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The CEJN 10 320 2455 is a pneumatic safety coupler designed for compressed air systems requiring high-flow performance and secure, reliable connections. Built to Series 320 specifications, this coupler features a 1/4-inch body diameter and a 1/2-inch MNPT threaded connection, making it a practical replacement or addition in industrial and commercial air tool setups. The body is constructed from brass and steel with a zinc finish for corrosion resistance. Rated to a maximum working pressure of 230 psi and a temperature range of -4 degrees F to 212 degrees F, it is suited for demanding shop and field environments. Licensed HVAC techs, industrial mechanics, and equipment service professionals are typical installers.
This coupler is appropriate for use in pneumatic systems where a High Flow interchange standard is required. It fits applications with a 1/2-inch inside diameter hose and a 1/2-inch MNPT threaded port. Common install scenarios include air compressor manifolds, pneumatic tool drops, and production line quick-connect stations where high-volume airflow and pressure retention are priorities. The safety coupler design helps prevent accidental disconnection under pressure, which is a critical factor in high-cycle industrial environments.
Designed as an OEM-style replacement or upgrade for pneumatic systems using the High Flow interchange standard with 1/2-inch MNPT threaded ports.
Installation should be performed by a qualified mechanic or pneumatic system technician. Always depressurize the air line completely before disconnecting or installing couplers. Use appropriate thread sealant on MNPT connections and verify the joint is leak-free before returning the system to service. Ensure the coupler rating meets or exceeds the maximum system pressure before installation.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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