Swagelok SS-QC4-D-4PFKZ is a QC4 series instrumentation quick connect stem manufactured from 316 stainless steel, designed for applications requiring high-performance sealing and frequent connection cycles. This stem features an integrated valve (DESO - Double End Shut-Off) that minimizes spillage and air inclusion during coupling and uncoupling. It is equipped with perfluorocarbon FFKM O-rings and lubricated with Krytox GPL 206 to ensure compatibility with demanding chemical environments and high-temperature service up to 500°F (260°C).

DESO Stems

Swagelok quick connects provide quick, easy connections for systems requiring frequent assembly. The DESO (Double-End Shut-Off) stem design is engineered for:

• Minimal air inclusion during connection.
• Minimal spillage during disconnection.
• Efficient flow with a 0.2 Cv rating.

Technical Specifications

Feature	Specification
Body Material	316 Stainless Steel
Connection 1	1/4 in. Female NPT
O-Ring Material	Perfluorocarbon FFKM
Lubricant	Krytox GPL 206
Cleaning Process	Standard Cleaning and Packaging (SC-10)
Series	QC4

Pressure and Temperature Ratings

Condition	Pressure Rating	Temperature
Coupled at Room Temp	3000 PSIG (206 BAR)	70 °F (21 °C)
Coupled at Max Temp	150 PSIG (10.3 BAR)	500 °F (260 °C)
Uncoupled at Room Temp	250 PSIG (17.2 BAR)	70 °F (21 °C)
Coupling/Uncoupling Limit	250 PSIG (17.2 BAR)	70 °F (21 °C)

Safe Product Selection

When selecting Swagelok 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 components from other manufacturers.