Stainless steel push-in fittings are the highest-performance material option in Fokca's push-in fitting series, designed specifically for extreme operating conditions. Featuring 304 or 316 stainless steel bodies paired with FKM fluoro rubber seals, they achieve the highest levels of corrosion resistance, high-temperature resistance, and mechanical strength.
Fokca stainless steel push-in fittings have a smooth surface that maintains the natural stainless steel finish. Available with tube ODs from 4mm to 12mm, NPT/BSPP/BSPT threads, and a full range of types including straight, elbow, tee, and bulkhead. When applications exceed the limits of plastic and nickel-plated brass, stainless steel push-in fittings are the most reliable ultimate choice.
In pneumatic piping, plastic push-in fittings are widely used for their convenience and cost-effectiveness. However, in harsh conditions such as high temperature, high pressure, strong corrosion, or food and pharmaceutical environments, plastics may soften or deform under heat, and chemical media can corrode the body. Even standard nickel-plated metal parts may rust or fail in humid or corrosive environments.
Stainless steel push-in fittings are designed for these demanding conditions. Made with a full stainless steel body and high-performance FKM (Viton) seals, they offer excellent resistance to pressure, temperature, and corrosion. At the same time, they retain the push-to-connect convenience—no tools required, simply insert the tube to lock, and press the release ring to disconnect.
| Feature | Plastic Push-in Fittings | Stainless Steel Push-in Fittings |
|---|---|---|
| Body Material | Nickel-plated brass + PBT | 304 / 316 stainless steel |
| Seal | NBR | FKM (Viton) |
| Working Pressure | 0–1.0 MPa | 0–1.5 MPa (max 2.0 MPa) |
| Temperature Range | -10°C ~ 60°C | -20°C ~ 140°C |
| Corrosion Resistance | Moderate | Excellent (acid, alkali, seawater, chemicals) |
| Applications | General automation, electronics, packaging | Food, pharma, chemical, marine, high-temp equipment |
| Cost | Economical | Higher |
| Advantage | Lightweight, low cost | Durable, suitable for harsh environments |
· Durable and corrosion-resistant: Made from high-quality 304/316 stainless steel, resistant to oxidation, moisture, acids, alkalis, and salt spray
· FKM seals for harsh conditions: Excellent resistance to oil, chemicals, and high temperatures, ensuring reliable sealing
· High performance:
o Working pressure: 0–1.5 MPa (max 2.0 MPa)
o Temperature range: -20°C to 140°C
Suitable for high-pressure systems, high-temperature equipment, and steam environments
· Full specifications: Tube OD 4–12 mm, with BSPP (G), BSPT (R), and NPT threads
· Wide range of types: Straight, elbow, tee, bulkhead, reducer, plug, etc.
· Reliable quality: Tested for pressure, leakage, and high-temperature aging to ensure long-term stability
· Customization: Laser marking and custom packaging available
· Tube cutting: Cut tubing vertically with a proper cutter, ensuring a clean, burr-free edge
· Insertion & removal: Fully insert the tube and pull gently to confirm locking; press the release ring to remove
· Bend radius: Avoid tight bends to prevent side load
· Avoid rotation: Do not rotate the fitting after installation to prevent seal distortion
· Media compatibility: Ensure compatibility with stainless steel and FKM seals (FKM is resistant to oil, chemicals, and high temperatures, suitable for most industrial media)
Q1: How to choose between 304 and 316 stainless steel?
A:
· 304: Suitable for general food, pharmaceutical, and clean environments
· 316: Contains molybdenum, offering better resistance to seawater and chemicals, ideal for marine and highly corrosive environments
Q2: Can stainless steel push-in fittings be used for high-temperature steam?
A: Yes. FKM seals withstand up to 140°C, and with a 316 stainless steel body, they are suitable for steam applications.
Q3: Are they suitable for the food industry?
A: Yes. 304/316 stainless steel meets hygiene requirements, and FKM seals are oil- and heat-resistant, suitable for food processing systems.
Q4: Do they require maintenance?
A: Stainless steel offers long service life with minimal maintenance. Periodically check seal condition and replace if aging is detected.
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