Swagelok SS-QC4-B-400K4 is a high-performance 316 stainless steel instrumentation quick connect body designed for the QC4 series. This component is engineered for applications requiring frequent connections and disconnections while maintaining system integrity through minimal air inclusion and minimal spillage. It features a 1/4 inch Swagelok tube fitting end connection and is distinguished by a yellow keyed sleeve, which prevents accidental intermixing with other keyed series in multi-fluid systems.

This quick connect body provides a maximum flow coefficient (Cv) of 0.2 when coupled with a double-end shut-off (DESO) stem, and up to 0.3 when used with a single-end shut-off (SESO) stem. The robust design supports a pressure rating of 3000 PSIG at room temperature when coupled, and maintains a 250 PSIG rating at its maximum operating temperature of 400°F (204°C). The internal seals utilize Fluorocarbon FKM O-rings and Dow Corning 111 lubricant for reliable performance across its temperature range.

Technical Specifications

Feature	Details
Model Number	SS-QC4-B-400K4
Body Material	316 Stainless Steel
Connection Type	1/4 in. Swagelok® Tube Fitting
Keying Type	Yellow Keyed Sleeve
Air Inclusion / Spillage	0.3 cm³
Cleaning Process	Standard Cleaning and Packaging (SC-10)
eClass (10.1)	37020500
UNSPSC (17.1001)	27121701

Pressure and Temperature Ratings

Ratings vary significantly based on the coupling state and environmental temperature:

• Coupled at 70°F (21°C): 3000 PSIG (206 BAR)
• Coupled at 400°F (204°C): 250 PSIG (17.2 BAR)
• Uncoupled at 70°F (21°C): 250 PSIG (17.2 BAR)
• Coupling/Uncoupling Limit: 250 PSIG @ 70°F (17.2 BAR @ 21°C)

Safe Product Selection

To ensure safe, trouble-free performance, the total system design must be considered. 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 or components with those of other manufacturers.

Keyed Feature

Swagelok keyed quick connects provide a mechanical lockout to prevent cross-contamination of different lines. The SS-QC4-B-400K4 features a Yellow Keyed Sleeve, meaning it will only couple with Swagelok QC4 series stems that are also color-coded and keyed for the yellow configuration.