Compression Fittings

• Compression Bulkhead Fittings
• Compression Elbow Fittings
• Compression Fitting Ferrules
• Compression Fitting Tube Inserts
• Compression Tube Nuts
• Compression Union Fittings

Compression fittings are commonly used components in the fields of tube fittings, industrial scientific applications, hydraulics, pneumatics, and plumbing. They are designed to connect two pieces of tubing or pipe securely and create a leak-tight seal without soldering, welding, or using adhesives. Here's what you should know about compression fittings:

1. Components: Compression fittings typically consist of several components:

   • Body: The main body of the fitting, often made of brass, stainless steel, or other materials, contains the threaded connection for attaching to the tubing or pipe.
   • Nut: The nut is used to secure the tubing within the fitting by compressing a ferrule onto the tubing when tightened.
   • Ferrule: Ferrules are small, tapered rings made of metal or plastic that are compressed onto the tubing when the nut is tightened. They create a seal between the tubing and the body of the fitting.

2. Sealing Mechanism: Compression fittings create a seal by compressing the ferrule around the tubing or pipe, effectively preventing leakage.The compression action is achieved when the nut is tightened onto the body.

3. Types of Compression Fittings:

   • Single Ferrule Fittings: These fittings have one ferrule that is compressed onto the tubing when the nut is tightened.
   • Double Ferrule Fittings: Double ferrule fittings have two ferrules - a front ferrule and a back ferrule. The front ferrule provides a strong seal, while the back ferrule provides additional support and prevents over-tightening.

4. Materials: Compression fittings are available in various materials to suit different applications. Common materials include brass, stainless steel, copper, and plastics. The choice of material depends on factors like the type of fluid being conveyed, temperature, and corrosion resistance requirements.

5. Applications:

   • Plumbing: Compression fittings are commonly used in residential and commercial plumbing applications to connect water supply lines and fixtures.
   • Hydraulics and Pneumatics: In hydraulic and pneumatic systems, compression fittings are used to connect tubes or hoses carrying fluids or gases under pressure.
   • Instrumentation: These fittings are prevalent in scientific and industrial instrumentation systems where precise fluid control and leak-free connections are crucial.
   • Refrigeration: Compression fittings are used in refrigeration systems to connect copper tubing for refrigerant lines.
   • Natural Gas and Propane: They are also used for gas lines in homes and commercial buildings.

6. Advantages:

   • No need for soldering or welding, making installation easier.
   • Can be disassembled and reassembled without damaging components.
   • Provide a reliable and leak-free connection when properly installed.

7. Installation: Proper installation is essential for the effectiveness of compression fittings. It involves inserting the tubing or pipe into the fitting, sliding the ferrule(s) over the tubing, and tightening the nut securely.

8. Limitations: Over-tightening compression fittings can lead to damage and leaks. It's crucial to follow manufacturer guidelines for torque values during installation.

Compression fittings are versatile and widely used for various fluid and gas handling applications, offering a reliable and straightforward method for connecting tubes and pipes while maintaining a leak-tight seal.