also commonly referred to as pneumatic push-to-connect fittings or one-touch pneumatic fittings—are essential components designed for rapid, leak-free connections with pneumatic air tubing. These versatile pneumatic fittings simplify the assembly and maintenance of pneumatic systems, making them a staple in industrial applications.
How Do Pneumatic Push-In Fittings Work?
At the core of a pneumatic push-in fitting lies a clever design: an internal lock claw and an NBR material sealing ring. When a pneumatic tubing is inserted into the fitting, the sealing ring instantly wraps around the tubing to create an airtight seal, preventing leaks. Simultaneously, the lock claw firmly grips the tubing, ensuring a secure connection that resists accidental disconnection.
Disconnecting is just as effortless: simply press the button or sleeve on top of the pneumatic push-in fitting, and the tubing can be smoothly pulled out. This tool-free operation makes installation, adjustments, and maintenance quick and hassle-free.
Construction of Pneumatic Push-In Fittings
A high-quality pneumatic push-in fitting is crafted from durable materials to ensure reliability:
The threaded portion is typically made of nickel-plated brass, offering corrosion resistance and strength.
The fitting body is constructed from PBT (polybutylene terephthalate), a robust plastic known for its rigidity and chemical resistance.
The lock claw is usually made from SUS316 stainless steel, providing the strength needed to hold tubing securely.
The push button is fabricated from POM (polyformaldehyde), a material valued for its low friction and wear resistance.
Key Characteristics of Pneumatic Push-In Fittings
Pneumatic push-in fittings stand out for their practical features, making them a top choice for pneumatic systems:
Easy to operate: Tool-free connection and disconnection save time and reduce labor costs.
Convenient maintenance: Quick tubing changes simplify repairs and system modifications.
Leak resistance: Precision-engineered seals ensure reliable, long-term leak prevention.
Compact and lightweight: Small size and low weight make them ideal for tight spaces.
Versatile specifications: Available in a wide range of styles, sizes, and colors to suit diverse needs.
Multiple thread options: Compatible with common standards like PT, BSP, NPT, and Metric threads.
Technical Parameters of Pneumatic Push-In Fittings
To ensure compatibility with your system, note these key parameters of pneumatic push-in fittings:
Working pressure: 0~10bar (suitable for vacuum applications and water systems; for corrosive environments, we recommend stainless steel push-to-connect fittings instead).
Working temperature: 0~60℃.
Application medium: Compatible with compressed air, gases, water, and more.
Applicable tubing: Works with PU, nylon, PE, and PVC tubes (tubing must have moderate hardness—overly soft or rigid tubing may loosen and is not suitable for pneumatic push-in fittings).
