Parker 393PDSS-4-4 Compression Shutoff Insert 316 Ss

Product Description

The PARKER 393PDSS-4-4 is a compression shutoff type insert fitting designed for use in fluid control and instrumentation tubing systems. Machined from 316 stainless steel, it provides corrosion resistance in demanding process, HVAC, and industrial environments. The fitting connects compression to compression and carries a maximum working pressure of 150 psi. It is installed by licensed plumbers, HVAC technicians, and instrumentation technicians who require a reliable shutoff point within a compression tube assembly without introducing additional fittings or reducing flow path integrity.

This fitting is suited for applications in commercial and industrial settings where tube lines must be isolated for service or system balancing. Typical install scenarios include instrumentation panels, process control lines, and HVAC refrigerant or fluid circuits that use compression-style tubing connections. The 3/8-24 straight thread size and compression x compression end connections make it a direct-fit insert for compatible tube line configurations. Operating temperature range is 0 degrees F minimum to 149 degrees F maximum (approximately 65 degrees C maximum).

Key Features

• 316 stainless steel construction for corrosion resistance in wet and chemical-exposure environments
• Compression x compression end connections for tool-accessible, leak-resistant tube joints
• Shutoff type insert design allows isolation within existing compression tube lines
• 150 psi maximum working pressure rated for process and HVAC fluid service
• 3/8-24 straight thread size for precise fitment in compatible fittings and manifolds
• Single-piece package quantity suitable for individual service calls or small assembly work

Compatibility

Designed as an OEM-style replacement or service insert for compression tube systems requiring shutoff functionality at compression x compression connection points.

Installation Notes

Installation should be performed by a qualified plumber or instrumentation technician familiar with compression fitting assembly. Depressurize and drain the affected tube line completely before removing or inserting any compression fitting. Do not over-tighten compression nuts, as this can deform the ferrule and compromise the seal. Follow applicable IPC or process piping codes for pressure testing after installation.