In gas and fluid systems, reliable connections are non-negotiable. Whether you’re working in high-pressure, high-temperature, or high-vibration environments, the performance of your fittings can make or break your system’s integrity. That’s why at NVFCL, we’re proud to supply FITOK Double Ferrule Fittings—engineered for safety, consistency, and long-term reliability.

Here’s a breakdown of the key features and benefits that make these fittings a trusted choice across industries worldwide.

Key Features of FITOK Double Ferrule Fittings

1. High-Quality, Traceable Materials

All components are machined from premium, traceable bar stock, ensuring strength, durability, and suitability for demanding environments.

2. Consistent Gaugeability

Forget complex torque charts. These fittings allow for easy and consistent installation across various tubing wall thicknesses and hardness levels.

3. Standard Installation Procedure

A simple, standardised process helps promote safety while reducing installation time and cost.

4. No Special Tools Required

You only need standard open-ended spanners—no torque wrenches, flaring tools, or special equipment necessary.

5. Easy, Error-Free Assembly

There’s no need to disassemble the fitting before use, reducing the risk of damage or losing components during installation.

6. Unique Ferrule Action

The dual ferrule design reduces the need for high torque pull-up, making installation more manageable and less physically demanding.

7. Durable and Reusable

These fittings swage the tubing without harming sealing surfaces, allowing for multiple remakes without compromising performance.

8. Vibration and Impulse Shock Resistance

Enhanced tube support and sealing integrity protect your system from leaks under extreme conditions.

9. Fatigue Failure Prevention

The back ferrule acts as a “slip washer,” helping eliminate rotary motion and minimising the risk of early fatigue failure.

10. Broad Tube Compatibility

Compatible with various tubing materials and wall thicknesses. No inserts are required (except for very soft tubing like nylon).

11. Superior Sealing Performance

Extended contact between sealing surfaces improves leak resistance, even under tough conditions.

12. Thermal Cycling Resilience

The fittings maintain sealing contact through temperature fluctuations, making them ideal for systems exposed to thermal cycling.

13. Anti-Galling Protection

Silver-plated internal threads prevent galling, extending the life of the fitting.

14. Pressure and Vacuum Compatibility

These fittings work seamlessly across various pressure and vacuum conditions, reducing the need for multiple fitting types.

Benefits That Make a Difference

• Safety: Standard procedures and gaugeability reduce errors, promoting safer system operation.
• Cost-Effectiveness: Faster installs and reusable components save time and money.
• Versatility: Ideal for a range of applications—from clean gases to high-impulse fluids.
• Reliability: Proven performance in the harshest conditions, backed by extensive testing.
• Ease of Use: No special tools or prep work is required, making them accessible for any technician.
• High Performance: Leak-tight under pressure, vibration, and thermal changes.
• Proven Trust: FITOK is a trusted name, with global approvals and industry-wide adoption.

FITOK Double Ferrule Fittings are engineered for reliability, safety, and ease of use. Their durable construction, consistent installation process, and high sealing performance make them an ideal choice for demanding gas and fluid system applications. Whether you’re working in a high-pressure, high-vibration, or thermally dynamic environment, these fittings offer long-term peace of mind and operational efficiency.