What’s Instrumentation Tube Fittings?
Instrumentation Tube Fittings consist of four hydraulic components: Fittings body, nut, front ferrule & back ferrule.
Instrumentation tube fittings are double ferrule type fittings which provide leak-proof, torque-free seals at the tubing connection, which is a type of tubing fitting designed for use in high-pressure and temperature applications, such as process instrumentation and control systems. They are typically made using stainless steel or brass and are able to provide leak-proof and secure connections. Instrumentation tube fittings are available in a variety of sizes, styles, and designs to meet the specific needs of each application.
Instrumentation tube fittings are widely used for applications in a wide range of industries including hydrogen energy, semi-conductor , fluid power, petrochemical, chemical, aerospace, defense, marine and automotive.
QC Hydraulics compression tube fittings is a two-ferrule design to ensure leak-free performance in high pressure instrumentation applications. Our fittings are designed and manufactured to compatible with Swagelok, SSP & Parker. Material available: SS 304 & SS 316L. Size range from 1/8” to 2”.

Specifications Of Tube Fittings:
Working Pressure: 6,000 PSI
Working Temperature: -325 to 1200°F
Fractional Sizes: 1/16”-2”
Metric Sizes: 4mm- 25mm
Thread connection: NPT, JIC/AN, ISO/BSP, SAE/MS, ORFS, ORB, Weld, Tube Stub, Port Connectors
Shapes: Male and female connectors, adapters, reducers, unions, elbows, tees, crosses, caps, plugs, and bulkhead fittings:
Features Of Compression Tube Fittings:
- Live-Loaded, two-ferrule designs
- Easy to install
- No torque is transmitted to tubing during installation
Designs:
- Two-Ferrule, Mechanical Grip Design
- The two ferrules separate sealing and tube gripping
- functions; each ferrule is optimized for its function
The front ferrule creates a seal:
- against the fitting body
- on the tubing outside diameter
- As the nut is turned, the back ferrule:
- axially advances the front ferrule
- radially applies an effective tube grip
Applications of Tube Fittings:
- Aerospace
- Defense
- Power Generation
- Chemical Processing
- Oil & Gas
- Petrochemical
- Alternative Fuels
- Shipping Building
- Medical Equipment
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