When selecting a push-in fitting, choosing the right shape is only half the battle. The material it’s made from—Plastic, Brass, or Stainless Steel—is a critical decision that impacts durability, performance, and cost. Each material is engineered for a specific set of operating conditions. This guide will help you understand the key differences and choose the perfect material for your pneumatic application.
Plastic (PBT) Push-in Fittings: The Versatile StandardPlastic push-in fittings, typically made from robust Polybutylene Terephthalate (PBT), are the most common and versatile choice for general-purpose industrial automation.Best For ：Standard pneumatic circuits, automated machinery, robotics, and applications where light weight and corrosion resistance in non-chemical environments are important.
Key Advantage： Excellent value, easy to use, and available in the widest variety of shapes and colors.
| Working Pressure | 0 ~10 BAR |
| Negative Pressure | -100KPa (10Torr) |
| Guaranteed Pressure | 15 BAR |
| Working Temperature | 0~60 °C |
Brass (Nickel-Plated) Push-in Fittings: The Heavy-Duty Workhorse
For applications that demand a higher level of durability, our nickel-plated brass push-in fittings are the perfect upgrade. The all-metal construction provides superior strength and resilience.
Best For: Heavy-duty industrial environments, automotive workshops, welding applications, and systems with high vibration or risk of physical impact.Key Advantage: Significantly more robust than plastic, with a higher temperature rating and resistance to sparks and abrasion.
| Working Pressure | 0 ~15 BAR |
| Guaranteed Pressure | 16 BAR |
| Working Temperature | -20~+80 °C |
316 Stainless Steel Push-in Fittings: The Ultimate in Performance
When the environment is harsh and performance is non-negotiable, 316 Stainless Steel (SS316) is the undisputed champion. These fittings are engineered for the most demanding applications where purity and resistance are paramount.
Best For: Food & beverage processing, pharmaceutical and medical applications, chemical plants, marine environments, and any system subject to frequent, corrosive washdowns.
Key Advantage: The ultimate resistance to corrosion, chemicals, and high temperatures. The only choice for hygienic or sanitary applications.
| Fluid medium | Air,Water,Steam,Liquid |
| Working Pressure | 0 ~10 BAR |
| Guaranteed Pressure | 15 BAR |
| Working Temperature | -20~140 °C |
Our Commitment to Quality: From Raw Material to Final Test
At LYHY, we don’t just sell fittings—we ensure the quality through a meticulous manufacturing process. Every fitting, regardless of material, is a product of precision engineering and rigorous quality control.
Quick Comparison Chart
| Feature | Plastic (PBT) | Brass (Nickel-Plated) | 316 Stainless Steel |
| Durability | Good | Excellent | Ultimate |
| Temperature | Standard (60°C) | Higher (80°C) | Highest (140°C+) |
| Corrosion | Good (General) | Good | Ultimate (Chemicals, Salt) |
| Best Use | General Automation | Heavy-Duty, Vibration | Hygienic, Corrosive |
