Swagelok SS-QC4-B-4PFK2 is a 316 stainless steel instrumentation quick-connect body from the QC4 series, designed for applications requiring frequent connections with minimal air inclusion and spillage. This specific model features a 1/4 in. female NPT end connection and is equipped with an orange keyed sleeve to prevent accidental intermixing with other keyed lines in a system.

The QC4 series body provides a flow coefficient (Cv) of 0.2 when coupled with a Double-End Shut-Off (DESO) stem, and increases to 0.3 when used with a Single-End Shut-Off (SESO) stem. It utilizes high-performance Fluorocarbon FKM O-rings and is lubricated with Dow Corning 111. All units undergo standard cleaning and packaging according to Swagelok SC-10 specifications.

Technical Specifications

Attribute	Value
Air Inclusion	0.3 cm³
Spillage	0.3 cm³
Cleaning Process	Standard Cleaning and Packaging (SC-10)
Lubricant	Dow Corning 111
O-Ring Material	Fluorocarbon FKM
Body Material	316 Stainless Steel

Pressure and Temperature Ratings

Condition	Rating
Coupled at Room Temp	3000 PSIG @ 70 °F (206 BAR @ 21 °C)
Coupled at Max Temp	250 PSIG @ 400 °F (17.2 BAR @ 204 °C)
Uncoupled at Room Temp	250 PSIG @ 70 °F (17.2 BAR @ 21 °C)
Coupling/Uncoupling Rating	250 PSIG @ 70 °F (17.2 BAR @ 21 °C)

Safe Product Selection

When selecting products, the total system design must be considered to ensure safe, trouble-free performance. Function, material compatibility, adequate ratings, proper installation, operation, and maintenance are the responsibilities of the system designer and user. Do not mix or interchange Swagelok products with those of other manufacturers.