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The PARKER 394PSS-4-4 is a single end shutoff bulkhead coupler designed for compression tube connections in fluid and gas distribution systems. Constructed from 316 stainless steel, this fitting provides corrosion resistance suitable for demanding industrial and mechanical service environments. It features a compression x compression end connection configuration and is rated for a maximum working pressure of 150 psi. The bulkhead design allows the fitting to pass through a panel or enclosure wall, with the shutoff function isolating flow on one end when disconnected. Installation is typically performed by plumbers, HVAC technicians, or industrial pipefitters working on tubing assemblies.
This coupler is suited for use in fluid handling, instrumentation, and mechanical systems where a panel-mount tube connection with single end shutoff capability is required. The 316 stainless steel construction makes it appropriate for applications where resistance to corrosion, moisture, or mild chemical exposure is a priority. It is commonly installed in light commercial and industrial service environments requiring secure, leak-resistant bulkhead tube connections at compression fittings.
Designed as an OEM-style replacement or new-installation fitting for compression tube systems requiring a single end shutoff bulkhead coupler in 316 stainless steel.
Installation should be performed by a licensed plumber, pipefitter, or qualified mechanical technician. Depressurize and isolate the system before removing or installing any compression fitting. Use appropriate tube cutting and deburring tools to ensure a clean, square tube end before seating into the compression fitting. Follow applicable codes including IPC and ASME B31 standards for tube and piping systems.
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