Which type of fitting is commonly used for connecting tubing to a modular junction?

The commonly used fitting for connecting tubing to a modular junction is the bulkhead fitting. Bulkhead fittings are designed to create a secure and leak-proof connection between two sections of tubing or piping, particularly when passing through a panel, wall, or other barrier. The design allows the tubing to be securely anchored while maintaining the integrity of the system, making it an ideal choice for modular junction connections.

Bulkhead fittings are advantageous in maintaining a clean and organized system, ensuring that the connections remain stable even under varying pressures or conditions. Additionally, they facilitate easy access for maintenance or replacement, which is essential in instrumentation systems where reliability is crucial.

In contrast, screw fittings are typically threaded and used for direct connections where a tight seal is required without the need to pass through barriers. Compression fittings create tight seals by mechanically compressing a ring onto the tubing, suitable for securing two tubes together but may not provide the right application for modular junctions as effectively as bulkhead fittings. Welded fittings are used for permanent connections and are not suitable for modular setups as they cannot be easily disassembled for maintenance or modifications.